High Efficiency RF and Microwave Solid State Power Amplifiers

Preface. About the Authors. Acknowledgments. 1 Power Amplifier Fundamentals. 1.1 Introduction. 1.2 Definition of Power Amplifier Parameters. 1.3 Distortion Parameters. 1.4 Power Match Condition. 1.5 Class of Operation. 1.6 Overview of Semiconductors for PAs. 1.7 Devices for PA. 1.8 Appendix: Demonstration of Useful Relationships. 1.9 References. 2 Power Amplifier Design. 2.1 Introduction. 2.2 Design Flow. 2.3 Simplified Approaches. 2.4 The Tuned Load Amplifier. 2.5 Sample Design of a Tuned Load PA. 2.6 References. 3 Nonlinear Analysis for Power Amplifiers. 3.1 Introduction. 3.2 Linear vs. Nonlinear Circuits. 3.3 Time Domain Integration. 3.4 Example. 3.5 Solution by Series Expansion. 3.6 The Volterra Series. 3.7 The Fourier Series. 3.8 The Harmonic Balance. 3.9 Envelope Analysis. 3.10 Spectral Balance. 3.11 Large Signal Stability Issue. 3.12 References. 4 Load Pull. 4.1 Introduction. 4.2 Passive Source/Load Pull Measurement Systems. 4.3 Active Source/Load Pull Measurement Systems. 4.4 Measurement Test-sets. 4.5 Advanced Load Pull Measurements. 4.6 Source/Load Pull Characterization. 4.7 Determination of Optimum Load Condition. 4.8 Appendix: Construction of Simplified Load Pull Contours through Linear Simulations. 4.9 References. 5 High Efficiency PA Design Theory. 5.1 Introduction. 5.2 Power Balance in a PA. 5.3 Ideal Approaches. 5.4 High Frequency Harmonic Tuning Approaches. 5.5 High Frequency Third Harmonic Tuned (Class F). 5.6 High Frequency Second Harmonic Tuned. 5.7 High Frequency Second and Third Harmonic Tuned. 5.8 Design by Harmonic Tuning. 5.9 Final Remarks. 5.10 References. 6 Switched Amplifiers. 6.1 Introduction. 6.2 The Ideal Class E Amplifier. 6.3 Class E Behavioural Analysis. 6.4 Low Frequency Class E Amplifier Design. 6.5 Class E Amplifier Design with 50# Duty-cycle. 6.6 Examples of High Frequency Class E Amplifiers. 6.7 Class E vs. Harmonic Tuned. 6.8 Class E Final Remarks. 6.9 Appendix: Demonstration of Useful Relationships. 6.10 References. 7 High Frequency Class F Power Amplifiers. 7.1 Introduction. 7.2 Class F Description Based on Voltage Wave-shaping. 7.3 High Frequency Class F Amplifiers. 7.4 Bias Level Selection. 7.5 Class F Output Matching Network Design. 7.6 Class F Design Examples. 7.7 References. 8 High Frequency Harmonic Tuned Power Amplifiers. 8.1 Introduction. 8.2 Theory of Harmonic Tuned PA Design. 8.3 Input Device Nonlinear Phenomena: Theoretical Analysis. 8.4 Input Device Nonlinear Phenomena: Experimental Results. 8.5 Output Device Nonlinear Phenomena. 8.6 Design of a Second HT Power Amplifier. 8.7 Design of a Second and Third HT Power Amplifier. 8.8 Example of 2nd HT GaN PA. 8.9 Final Remarks. 8.10 References. 9 High Linearity in Efficient Power Amplifiers. 9.1 Introduction. 9.2 Systems Classification. 9.3 Linearity Issue. 9.4 Bias Point Influence on IMD. 9.5 Harmonic Loading Effects on IMD. 9.6 Appendix: Volterra Analysis Example. 9.7 References. 10 Power Combining. 10.1 Introduction. 10.2 Device Scaling Properties. 10.3 Power Budget. 10.4 Power Combiner Classification. 10.5 The T-junction Power Divider. 10.6 Wilkinson Combiner. 10.7 The Quadrature (90 ) Hybrid. 10.8 The 180 Hybrid (Ring Coupler or Rat-race). 10.9 Bus-bar Combiner. 10.10 Other Planar Combiners. 10.11 Corporate Combiners. 10.12 Resonating Planar Combiners. 10.13 Graceful Degradation. 10.14 Matching Properties of Combined PAs. 10.15 Unbalance Issue in Hybrid Combiners. 10.16 Appendix: Basic Properties of Three-port Networks. 10.17 References. 11 The Doherty Power Amplifier. 11.1 Introduction. 11.2 Doherty's Idea. 11.3 The Classical Doherty Configuration. 11.4 The 'AB-C' Doherty Amplifier Analysis. 11.5 Power Splitter Sizing. 11.6 Evaluation of the Gain in a Doherty Amplifier. 11.7 Design Example. 11.8 Advanced Solutions. 11.9 References. Index.

[1]  J.J. Rosenberg,et al.  A Ka-band grid amplifier module with over 10 Watts output power , 2004, 2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535).

[2]  Andrea Ferrero,et al.  A complete measurement Test-Set for non-linear device characterization , 2001, 58th ARFTG Conference Digest.

[3]  M. Pagani,et al.  Improvement of PHEMT intermodulation prediction through the accurate modelling of low-frequency dispersion effects , 2005, IMS 2005.

[4]  R. A. McTaggart,et al.  GaAs metamorphic HEMT (MHEMT): an attractive alternative to InP HEMTs for high performance low noise and power applications , 2000, Conference Proceedings. 2000 International Conference on Indium Phosphide and Related Materials (Cat. No.00CH37107).

[5]  J. J. Bussgang,et al.  Analysis of nonlinear systems with multiple inputs , 1974 .

[6]  M. Cohn,et al.  A 10 Watt Broadband FET Combiner/Amplifier , 1979, 1979 IEEE MTT-S International Microwave Symposium Digest.

[7]  Jaijeet S. Roychowdhury,et al.  Computation of circuit waveform envelopes using an efficient, matrix-decomposed harmonic balance algorithm , 1996, Proceedings of International Conference on Computer Aided Design.

[8]  Fadhel M. Ghannouchi,et al.  Simultaneous AM-AM/AM-PM distortion measurements of microwave transistors using active load-pull and six-port techniques , 1995 .

[9]  Cheng Sun,et al.  Millimeter-Wave Power-Combining Techniques , 1983 .

[10]  H. Ogawa,et al.  Multilayer MMIC directional couplers using thin dielectric layers , 1995 .

[11]  Renato G. Bosisio,et al.  Source-pull/load-pull oscillator measurements at microwave/MM wave frequencies , 1992 .

[12]  A. J. Wilkinson,et al.  Transmission-line load-network topology for class-E power amplifiers , 2001 .

[13]  Frederick Raab,et al.  Efficiency of Doherty RF Power-Amplifier Systems , 1987, IEEE Transactions on Broadcasting.

[14]  P. Saunier,et al.  Ka-band CW power performance by AlGaN/GaN HEMTs on SiC , 2003, 61st Device Research Conference. Conference Digest (Cat. No.03TH8663).

[15]  D. J. Mellor.  Improved Computer-Aided Synthesis Tools for the Design of Matching Networks for Wide-Band Microwave Amplifiers , 1986 .

[16]  E. Marazzi,et al.  A General-Purpose Program for Nonlinear Microwave Circuit Design , 1983 .

[17]  Franco Giannini,et al.  Combined class F monolithic PA design , 2007 .

[18]  Franco Giannini,et al.  On the class‐F power amplifier design , 1999 .

[19]  C. S. Aitchison,et al.  A low third order intermodulation amplifier with harmonic feedback circuitry , 1996, 1996 IEEE MTT-S International Microwave Symposium Digest.

[20]  R. Gilmore.  Nonlinear Circuit Design Using the Modified Harmonic Balance Algorithm , 1986 .

[21]  Stephen A. Maas,et al.  Microwave Mixers , 1986 .

[22]  Renato G. Bosisio,et al.  Dual-tone calibration of six-port junction and its application to the six-port direct digital millimetric receiver , 1996 .

[23]  Huey-Ru Chuang,et al.  A simple and effective load-pull system for RF power transistor large-signal measurements for wireless communication power amplifier design , 1997 .

[24]  P.J.C. Rodrigues.  An orthogonal almost-periodic Fourier transform for use in nonlinear circuit simulation , 1994, IEEE Microwave and Guided Wave Letters.

