Design of a planar balun

Innovation of the Marchand balun model is presented. The structure of the designed planar microstrip matching circuit is fairly simple, practical and easily fabricated without requiring complex multiple metal or dielectric layers. Moreover, the designed balun performs well. The measured phase difference between balance ports was within 180/spl deg//spl plusmn/3/spl deg/ from 1.9 GHz to 3.9 GHz and results of S/sub 21/ and S/sub 31/ are fairly close to -3 dB from 2.4 GHz to 3.2 GHz. Design and simulation of a planar microstrip balun with its measured results show good agreement with the simulated data.

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

[2]  Yoichi Saito,et al.  Fast channel impulse response estimation scheme for adaptive maximum likelihood sequence estimation equalizer—proposal of variable-gain least mean square algorithm , 1996 .

[3]  Kuldip Gupta,et al.  A new design procedure for single-layer and two-layer three-line baluns , 1998, IMS 1998.

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

[5]  N. Marchand,et al.  Transmission-line Conversion Transformers , 1944 .

[6]  M. Kintis,et al.  A broadband planar monolithic ring mixer , 1996, IEEE 1996 Microwave and Millimeter-Wave Monolithic Circuits Symposium. Digest of Papers.

[7]  Ki-Chai Kim,et al.  Antenna factors of half‐wavelength dipole antennas with roberts balun , 1996 .

[8]  Hwann-Kaeo Chiou,et al.  Lumped-element compensated high/low-pass balun design for MMIC double-balanced mixer , 1997 .

[9]  A. M. Pavio,et al.  Double balanced mixers using active and passive techniques , 1988 .

[10]  Paul R. Gray,et al.  A 1.9-GHz, 1-W CMOS class-E power amplifier for wireless communications , 1999 .

[11]  M. Basraoui,et al.  Wideband, planar, log-periodic balun , 1998, 1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192).

[13]  M. P. Ventresca,et al.  A compact wideband balanced mixer , 1994, 1994 IEEE MTT-S International Microwave Symposium Digest (Cat. No.94CH3389-4).

[14]  Masaaki Kuzuhara,et al.  L/S-band 140 W push-pull power AlGaAs/GaAs HFETs for digital cellular base stations , 1998 .

[15]  M. C. Tsai.  A new compact wideband balun , 1993, IEEE 1993 Microwave and Millimeter-Wave Monolithic Circuits Symposium Digest of Papers.

[16]  Kwang-Eui Pyun,et al.  A low noise amplifier for a multi-band and multi-mode handset , 1998, 1998 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium. Digest of Papers (Cat. No.98CH36182).