Power-Combining Class-E Amplifier With Finite Choke

A recently introduced power-combining scheme for a Class-E amplifier is, for the first time, experimentally validated in this paper. A small value choke of 2.2 nH was used to substitute for the massive dc-feed inductance required in the classic Class-E circuit. The power-combining amplifier presented, which operates from a 3.2-V dc supply voltage, is shown to be able to deliver a 24-dBm output power and a 9.5-dB gain, with 64% drain efficiency and 57% power-added efficiency at 2.4 GHz. The power amplifier exhibits a 350-MHz bandwidth within which a drain efficiency that is better than 60% and an output power that is higher than 22 dBm were measured. In addition, by adopting three-harmonic termination strategy, excellent second- and third-harmonic suppression levels of 50 and 46 dBc, respectively, were obtained. The complete design cycle from analysis through fabrication to characterization is explained.

[1]  Vincent Fusco,et al.  Power combining techniques into unbalanced loads for Class-E and inverse Class-E amplifiers , 2008 .

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

[3]  Changsik Yoo,et al.  A common-gate switched 0.9-W class-E power amplifier with 41% PAE in 0.25-/spl mu/m CMOS , 2001 .

[4]  P. Weger,et al.  A Fully Integrated 3.3–3.8-GHz Power Amplifier With Autotransformer Balun , 2009, IEEE Transactions on Microwave Theory and Techniques.

[5]  Jerry Lopez,et al.  Highly Efficient Monolithic Class E SiGe Power Amplifier Design at 900 and 2400 MHz , 2009, IEEE Transactions on Circuits and Systems I: Regular Papers.

[6]  David R. Cox,et al.  Linear Amplification with Nonlinear Components , 1974, IEEE Trans. Commun..

[7]  Timo Rahkonen,et al.  Comparison of two class E amplifiers for EER transmitter , 2005, 2005 IEEE International Symposium on Circuits and Systems.

[8]  J. Moon,et al.  High-Efficiency Hybrid EER Transmitter Using Optimized Power Amplifier , 2008, IEEE Transactions on Microwave Theory and Techniques.

[9]  Peter M. Asbeck,et al.  High Efficiency WCDMA Envelope Tracking Base-Station Amplifier Implemented with GaAs HVHBTs , 2008, 2008 IEEE Compound Semiconductor Integrated Circuits Symposium.

[10]  Narendra Kumar A L Aridas.  High Efficiency Broadband Parallel-Circuit Class E RF Power Amplifier with Reactance Compensation Technique , 2008 .

[11]  C. K. Michael Tse,et al.  Design of symmetrical class E power amplifiers for very low harmonic-content applications , 2005, IEEE Transactions on Circuits and Systems I: Regular Papers.

[12]  J.A. Reynoso-Hernandez,et al.  An Extension of the Classical Method to Design High Efficiency Microwave Class E PAs , 2007, IEEE Microwave and Wireless Components Letters.

[13]  Sungho Lee,et al.  A CMOS Outphasing Power Amplifier With Integrated Single-Ended Chireix Combiner , 2010, IEEE Transactions on Circuits and Systems II: Express Briefs.

[14]  Jiann-Fuh Chen,et al.  Low-Harmonic Push–Pull Class-E Power Amplifier With a Pair of LC Resonant Networks , 2007, IEEE Transactions on Circuits and Systems I: Regular Papers.

[15]  Changsik Yoo,et al.  A common-gate switched, 0.9 W class-E power amplifier with 41% PAE in 0.25 /spl mu/m CMOS , 2000, 2000 Symposium on VLSI Circuits. Digest of Technical Papers (Cat. No.00CH37103).

[16]  Vincent Fusco,et al.  2.4 GHz Class-E power amplifier with transmission-line harmonic terminations , 2007 .

[17]  Vincent F. Fusco,et al.  Inverse Class-E Amplifier With Transmission-Line Harmonic Suppression , 2007, IEEE Transactions on Circuits and Systems I: Regular Papers.

[18]  K. Takasuka,et al.  A 60% PAE WCDMA Handset Transmitter Amplifier , 2009, IEEE Transactions on Microwave Theory and Techniques.

[19]  Steadman Jw,et al.  Class E Power Amplifiers and Frequency Multipliers with finite DC-Feed Inductance , 1987 .

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

[21]  Edward J. Powers,et al.  A new Volterra predistorter based on the indirect learning architecture , 1997, IEEE Trans. Signal Process..

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

[23]  Jaehyeong Kim,et al.  A Generalized Memory Polynomial Model for Digital Predistortion of RF Power Amplifiers , 2006, IEEE Transactions on Signal Processing.

[24]  Gin-Kou Ma,et al.  Design of Highly Efficient Wideband RF Polar Transmitters Using the Envelope-Tracking Technique , 2009, IEEE Journal of Solid-State Circuits.

[25]  Dusan M. Milosevic,et al.  Intermodulation products in the EER technique applied to class-E amplifiers , 2004, 2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512).

[26]  M. Marchetti,et al.  A 90-W Peak Power GaN Outphasing Amplifier With Optimum Input Signal Conditioning , 2009, IEEE Transactions on Microwave Theory and Techniques.

[27]  C Buoli,et al.  Microwave power amplifier with "envelope controlled" drain power supply , 1995, 1995 25th European Microwave Conference.

[28]  G. Ewing,et al.  High-efficiency radio-frequency power amplifiers , 1964 .

[29]  Nathan O. Sokal,et al.  Class of High-Efficiency Tuned Switching Power Amplifiers , 2009 .

[30]  J. Laskar,et al.  A 1.8-GHz 2-Watt Fully Integrated CMOS Push-Pull Parallel-Combined Power Amplifier Design , 2007, 2007 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium.

[31]  O. Degani,et al.  A Class-E PA With Pulse-Width and Pulse-Position Modulation in 65 nm CMOS , 2009, IEEE Journal of Solid-State Circuits.