[25]  J. M. Osepchuk,et al.  Microwave power applications , 2002 .

[26]  Franco Giannini,et al.  Load-Pull Techniques , 2005 .

[27]  K.-K.M. Cheng,et al.  A novel approach to the design and implementation of dual-band compact planar 90° branch-line coupler , 2004, IMS 2004.

[28]  Andrea Pierenrico Ferrero,et al.  An improved calibration technique for on-wafer large-signal transistor characterization , 1993 .

[29]  Leon O. Chua,et al.  Algorithms for computing almost periodic steady-state response of nonlinear systems to multiple input frequencies , 1981 .

[30]  Fadhel M. Ghannouchi,et al.  Noise measurements of microwave transistors using an uncalibrated mechanical stub tuner and a built-in reverse six-port reflectometer , 1995 .

[31]  V. G. Krizhanovskii,et al.  High-Efficiency Microwave BJT Power Amplifier , 2006 .

[32]  M. L. Edwards,et al.  A new criterion for linear 2-port stability using a single geometrically derived parameter , 1992 .

[33]  Anthony E. Parker,et al.  Effect of baseband impedance on FET intermodulation , 2003 .

[34]  Brad Binder,et al.  Transmit Receive Modules , 2005, Active Electronically Scanned Arrays.

[35]  R. Jackson,et al.  Rollett Proviso in the Stability of Linear Microwave Circuits—A Tutorial , 2006, IEEE Transactions on Microwave Theory and Techniques.

[36]  T. Kawai,et al.  Planar-circuit-type 3-dB quadrature hybrids , 1994, 1994 IEEE MTT-S International Microwave Symposium Digest (Cat. No.94CH3389-4).

[37]  F. H. Raab,et al.  High-efficiency single-sideband HF/VHF transmitter based upon envelope elimination and restoration , 1994 .

[38]  X. Lu.  An alternative approach to improving the efficiency of high power radio frequency amplifiers , 1992 .

[39]  Kimberley W. Eccleston,et al.  Harmonic load modulation in Doherty amplifiers , 2008 .

[40]  A.A.M. Saleh.  Planar, Multiport, Quadrature-Like Power Dividers/Combiners , 1980, 1980 IEEE MTT-S International Microwave symposium Digest.

[41]  Tadashi Suetsugu,et al.  Design procedure of class-E amplifier for off-nominal operation at 50% duty ratio , 2006, IEEE Transactions on Circuits and Systems I: Regular Papers.

[42]  W.R. Hewlett,et al.  Distributed Amplification , 1948, Proceedings of the IRE.

[43]  E. Bedrosian,et al.  The output properties of Volterra systems (nonlinear systems with memory) driven by harmonic and Gaussian inputs , 1971 .

[44]  F.M. Ghannouchi,et al.  On the design of MMIC multi-harmonic load terminations for class-F amplifiers , 2006, 2006 European Microwave Conference.

[45]  Kai Chang,et al.  Broad-band uniplanar hybrid-ring and branch-line couplers , 1993 .

[46]  A. K. Agrawal,et al.  A broad-band printed circuit hybrid ring power divider , 1989 .

[47]  G. Vannini,et al.  Computationally Efficient Multitone Analysis of Non-Linear Microwave Circuits , 1991, 1991 21st European Microwave Conference.

[48]  Andrei Grebennikov.  Load Network Design Techniques for Class E RF and Microwave Amplifiers , 2004 .

[49]  Lawrence E. Larson.  SiGe HBT BiCMOS Technology as an Enabler forNext Generation Communications Systems , 2004 .

[50]  Anthony E. Parker,et al.  Baseband impedance and linearization of FET circuits , 2003 .

[51]  Frederick H. Raab,et al.  Efficiency of Outphasing RF Power-Amplifier Systems , 1985, IEEE Trans. Commun..

[52]  L. Sukamto,et al.  A novel Wilkinson power divider with predictable performance at K and Ka-band , 1994, 1994 IEEE MTT-S International Microwave Symposium Digest (Cat. No.94CH3389-4).

[53]  F. Raab.  Class-E, Class-C, and Class-F power amplifiers based upon a finite number of harmonics , 2001 .

[54]  John Litva,et al.  A new active array module for spatial power combiners and active antennas , 1995 .

[55]  P.J.C. Rodrigues.  A general mapping technique for Fourier transform computation in nonlinear circuit analysis , 1997 .

[56]  Walter Kruppa,et al.  Trapping effects and microwave power performance in AlGaN/GaN HEMTs , 2001 .

[57]  R. Zulinski,et al.  An exact analysis of class E amplifiers with finite DC-feed inductance at any output Q , 1990 .

[58]  W. P. Ou,et al.  Design Equations for an Interdigitated Directional Coupler (Short Papers) , 1975 .

[59]  C. Camacho-Peñalosa,et al.  Modelling frequency dependence of output impedance of a microwave MESFET at low frequencies , 1985 .

[60]  N. Camilleri,et al.  35 GHz GaAs power MESFETs and monolithic amplifiers , 1989 .

[61]  L.C.N. de Vreede,et al.  A High-Efficiency 100-W GaN Three-Way Doherty Amplifier for Base-Station Applications , 2008, IEEE Transactions on Microwave Theory and Techniques.

[62]  Jose C. Pedro,et al.  Large- and small-signal IMD behavior of microwave power amplifiers , 1999 .

[63]  Michael B. Steer,et al.  Jacobian calculation using the multidimensional fast Fourier transform in the harmonic balance analysis of nonlinear circuits , 1990 .

[64]  H. V. Shurmer,et al.  Computer-aided design of microwave integrated circuits , 1978 .

[65]  A. Monti,et al.  New Developments in Gallium Nitride and the Impact on Power Electronics , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[66]  Jose C. Pedro,et al.  Accurate simulation of GaAs MESFET's intermodulation distortion using a new drain-source current model , 1994 .

[67]  Victor L. Granatstein,et al.  Vacuum electronics at the dawn of the twenty-first century , 1999, Proc. IEEE.

[68]  J. Paramesh,et al.  A 90-nm CMOS Doherty power amplifier with minimum AM-PM distortion , 2006, IEEE Journal of Solid-State Circuits.

[69]  Mike Golio.  RF and microwave semiconductor device handbook , 2003 .

[70]  E. Camargo.  Design of FET Frequency Multipliers and Harmonic Oscillators , 1998 .

[71]  Y. Ayasli,et al.  Capacitively coupled traveling-wave power amplifier , 1984, IEEE Transactions on Electron Devices.

[72]  Marian K. Kazimierczuk,et al.  Exact analysis of class E tuned power amplifier at any Q and switch duty cycle , 1987 .

[73]  Youngwoo Kwon,et al.  A new "series-type" Doherty amplifier for miniaturization , 2005, 2005 IEEE Radio Frequency integrated Circuits (RFIC) Symposium - Digest of Papers.

[74]  G. Heiter.  Characterization of Nonlinearities in Microwave Devices and Systems , 1973 .

[75]  Marian K. Kazimierczuk,et al.  Class E amplifier operating from a short circuit to an open circuit , 1989, Proceedings of the IEEE National Aerospace and Electronics Conference.

[76]  A. Mediano,et al.  High-Efficiency Broadband Parallel-Circuit Class E RF Power Amplifier With Reactance-Compensation Technique , 2008, IEEE Transactions on Microwave Theory and Techniques.

[77]  Ban-Leong Ooi,et al.  Broad-banding technique for in-phase hybrid ring equal power divider , 2002 .

[78]  K. Hettak,et al.  Compact MMIC CPW and asymmetric CPS branch-line couplers and Wilkinson dividers using shunt and series stub loading , 2005, IEEE Transactions on Microwave Theory and Techniques.

[79]  C. Paoloni,et al.  Nonlinear yield analysis and optimization of monolithic microwave integrated circuits , 1995 .

[80]  Shawn Patrick Stapleton,et al.  Design of N-way distributed Doherty amplifier for WCDMA and OFDM applications , 2007 .

[81]  S.C. Cripps,et al.  A Theory for the Prediction of GaAs FET Load-Pull Power Contours , 1983, 1983 IEEE MTT-S International Microwave Symposium Digest.

[82]  A. Inoue,et al.  Efficiency enhancement of Doherty amplifier with combination of class-F and inverse class-F schemes for S-band base station application , 2004, 2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535).

[83]  Raphaël Sommet,et al.  Model order reduction of linear and nonlinear 3D thermal finite‐element description of microwave devices for circuit analysis , 2005 .

[84]  T. Itoh,et al.  A branch-line coupler with two arbitrary operating frequencies using left-handed transmission lines , 2003, IEEE MTT-S International Microwave Symposium Digest, 2003.

[85]  J.-E. Muller,et al.  Comparison of active versus passive on-wafer load-pull characterisation of microwave and mm-wave power devices , 1994, 1994 IEEE MTT-S International Microwave Symposium Digest (Cat. No.94CH3389-4).

[86]  J. Chramiec,et al.  Microwave and Millimeter-Wave Diode Frequency Multipliers , 1995 .

[87]  U. Pisani,et al.  Load-Pull Characterization for Mesfet Oscillator Design , 1986, 27th ARFTG Conference Digest.

[88]  I. Wolff,et al.  Asymmetric four-port and branch-line hybrids , 2000 .

[89]  R. G. Freitag,et al.  A unified analysis of MMIC power amplifier stability , 1992, 1992 IEEE Microwave Symposium Digest MTT-S.

[90]  K. B. Niclas,et al.  The Declining Drain Line Lengths Circuit--A Computer Derived Design Concept Applied to a 2 26.5-GHz Distributed Amplifier , 1986 .

[91]  G. Ponchak,et al.  Miniaturized Wilkinson power dividers utilizing capacitive loading , 2002, IEEE Microwave and Wireless Components Letters.

[92]  R. Matreci,et al.  A 20 GHz Doherty power amplifier MMIC with high efficiency and low distortion designed for broad band digital communication systems , 2000, 2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017).

[93]  M.T. Ozalas.  High efficiency class-F MIMIC power amplifiers at ku-band , 2005, The 2005 IEEE Annual Conference Wireless and Micrwave Technology, 2005..

[94]  I. Wolff,et al.  Three-port 3-dB power divider terminated by arbitrary impedances , 1998, 1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192).

[95]  C. W. Gear,et al.  Simultaneous Numerical Solution of Differential-Algebraic Equations , 1971 .

[96]  S. Nishiki,et al.  Harmonic Reaction Amplifier - A Novel High-Efficiency and High-Power Microwave Amplifier , 1987, 1987 IEEE MTT-S International Microwave Symposium Digest.

[97]  Zoya Popovic,et al.  Switched-mode high-efficiency microwave power amplifiers in a free-space power-combiner array , 1998 .

[98]  P.J. Tasker,et al.  Full extraction of PHEMT state functions using time domain measurements , 2001, 2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157).

[99]  Kai Chang,et al.  A 63 W W-Band Injection-Locked Pulsed Solid State Transmitter , 1981, 1981 IEEE MTT-S International Microwave Symposium Digest.

[100]  S. Gao,et al.  High efficiency class-F RF/microwave power amplifiers , 2006, IEEE Microwave Magazine.

[101]  Ji Xin Chen,et al.  Arbitrarily dual-band components using simplified structures of conventional CRLH TLs , 2006, IEEE Transactions on Microwave Theory and Techniques.

[102]  Franco Giannini,et al.  Distortion sideband asymmetries in power amplifiers through volterra series , 2004 .

[103]  Renato G. Bosisio,et al.  A new multiharmonic loading method for large-signal microwave and millimeter-wave transistor characterization , 1991 .

[104]  Joy Laskar,et al.  Study of self-heating effects, temperature-dependent modeling, and pulsed load-pull measurements on GaN HEMTs , 2001 .

[105]  Franco Giannini,et al.  Class F high power amplifier for X-band applications , 2005 .

[106]  Y. O. Yam,et al.  Travelling-wave power combiner/divider implemented by lumped elements , 1994 .

[107]  Akira Ohta,et al.  Analysis of class-F and inverse class-F amplifiers , 2000, 2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017).

[108]  K. C. Gupta,et al.  Multiport power divider-combiner circuits using circular-sector-shaped planar components , 1988 .

[109]  R. Levy,et al.  Synthesis of Symmetrical Branch-Guide Directional Couplers , 1968 .

[110]  Tatsuo Itoh,et al.  Quasi-optical planar arrays with FETs and slots , 1993 .

[111]  Raymond S. Pengelly,et al.  Improving the Linearity and Efficiency of RF Power Amplifiers , 2002 .

[112]  B. Kopp,et al.  High-efficiency 5-watt power amplifier with harmonic tuning , 1988, 1988., IEEE MTT-S International Microwave Symposium Digest.

[113]  Rodney S. Tucker,et al.  Computer-Aided Error Correction of Large-Signal Load-Pull Measurements , 1984 .

[114]  Philippe Bouysse,et al.  A novel, accurate load-pull setup allowing the characterization of highly mismatched power transistors , 1994 .

[115]  T. Aprille,et al.  Steady-state analysis of nonlinear circuits with periodic inputs , 1972 .

[116]  P. Colantonio,et al.  High frequency class E design methodologies , 2005, European Gallium Arsenide and Other Semiconductor Application Symposium, GAAS 2005.

[117]  D. Lacombe,et al.  Unfolding the Lange Coupler (Short Papers) , 1972 .

[118]  P. Asbeck,et al.  An extended Doherty amplifier with high efficiency over a wide power range , 2001, 2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157).

[119]  Jose C. Pedro,et al.  Intermodulation Distortion in Microwave and Wireless Circuits , 2003 .

[120]  Liang-Hung Lu,et al.  X-band and K-band lumped Wilkinson power dividers with a micromachined technology , 2000, 2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017).

[121]  H. Sobol,et al.  Milestones of microwaves , 2002 .

[122]  Jia-Sheng Hong,et al.  Compact wide-band branch-line hybrids , 2006, IEEE Transactions on Microwave Theory and Techniques.

[123]  Jacob K. White,et al.  Efficient Steady-State Analysis Based on Matrix-Free Krylov-Subspace Methods , 1995, 32nd Design Automation Conference.

[124]  P. Ladbrooke,et al.  Low-field low-frequency dispersion of transconductance in GaAs MESFETs with implications for other rate-dependent anomalies , 1988 .

[125]  Dimitris Pavlidis,et al.  HBT vs . PHEMT vs . MESFET : What ' s best and why , 1999 .

[126]  Fadhel M. Ghannouchi,et al.  Six-port-based active source-pull measurement technique , 1998 .

[127]  Bumjae Shin,et al.  An adaptive bias controlled power amplifier with a load-modulated combining scheme for high efficiency and linearity , 2003, IEEE MTT-S International Microwave Symposium Digest, 2003.

[128]  L. D. Reynolds,et al.  2-20-GHz GaAs Traveling-Wave Power Amplifier , 1983 .

[129]  R. Gaddi,et al.  LDMOS electro-thermal model validation from large-signal time-domain measurements , 2001, 2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157).

[130]  H. Kondoh.  FET power performance prediction using a linearized device model , 1989, IEEE MTT-S International Microwave Symposium Digest.

[131]  D. Willems,et al.  A MMIC compatible coupled line structure that uses embedded microstrip to achieve extremely tight couplings , 1993, 1993 IEEE MTT-S International Microwave Symposium Digest.

[132]  S.P. Stapleton,et al.  Linearity optimization of a high power Doherty amplifier based on post-distortion compensation , 2005, IEEE Microwave and Wireless Components Letters.

[133]  M. Lajugie,et al.  New design method of uniform and nonuniform distributed power amplifiers , 2001 .

[134]  A. F. Allen,et al.  Microwave power SiC MESFETs and GaN HEMTs , 2003 .

[135]  S. Cohn.  A Class of Broadband Three-Port TEM-Mode Hybrids , 1968 .

[136]  Frederick H. Raab,et al.  Idealized operation of the class E tuned power amplifier , 1977 .

[137]  Jean-Michel Nebus,et al.  Optimum design of very high-efficiency microwave power amplifiers based on time-domain harmonic load-pull measurements , 2001 .

[138]  C. P. Silva.  Efficient and reliable numerical algorithms for nonlinear microwave computer-aided design , 1991, [1991] Proceedings of the 34th Midwest Symposium on Circuits and Systems.

[139]  R.B. Stancliff,et al.  Harmonic Load-Pull , 1979, 1979 IEEE MTT-S International Microwave Symposium Digest.

[140]  S. Toyoda.  High efficiency amplifiers , 1994, 1994 IEEE MTT-S International Microwave Symposium Digest (Cat. No.94CH3389-4).

[141]  T. Fernandez,et al.  Study of the influence of bias and matching networks on the distortion and memory of FET-based power amplifiers , 2008 .

[142]  Fadhel M. Ghannouchi,et al.  Multitone power and intermodulation load-pull characterization of microwave transistors suitable for linear SSPA's design , 1997 .

[143]  Franco Mastri,et al.  General-purpose harmonic balance analysis of nonlinear microwave circuits under multitone excitation , 1988 .

[144]  Wolfgang Fichtner,et al.  Lifetime prediction and design of reliability tests for high-power devices in automotive applications , 2003 .

[145]  Y. Suzuki,et al.  Highly efficient feed-forward amplifier using a Class-F Doherty amplifier , 2003, IEEE MTT-S International Microwave Symposium Digest, 2003.

[146]  L. Vestling,et al.  A novel high-frequency high-voltage LDMOS transistor using an extended gate RESURF technology , 1997, Proceedings of 9th International Symposium on Power Semiconductor Devices and IC's.

[147]  W. Yau,et al.  A New N-Way Broadband Planar Power Combiner/Divider , 1986, 1986 IEEE MTT-S International Microwave Symposium Digest.

[148]  Franco Giannini,et al.  Nonlinear approaches to the design of microwave power amplifiers , 2004 .

[149]  I. D. Robertson,et al.  A 140 GHz Wilkinson power divider/combiner , 2002, 7th IEEE High Frequency Postgraduate Student Colloquium.

[150]  S. Perlow,et al.  Automatic Load Contour Mapping for Microwave Power Transistors , 1974 .

[151]  P. Colantonio,et al.  An approach to harmonic load- and source-pull measurements for high-efficiency PA design , 2004, IEEE Transactions on Microwave Theory and Techniques.

[152]  Heung-Jae Choi,et al.  Doherty Amplifier Using Load Modulation and Phase Compensation DGS Microstrip Line , 2006, 2006 European Microwave Conference.

[153]  D. Weiner,et al.  A Scattering Variable Approach to the Volterra Analysis of Nonlinear Systems , 1976 .

[154]  Robert Anholt,et al.  Electrical and thermal characterization of MESFETs, HEMTs, and HBTs , 1994 .

[155]  Ke Wu,et al.  A compact 1.7 - 2.1 GHz three-way power combiner using microstrip technology with better than 93.8% combining efficiency , 1996, IEEE Microwave and Guided Wave Letters.

[156]  S. Mons,et al.  A unified approach for the linear and nonlinear stability analysis of microwave circuits using commercially available tools , 1999, 1999 IEEE MTT-S International Microwave Symposium Digest (Cat. No.99CH36282).

[157]  T. R. Kritzer,et al.  On Theory and Performance of Solid-State Microwave Distributed Amplifiers , 1983 .

[158]  I. Hecht.  Improved Error-Correction Technique for Large-Signal Load-Pull Measurements (Short Paper) , 1987 .

[159]  P. Colantonio,et al.  Prediction of PA Optimum Load by Small Signal Parameters , 2006, 2006 International Workshop on Integrated Nonlinear Microwave and Millimeter-Wave Circuits.

[160]  F. Raab,et al.  Power amplifiers and transmitters for RF and microwave , 2002 .

[161]  H. Zirath,et al.  1 W/mm RF power density at 3.2 GHz for a dual-layer RESURF LDMOS transistor , 2002, IEEE Electron Device Letters.

[162]  Devendra K. Misra.  Radio-Frequency and Microwave Communication Circuits: Analysis and Design , 2001 .

[163]  A.A.M. Saleh.  Improving the Graceful-Degradation Performance of Combined Power Amplifiers , 1980 .

[164]  Franco Giannini,et al.  A double frequency 180° lumped‐element hybrid , 2002 .

[165]  M.B. Steer,et al.  A novel envelope-termination load-pull method for ACPR optimization of RF/microwave power amplifiers , 1998, 1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192).

[166]  Robert E. Miles,et al.  A novel MMIC source impedance tuner for on-wafer microwave noise parameter measurements , 1996, IEEE 1996 Microwave and Millimeter-Wave Monolithic Circuits Symposium. Digest of Papers.

[167]  S. P. Marsh.  POWER SPLITTING AND COMBINING TECHNIQUES ON MMICS , 1998 .

[168]  A. Torabi,et al.  Quasi-optical power combining of solid state sources in K/sub a/-band , 1993, 1993 IEEE MTT-S International Microwave Symposium Digest.

[169]  Jose C. Pedro,et al.  Modeling MESFETs and HEMTs intermodulation distortion behavior using a generalized radial basis function network , 1999 .

[170]  G. S. Dow,et al.  High-performance in W-band monolithic pseudomorphic InGaAs HEMT LNA's and design/analysis methodology , 1992 .

[171]  Andrea Ferrero,et al.  Simple Technique for Source Reflection Coefficient Measurement While Characterizing Active Devices , 1999, 53rd ARFTG Conference Digest.

[172]  Umberto Pisani,et al.  Active load technique for load-pull characterisation at microwave frequencies , 1982 .

[173]  Herbert Kroemer,et al.  Theory of a Wide-Gap Emitter for Transistors , 1957, Proceedings of the IRE.

[174]  Ulrich L. Rohde,et al.  Microwave Circuit Design Using Linear and Nonlinear Techniques: Vendelin/Microwave Circuit Design Using Linear and Nonlinear Techniques , 1990 .

[175]  Edouard Ngoya,et al.  Efficient algorithms for spectra calculations in nonlinear microwave circuits simulators , 1990 .

[176]  Byungje Lee,et al.  Dual-band, cross coupled branch line coupler , 2005, IEEE Microwave and Wireless Components Letters.

[177]  Jangheon Kim,et al.  Highly linear three-way Doherty amplifier with uneven power drive for repeater system , 2006, IEEE Microwave and Wireless Components Letters.

[178]  W. Liu,et al.  First demonstration of high-power GaInP/GaAs HBT MMIC power amplifier with 9.9 W output power at X-band , 1994, IEEE Microwave and Guided Wave Letters.

[179]  J. Taub,et al.  A Note on N-Way Hybrid Power Dividers (Correspondence) , 1964 .

[180]  M. E. Goldfarb.  A recombinant, in-phase power divider , 1991 .

[181]  L. I. Parad,et al.  Split-Tee Power Divider , 1965 .

[182]  Frederick H. Raab,et al.  Transistor power losses in the class E tuned power amplifier , 1978 .

[183]  Kye-Ik Jeon,et al.  Input harmonics control using non-linear capacitor in GaAs FET power amplifier , 1997, IMS 1997.

[184]  Kazunaga Ikeda,et al.  Even harmonic resonant class E tuned power amplifier without RF choke , 1996 .

[185]  T. Scott,et al.  Tuned Power Amplifiers , 1964 .

[186]  Hiroshi Yamada,et al.  High efficiency and high linearity InGaP/GaAs HBT power amplifiers: matching techniques of source and load impedance to improve phase distortion and linearity , 1998 .

[187]  Robert J. Trew,et al.  The potential of diamond and SiC electronic devices for microwave and millimeter-wave power applications , 1991, Proc. IEEE.

[188]  H. Arslan,et al.  Large-signal behavioral modeling of nonlinear amplifiers based on load-pull AM-AM and AM-PM measurements , 2006, IEEE Transactions on Microwave Theory and Techniques.

[189]  G. Leuzzi,et al.  High-efficiency low-IM microwave PA design , 2001, 2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157).

[190]  Eikichi Yamashita,et al.  Improved analysis method for multiport microstrip annular-ring power-dividers , 1994 .

[191]  P. Colantonio,et al.  A 6W uneven doherty power amplifier in GaN technology , 2007, 2007 European Microwave Conference.

[192]  H. Chireix.  High Power Outphasing Modulation , 1935, Proceedings of the Institute of Radio Engineers.

[193]  K. C. Gupta,et al.  Multiple-Port Power Divider/Combiner Circuits Using Circular Microstrip Disk Configurations , 1987 .

[194]  Cheon-seok Park,et al.  High-Efficiency Class-F Amplifier Design In the Presence of Internal Parasitic Components of Transistors , 2006, 2006 European Microwave Conference.

[195]  John F. Sevic.  A Sub 1 Ω Load-Pull Quarter-Wave Pre-Matching Network Based on a Two-Tier TRL Calibration , 1998, 52nd ARFTG Conference Digest.

[196]  Tetsuo Kunii,et al.  Effect of Bias Condition and Input Harmonic Termination on High Efficiency Inverse Class-F Amplifiers , 2001, 2001 31st European Microwave Conference.

[197]  N.O. Sokal.  Class E high-efficiency power amplifiers, from HF to microwave , 1998, 1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192).

[198]  M. Miyazaki,et al.  A broadband three-way tapered-line power divider with several strip resistors , 2005, 2005 European Microwave Conference.

[199]  Sangwook Nam,et al.  A new balanced amplifier using 6-port power divider , 2001, 2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157).

[200]  T. C. Choinski.  Composite Coupler Design , 1984 .

[201]  R.A. Speciale,et al.  A Complete and Unambiguous Solution to the Super-TSD Multiport-Calibration Problem , 1983, 1983 IEEE MTT-S International Microwave Symposium Digest.

[202]  Marek E. Bialkowski,et al.  Power Combiners and Dividers , 2005 .

[203]  Fabrizio Bonani,et al.  On the application of the Kirchhoff transformation to the steady-state thermal analysis of semiconductor devices with temperature-dependent and piecewise inhomogeneous thermal conductivity , 1995 .

[204]  Alessandra Costanzo,et al.  State-of-the-art harmonic-balance simulation of forced nonlinear microwave circuits by the piecewise technique , 1992 .

[205]  占部 実,et al.  Galerkin's Procedure for Nonlinear Periodic Systems (関数方程式の近似解法研究会報告集) , 1968 .

[206]  Z. Galani,et al.  A Broadband Planar N-Way Combiner/Divider , 1977, 1977 IEEE MTT-S International Microwave Symposium Digest.

[207]  Vahe' Adamian.  2-26.5 GHZ On-Wafer Noise and S-Parameter Measurements Using a Solid State Tuner , 1989, 34th ARFTG Conference Digest.

[208]  B. Molnar.  Basic limitations on waveforms achievable in single-ended switching-mode tuned (Class E) power amplifiers , 1984 .

[209]  D. Floriot,et al.  A design method for high efficiency class F HBT amplifiers , 1996, 1996 IEEE MTT-S International Microwave Symposium Digest.

[210]  Andrea Ferrero,et al.  Large Signal 2nd Harmonic on Wafer Mesfet Characterization , 1990, 36th ARFTG Conference Digest.

[211]  E. Bergeault,et al.  Automated characterization of HF power transistors by source-pull and multiharmonic load-pull measurements based on six-port techniques , 1998 .

[212]  M. A. Rothman.  A calibrated tuner for millimeter device evaluation , 1989, Proceedings. IEEE Energy and Information Technologies in the Southeast'.

[213]  Kuldip Gupta,et al.  Multi-way unequal power divider circuits using sector-shaped planar components , 1989, IEEE MTT-S International Microwave Symposium Digest.

[214]  C. Gaquiere,et al.  An automated system for measuring power devices in Ka-band , 1998 .

[215]  C.A.T. Salama,et al.  Low voltage, high efficiency GaAs Class E power amplifiers for wireless transmitters , 1995 .

[216]  J. Reed,et al.  A Method of Analysis of Symmetrical Four-Port Networks , 1956 .

[217]  J. Laskar,et al.  Analysis and design of a high-efficiency multistage Doherty power amplifier for wireless communications , 2005, IEEE Transactions on Microwave Theory and Techniques.

[218]  B. Kruger,et al.  A quasi-microstrip traveling-wave power divider/combiner for use in high-density packages , 1993, IEEE Microwave and Guided Wave Letters.

[219]  Mitchai Chongcheawchamnan,et al.  Lumped element based Doherty power amplifier topology in CMOS process , 2003, Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03..

[220]  M. L. Meyer,et al.  Low intermodulation class-F power amplifier , 2003, Radio and Wireless Conference, 2003. RAWCON '03. Proceedings.

[221]  F. Murgadella,et al.  SSPAs & TWTAs: an evolutive situation for electronic warfare applications , 2001, GaAs IC Symposium. IEEE Gallium Arsenide Integrated Circuit Symposium. 23rd Annual Technical Digest 2001 (Cat. No.01CH37191).

[222]  M. Chodorow,et al.  Design and Performance of a High-Power Pulsed Klystron , 1953, Proceedings of the IRE.

[223]  F. Raab.  Class-F power amplifiers with maximally flat waveforms , 1997 .

[224]  Andrea Pierenrico Ferrero,et al.  Experimental characterization of nonlinear active microwave devices , 2002 .

[225]  No Sokal,et al.  CLASS-E - NEW CLASS OF HIGH-EFFICIENCY TUNED SINGLE-ENDED SWITCHING POWER AMPLIFIERS , 1975 .

[226]  Franco Giannini,et al.  A fast tool for high-efficiency microwave power amplifier design , 1997 .

[227]  O.M. Stuetzer.  A Crystal Amplifier with High Input Impedance , 1950, Proceedings of the IRE.

[228]  Yorito Ota,et al.  Source second-harmonic control for high efficiency power amplifiers , 1995 .

[229]  G. J. Herskowitz,et al.  Output Power and Loss Analysis of 2/sup n/ Injection-Locked Oscillators Combined through an Ideal and Symmetric Hybrid Combiner , 1969 .

[230]  Franco Giannini,et al.  The AB-C Doherty power amplifier. Part II: Validation , 2009 .

[231]  P. Colantonio,et al.  Investigation of IMD asymmetry in microwave FETs via Volterra series , 2005, European Gallium Arsenide and Other Semiconductor Application Symposium, GAAS 2005.

[232]  M. Berroth,et al.  A dual-frequency wilkinson power divider , 2006, IEEE Transactions on Microwave Theory and Techniques.

[233]  Franco Giannini,et al.  Input/output optimum 2nd harmonic terminations in low-voltage high-efficiency power amplifiers , 1999 .

[234]  M. Ohtomo,et al.  Proviso on the unconditional stability criteria for linear twoport , 1995 .

[235]  Renato G. Bosisio,et al.  A novel structure of tightly coupled lines for MMIC/MHMIC couplers and phase shifters , 1997 .

[236]  M. Tahara,et al.  Miniaturization of 3- and 5-way Bagley polygon power dividers , 2005, 2005 Asia-Pacific Microwave Conference Proceedings.

[237]  Franco Mastri,et al.  Pulsed-RF and transient analysis of nonlinear microwave circuits by harmonic-balance techniques , 1991, 1991 IEEE MTT-S International Microwave Symposium Digest.

[238]  P.D. van der Puije,et al.  Two-Signal Method of Measuring the Large-Signal S-Parameters of Transistors , 1978, 1978 IEEE-MTT-S International Microwave Symposium Digest.

[239]  T. Itoh,et al.  A compact enhanced-bandwidth hybrid ring using a left-handed transmission line section , 2003, IEEE MTT-S International Microwave Symposium Digest, 2003.

[240]  G. Ge,et al.  Research on microstrip multiway unequal power divider/combiner , 1996 .

[241]  ColantonioPaolo,et al.  The AB-C Doherty power amplifier. Part I: Theory , 2009 .

[242]  Robert J. Trew,et al.  Maximum efficiency tuning of microwave amplifiers , 1991, 1991 IEEE MTT-S International Microwave Symposium Digest.

[243]  E. J. Wilkinson.  An N-Way Hybrid Power Divider , 1960 .

[244]  M. Paggi,et al.  Nonlinear GaAs MESFET modeling using pulsed gate measurements , 1988, 1988., IEEE MTT-S International Microwave Symposium Digest.

[245]  W. Shockley,et al.  A Unipolar "Field-Effect" Transistor , 1952, Proceedings of the IRE.

[246]  G. F. Engen,et al.  A (historical) review of the six-port measurement technique , 1997 .

[247]  R. Varian,et al.  A High Frequency Oscillator and Amplifier , 1939 .

[248]  Ralf Dörner,et al.  Multiharmonic generators for relative phase calibration of nonlinear network analyzers , 2001, IEEE Trans. Instrum. Meas..

[249]  F. Schwierz,et al.  Microwave transistors-the last 20 years , 2000, Proceedings of the 2000 Third IEEE International Caracas Conference on Devices, Circuits and Systems (Cat. No.00TH8474).

[250]  T. Narhi.  Frequency-domain analysis of strongly nonlinear circuits using a consistent large-signal model , 1996 .

[251]  Arthur Uhlir,et al.  A Novel Procedure for Receiver Noise Characterization , 1973 .

[252]  M. Demmler,et al.  A 0.5-50 GHz on-wafer, intermodulation, load-pull and power measurement system , 1995, Proceedings of 1995 IEEE MTT-S International Microwave Symposium.

[253]  K. Nishikawa,et al.  A novel configuration for 1:N multiport power dividers using series/parallel transmission-line division and a polyimide/alumina-ceramic structure for HPA module implementation , 2001 .

[254]  Frederick H. Raab,et al.  Effects of circuit variations on the class E tuned power amplifier , 1978 .

[255]  Zhang Xiang-dong,et al.  Accurate Fourier transform method for almost-periodic response simulation of microwave nonlinear circuits , 1989 .

[256]  Michael B. Steer,et al.  Automated Large-Signal Load-Pull Characterization of Adjacent-Channel Power Ratio for Digital Wireless Communication Systems , 1995, 46th ARFTG Conference Digest.

[257]  Rainer Laur,et al.  Fast simulation of the steady-state of circuits by the harmonic balance technique , 1995, Proceedings of ISCAS'95 - International Symposium on Circuits and Systems.

[258]  N. Nagai,et al.  New N-Way Hybrid Power Dividers , 1977, 1977 IEEE MTT-S International Microwave Symposium Digest.

[259]  S. Maas,et al.  Modeling MESFETs for intermodulation analysis of mixers and amplifiers , 1990 .

[260]  Giovanni Saggio,et al.  Experimental performances of 5 GHz harmonic-manipulated high efficiency microwave power amplifiers , 2000 .

[261]  S. I. Long,et al.  Design of Class E power amplifier with nonlinear parasitic output capacitance , 1999 .

[262]  Giorgio Vannini,et al.  Stability analysis of multi-transistor microwave power amplifiers , 2000 .

[263]  Andrei Grebennikov.  Switched-mode RF and microwave parallel-circuit Class E power amplifiers , 2004 .

[264]  K. J. Russell,et al.  Microwave Power Combining Techniques , 1979 .

[265]  M. Cohn,et al.  A wideband radial power combiner for FET amplifiers , 1978, 1978 IEEE International Solid-State Circuits Conference. Digest of Technical Papers.

[266]  Kai Chang,et al.  Uniplanar power dividers using coupled CPW and asymmetrical CPS for MICs and MMICs , 1996 .

[267]  Youngoo Yang,et al.  A microwave Doherty amplifier employing envelope tracking technique for high efficiency and linearity , 2003, IEEE Microwave and Wireless Components Letters.

[268]  Moriyasu Miyazaki,et al.  A broadband asymmetric tapered-line power divider with several strip resistors , 2004, 34th European Microwave Conference, 2004..

[269]  B. Tomescu.  A unified approach to class E versus quasi-resonant switch topologies , 1998 .

[270]  S. N. Prasad,et al.  Power-bandwidth considerations in the design of MESFET distributed amplifiers , 1988 .

[271]  Steve C. Cripps,et al.  Advanced Techniques in RF Power Amplifier Design , 2002 .

[272]  Franco Giannini,et al.  Modeling power and intermodulation behavior of microwave transistors with unified small‐signal/large‐signal neural network models , 2003 .

[273]  Jose C. Pedro,et al.  Multitone frequency-domain simulation of nonlinear circuits in large- and small-signal regimes , 1998 .

[274]  Mounir Meghelli,et al.  SiGe BiCMOS integrated circuits for high-speed serial communication links , 2003, IBM J. Res. Dev..

[275]  P. Roblin,et al.  High Efficiency RF Power Amplifier Designed With Harmonic Real-Time Active Load-Pull , 2008, IEEE Microwave and Wireless Components Letters.

[276]  A. Neri,et al.  State of the art and present trends in nonlinear microwave CAD techniques , 1988 .

[277]  M. J. Page,et al.  A microstrip planar disk 3-dB quadrature hybrid , 1989, IEEE MTT-S International Microwave Symposium Digest.

[278]  S. R. Judah,et al.  A quadrature-hybrid design using a four-port elliptic patch , 1997 .

[279]  Y. Takayama.  A New Load-Pull Characterization Method for Microwave Power Transistors , 1976 .

[280]  T. Block,et al.  Future trends of HBT technology for commercial and defense applications , 1997, 1997 IEEE MTT-S Symposium on Technologies for Wireless Applications Digest.

[281]  Adolfo Comeron,et al.  Application of CAD load-pull techniques in mixer design , 2003 .

[282]  Bumjae Shin,et al.  A fully matched N-way Doherty amplifier with optimized linearity , 2003 .

[283]  Hua Quen Tserng,et al.  Harmonic tuning of power FETs at X-band , 1990, IEEE International Digest on Microwave Symposium.

[284]  James B. Beyer,et al.  MESFET Distributed Amplifier Design Guidelines , 1984 .

[285]  Denis Barataud,et al.  Measurements of time-domain voltage/current waveforms at RF and microwave frequencies based on the use of a vector network analyzer for the characterization of nonlinear devices-application to high-efficiency power amplifiers and frequency-multipliers optimization , 1998, IEEE Trans. Instrum. Meas..

[286]  M. I. Sobhy,et al.  Direct Integration Methods of Non-Linear Microwave Circuits , 1985, 1985 15th European Microwave Conference.

[287]  A. Presser,et al.  Graceful Degradation Properties of Matched N-Port Power Amplifier Combiners , 1977, 1977 IEEE MTT-S International Microwave Symposium Digest.

[288]  G.W. Taylor,et al.  A comparison of Si MOSFET and GaAs MESFET enhancement/depletion logic performance , 1985, IEEE Transactions on Electron Devices.

[289]  J. Rollett.  Stability and Power-Gain Invariants of Linear Twoports , 1962 .

[290]  Leonard R. Kahn,et al.  Single-Sideband Transmission by Envelope Elimination and Restoration , 1952, Proceedings of the IRE.

[291]  J. Taub,et al.  A More General N-Way Hybrid Power Divider (Correspondence) , 1969 .

[292]  Lionel E. Davis,et al.  Design and analysis of an X-band MMIC "bus-bar" power combiner , 1999, 1999 Symposium on High Performance Electron Devices for Microwave and Optoelectronic Applications. EDMO (Cat. No.99TH8401).

[293]  Franco Mastri,et al.  Fast and robust inexact Newton approach to the harmonic-balance analysis of nonlinear microwave circuits , 1997 .

[294]  V. Camarchia,et al.  Self-Consistent Electrothermal Modeling of Class A, AB, and B Power GaN HEMTs Under Modulated RF Excitation , 2007, IEEE Transactions on Microwave Theory and Techniques.

[295]  Dong Il Kim,et al.  Broad-Band Design of Improved Hybrid-Ring 3-dB Directional Couplers , 1982 .

[296]  W. R. Curtice.  Nonlinear Analysis of GaAs MESFET Amplifiers, Mixers, and Distributed Amplifiers Using the Harmonic Balance Technique , 1987 .

[297]  D. Staiman,et al.  New technique for combining solid-state sources , 1968 .

[298]  S. Nishiki,et al.  High efficiency microwave harmonic reaction amplifier , 1988, 1988., IEEE MTT-S International Microwave Symposium Digest.

[299]  D. Hente,et al.  Frequency domain continuation method for the analysis and stability investigation of nonlinear microwave circuits , 1986 .

[300]  Z. Galani,et al.  Single-Frequency Analysis of Radial and Planar Amplifier Combiner Circuits , 1981 .

[301]  Kevin A Morris,et al.  Removing the effects of baseband impedance on distortion in FET amplifiers , 2006 .

[302]  Youngoo Yang,et al.  Analysis and experiments for high-efficiency class-F and inverse class-F power amplifiers , 2006, IEEE Transactions on Microwave Theory and Techniques.

[303]  Robert A. York,et al.  Quasi-optical and spatial power combining , 2002 .

[304]  J. Obregon,et al.  High-efficient class F GaAs FET amplifiers operating with very low bias voltages for use in mobile telephones at 1.75 GHz , 1993, IEEE Microwave and Guided Wave Letters.

[305]  Fadhel M. Ghannouchi,et al.  Multitone characterization and design of FET resistive mixers based on combined active source-pull/load-pull techniques , 1998 .

[306]  C. Trask,et al.  Class-F amplifier loading networks: a unified design approach , 1999, 1999 IEEE MTT-S International Microwave Symposium Digest (Cat. No.99CH36282).

[307]  T.J. Brazil,et al.  An accurate nonlinear MOSFET model for intermodulation distortion analysis , 2004, IEEE Microwave and Wireless Components Letters.

[308]  G. Haddad,et al.  The method of envelope currents for rapid simulation of weakly nonlinear communications circuits , 1999, 1999 IEEE MTT-S International Microwave Symposium Digest (Cat. No.99CH36282).

[309]  W. J. Getsinger,et al.  Impedance-Transforming 3-dB 90° Hybrids , 1987 .

[310]  M. Nakajima.  A proposed multistage microwave power combiner , 1973 .

[311]  F.M. Ghannouchi,et al.  Study and Design Optimization of Multiharmonic Transmission-Line Load Networks for Class-E and Class-F $K$-Band MMIC Power Amplifiers , 2007, IEEE Transactions on Microwave Theory and Techniques.

[312]  F. Filicori,et al.  Modelling of deviations between static and dynamic drain characteristics in GaAs FETs , 1993, 1993 23rd European Microwave Conference.

[313]  Robert J. Trew,et al.  Microwave solid-state active devices , 2002 .

[314]  C. Weitzel,et al.  RF power amplifiers for wireless communications , 2002, 24th Annual Technical Digest Gallium Arsenide Integrated Circuit (GaAs IC) Symposiu.

[315]  F. Raab.  Maximum efficiency and output of class-F power amplifiers , 2001 .

[316]  R. S. Tucker,et al.  Third-Order Intermodulation Distortion and Gain Compression in GaAs Fet's , 1979 .

[317]  P.M. White,et al.  Effect of input harmonic terminations on high efficiency class-B and class-F operation of PHEMT devices , 1998, 1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192).

[318]  Glenn F. Engen.  Calibration of an Arbitrary Six-Port Junction for Measurement of Active and Passive Circuit Parameters , 1973 .

[319]  N. Wiener,et al.  Nonlinear Problems in Random Theory , 1964 .

[320]  Leon O. Chua,et al.  Frequency-domain analysis of nonlinear circuits driven by multi-tone signals , 1984 .

[321]  Ulrich H. Gysel,et al.  A New N-Way Power Divider/Combiner Suitable for High-Power Applications , 1975 .

[322]  A.A.M. Saleh.  Planar Electrically Symmetric n-Way Hybrid Power Dividers/Combiners , 1980 .

[323]  P. Saunier,et al.  AlGaN-GaN HEMTs on SiC with CW power performance of >4 W/mm and 23% PAE at 35 GHz , 2003, IEEE Electron Device Letters.

[324]  A. Darwish,et al.  Vertical balun and Wilkinson divider , 2002, 2002 IEEE MTT-S International Microwave Symposium Digest (Cat. No.02CH37278).

[325]  Franco Giannini,et al.  The high frequency class E amplifier , 2001 .

[326]  I.D. Robertson,et al.  Tri-Band Wilkinson Power Divider Using a Three-Section Transmission-Line Transformer , 2006, IEEE Microwave and Wireless Components Letters.

[327]  M. Ohtomo.  Stability analysis and numerical simulation of multidevice amplifiers , 1993 .

[328]  V. Rizzoli,et al.  Efficient Krylov-subspace simulation of autonomous RF/microwave circuits driven by digitally modulated carriers , 2001, IEEE Microwave and Wireless Components Letters.

[329]  Tadashi Suetsugu,et al.  Off-Nominal Operation of Class-E Amplifier at Any Duty Ratio , 2007, IEEE Transactions on Circuits and Systems I: Regular Papers.

[330]  Jong-Sik Lim,et al.  A new 3-way power divider with various output power ratios , 1996, 1996 IEEE MTT-S International Microwave Symposium Digest.

[331]  S. Kumar,et al.  A multisection broadband impedance transforming branch-line hybrid , 1995 .

[332]  R. Minasian.  Intermodulation Distortion Analysis of MESFET Amplifiers Using the Volterra Series Representation , 1980 .

[333]  Fadhel M. Ghannouchi,et al.  Source-pull measurements using reverse six-port reflectometers with application to MESFET mixer design , 1994 .

[334]  Alberto L. Sangiovanni-Vincentelli,et al.  Simulation of Nonlinear Circuits in the Frequency Domain , 1986, IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems.

[335]  Umesh K. Mishra,et al.  GaN-Based RF Power Devices and Amplifiers , 2008, Proceedings of the IEEE.

[336]  B. Davis,et al.  A Ka-band class F MMIC amplifier design utilizing adaptable knowledge-based neural network modeling techniques , 2003, IEEE MTT-S International Microwave Symposium Digest, 2003.

[337]  A. Inoue,et al.  A Low Distortion 25 W Class-F Power Amplifier Using Internally Harmonic Tuned FET Architecture for 3.5 GHz OFDM Applications , 2006, 2006 IEEE MTT-S International Microwave Symposium Digest.

[338]  G. Maracas,et al.  Frequency-dependent electrical characteristics of GaAs MESFETs , 1990 .

[339]  F. Murgadella,et al.  Comparisons of technologies and MMICS results for military needs , 2001, GaAs IC Symposium. IEEE Gallium Arsenide Integrated Circuit Symposium. 23rd Annual Technical Digest 2001 (Cat. No.01CH37191).

[340]  Franco Giannini,et al.  High efficiency low-voltage power amplifier design by second-harmonic manipulation , 2000 .

[341]  He Sai-ling,et al.  A tunable dual-broad-band branch-line coupler utilizing composite right/left-handed transmission lines , 2005 .

[342]  J.M. Nebus,et al.  A novel computerized multiharmonic active load-pull system for the optimization of high efficiency operating classes in power transistors , 1995, Proceedings of 1995 IEEE MTT-S International Microwave Symposium.

[343]  Zoya Popovic,et al.  The transmission-line high-efficiency class-E amplifier , 1995 .

[344]  S. T. Jellett,et al.  Analysis and design of a circular disc 3 dB coupler , 1994 .

[345]  P. Poire,et al.  A New Six-Port Based Time domain Load-pull Measurement Technique , 2000, 55th ARFTG Conference Digest.

[346]  Y. Demers,et al.  A six-port network analyzer load-pull system for active load tuning , 1990 .

[347]  Jonathan Lees,et al.  Experimental gallium nitride microwave Doherty amplifier , 2005 .

[348]  W. J. Getsinger,et al.  Quasi-Lumped-Element 3- and 4-Port Networks for MIC and MMIC Applications , 1984 .

[349]  M. Iwamoto,et al.  Linearity Improvement of HBT-Based Doherty Power Amplifiers Based on a Simple Analytical Model , 2006, IEEE Transactions on Microwave Theory and Techniques.

[350]  Bumman Kim,et al.  Optimum operation of asymmetrical-cells-based linear Doherty power Amplifiers-uneven power drive and power matching , 2005, IEEE Transactions on Microwave Theory and Techniques.

[351]  G. Sorkin,et al.  Applying harmonic balance to almost-periodic circuits , 1988 .

[352]  Valeria Teppati,et al.  New perspectives in non linear device and amplifier characterization , 2002 .

[353]  R. S. Symons,et al.  Modern microwave power sources , 2002 .

[354]  Grigori Doudorov.  Evaluation of Si-LDMOS transistors for RF Power Amplifier in 2-6 GHz frequency range , 2003 .

[355]  U. Mishra,et al.  AlGaN/GaN HEMTs-an overview of device operation and applications , 2002, Proc. IEEE.

[356]  J. Brown,et al.  A computer-controlled microwave tuner for automated load pull , 1983 .

[357]  Amir Mortazawi,et al.  A waveguide-based aperture-coupled patch amplifier array-full-wave system analysis and experimental validation , 2000 .

[358]  Jiri Vlach,et al.  A piecewise harmonic balance technique for determination of periodic response of nonlinear systems , 1976 .

[359]  otto. berger.  GaAs MESFET , HEMT and HBT Competition with Advanced Si RF Technologies , 1999 .

[360]  Masahiro Muraguchi,et al.  Reduced-size branch-line and rat-race hybrids for uniplanar MMIC's , 1990 .

[361]  F. Ghannouchi,et al.  An experimental study of the effects of harmonic loading on microwave MESFET oscillators and amplifiers , 1994, IEEE Transactions on Microwave Theory and Techniques.

[362]  Robert W. Dutton,et al.  Physics-based simulation of nonlinear distortion in semiconductor devices using the harmonic balance method , 2000 .

[363]  Denis Barataud,et al.  Measurement and control of current/voltage waveforms of microwave transistors using a harmonic load-pull system for the optimum design of high efficiency power amplifiers , 1999, IEEE Trans. Instrum. Meas..

[364]  W.H. Doherty,et al.  A New High Efficiency Power Amplifier for Modulated Waves , 1936, Proceedings of the Institute of Radio Engineers.

[365]  Choi Look Law,et al.  Prediction of Wide-Band Power Performance of MESFET Distributed Amplifiers Using the Volterra Series Representation , 1986 .

[366]  Andrew C. Davidson,et al.  Accuracy improvements in microwave noise parameter measurements , 1989 .

[367]  P. Colantonio,et al.  Optimization of Class E Power Amplifier Design above Theoretical Maximum Frequency , 2008, 2008 European Microwave Integrated Circuit Conference.

[368]  D. N. McQuiddy.  The challenge-applying high performance military MMIC fabrication processes to price driven commercial products , 1994, 1994 IEEE MTT-S International Microwave Symposium Digest (Cat. No.94CH3389-4).

[369]  B. G. Danly,et al.  Vacuum electronics , 2002 .

[370]  B. Flechet,et al.  A complete calibration procedure for time domain network analyzers , 1992, 1992 IEEE Microwave Symposium Digest MTT-S.

[371]  Kazutaka Takagi,et al.  Simulation and experimental results of source harmonic tuning on linearity of power GaAs FET under class AB operation , 1996, 1996 IEEE MTT-S International Microwave Symposium Digest.

[372]  R.E. Neidert.  Monolithic circuit for reflection coefficient measurement , 1991, IEEE Microwave and Guided Wave Letters.

[373]  Rajeev Bansal,et al.  Microwave engineering and systems applications , 1989, IEEE Antennas and Propagation Society Newsletter.

[374]  Andrea Pierenrico Ferrero,et al.  Accurate on-wafer power and harmonic measurements of MM-wave amplifiers and devices , 1992, 1992 IEEE Microwave Symposium Digest MTT-S.

[375]  Donald Pederson,et al.  A Historical Review of Circuit Simulation , 2011, IEEE Solid-State Circuits Magazine.

[376]  M. Steer,et al.  Nonlinear circuit analysis using the method of harmonic balance—A review of the art. Part I. Introductory concepts , 1991 .

[377]  P. Colantonio,et al.  Linearity and efficiency optimisation in microwave power amplifier design , 2007, 2007 European Microwave Conference.

[378]  Kwang-Seok Seo,et al.  A novel 3-dB coupler for MMIC using air-gap stacked microstrip lines , 2000 .

[379]  J.M. Yang,et al.  Performance Optimization of Ka-Band MMIC Power Amplifier Using On-Wafer Pulsed Power Test , 1997, 49th ARFTG Conference Digest.

[380]  P.J. Tasker,et al.  A study of the effect of envelope impedance on intermodulation asymmetry using a two-tone time domain measurement system , 2002, 2002 IEEE MTT-S International Microwave Symposium Digest (Cat. No.02CH37278).

[381]  Jose C. Pedro,et al.  A comprehensive explanation of distortion sideband asymmetries , 2002 .

[382]  D.L. Miller,et al.  GaAs/GaAlAs heterojunction bipolar transistors with cutoff frequencies above 10 GHz , 1982, IEEE Electron Device Letters.

[383]  Leon O. Chua,et al.  Practical Numerical Algorithms for Chaotic Systems , 1989 .

[384]  Cletus A. Hoer,et al.  The Six-Port Coupler: A New Approach to Measuring Voltage, Current, Power, Impedance, and Phase , 1972 .

[385]  F. E. Gardiol,et al.  Improvement of a Class-C Transistor Power Amplifier by Second-Harmonic Tuning , 1979 .

[386]  G. Engen,et al.  The Six-Port Reflectometer: An Alternative Network Analyzer , 1977, 1977 IEEE MTT-S International Microwave Symposium Digest.

[387]  Peter Heymann,et al.  On the Load-Pull Effect in MMIC Oscillator Measurements , 2003, 2003 33rd European Microwave Conference, 2003.

[388]  S. El-Rabaie,et al.  Harmonic balance evaluation of nonlinear microwave circuits-a tutorial approach , 1988 .

[389]  Franco Giannini,et al.  Planar analysis of radial‐line power dividers , 1990 .

[390]  C. S. Aitchison,et al.  Wide-band lumped-element quadrature 3-dB couplers in microstrip , 2000 .

[391]  S. Kusunoki,et al.  Load-impedance and bias-network dependence of power amplifier with second harmonic injection , 2004, IEEE Transactions on Microwave Theory and Techniques.

[392]  Krishna Shenai,et al.  Effect of bipolar turn-on on the static current-voltage characteristics of scaled vertical power DMOSFET's , 1995 .

[393]  Franco Giannini,et al.  Optimization of class-AB and B narrowband power amplifiers , 1993 .

[394]  Jangheon Kim,et al.  Microwave Doherty Power Amplifier for High Efficiency and Linearity , 2006, 2006 International Workshop on Integrated Nonlinear Microwave and Millimeter-Wave Circuits.

[395]  Antonio Tazón,et al.  Time-varying Volterra-series analysis of spectral regrowth and noise power ratio in FET mixers , 2001 .

[396]  F. De Flaviis,et al.  Dual-band planar quadrature hybrid with enhanced bandwidth response , 2006, IEEE Transactions on Microwave Theory and Techniques.

[397]  Paul J. Tasker,et al.  High power time domain measurement system with active harmonic load-pull for high efficiency base station amplifier design , 2000, 2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017).

[398]  C. L. Chao.  N-Way Branch Line Directional Couplers , 1974 .

[399]  R. A. Sadler,et al.  SiC MESFET hybrid amplifier with 30-W output power at 10 GHz , 2000, Proceedings 2000 IEEE/ Cornell Conference on High Performance Devices (Cat. No.00CH37122).

[400]  F. Giannini,et al.  On the Design of Optimized Microstrip Radial Line Power Dividers , 1990, 1990 20th European Microwave Conference.

[401]  A.V. Grebennikov,et al.  Class E with parallel circuit - a new challenge for high-efficiency RF and microwave power amplifiers , 2002, 2002 IEEE MTT-S International Microwave Symposium Digest (Cat. No.02CH37278).

[402]  Carlos E. Saavedra,et al.  A circuit, waveguide, and spatial power combiner for millimeter-wave amplification , 1999 .

[403]  H. Ogawa,et al.  Uniplanar MMIC Hybrids--A Proposed New MMIC Structure , 1987 .

[404]  James Redmond,et al.  History of International Broadcasting , 1993 .

[405]  Michael B. Steer,et al.  Frequency-domain nonlinear circuit analysis using generalized power series , 1988 .

[406]  Glenn F. Engen,et al.  Application of an Arbitrary 6-Port Junction to Power-Measurement Problems , 1972 .

[407]  K.-K.M. Cheng,et al.  A novel planar branch-line coupler design for dual-band applications , 2004, 2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535).

[408]  Marco Pirola,et al.  Testing microwave devices under different source impedance values-a novel technique for on-line measurement of source and device reflection coefficients , 2000, IEEE Trans. Instrum. Meas..

[409]  Michael G. Adlerstein,et al.  Power contours for microwave HBTs , 1993 .

[410]  A. O'Neill,et al.  Recent progress and current issues in SiC semiconductor devices for power applications , 2001 .

[411]  L.C.N. de Vreede,et al.  A Mixed-Signal Approach Towards Linear and Efficient $N$-Way Doherty Amplifiers , 2007, IEEE Transactions on Microwave Theory and Techniques.

[412]  N. O. Sokal.  Class-E switching-mode high-efficiency tuned RF/microwave power amplifier: improved design equations , 2000, 2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017).

[413]  M. Sannino,et al.  Determination of Microwave Two-Port Noise Parameters Through Computer-Aided Frequency-Conversion Techniques , 1979 .

[414]  Michael B. Steer,et al.  Computer‐aided analysis of nonlinear microwave circuits using frequency‐domain nonlinear analysis techniques: The state of the art , 1991 .

[415]  Brian Hughes,et al.  Improvements to On-Wafer Noise Parameter Measurements , 1990, 36th ARFTG Conference Digest.

[416]  C.F. Campbell.  A fully integrated Ku-band Doherty amplifier MMIC , 1999, IEEE Microwave and Guided Wave Letters.

[417]  David K. Woods,et al.  Reappraisal of the unconditional stability criteria for active 2-port networks in terms of S parameters , 1970 .