標題: Exact Synthesis and Implementation of New High-Order Wideband Marchand Baluns
作者: Lu, Jhe-Ching
Lin, Chung-Chieh
Chang, Chi-Yang
電信工程研究所
Institute of Communications Engineering
關鍵字: Circuit transformations;high-pass prototype;Marchand balun;planar structures;synthesis;wideband
公開日期: 1-Jan-2011
摘要: New ultra-wideband high-order Marchand baluns with one microstrip unbalanced port and two microstrip balanced ports are proposed in this paper. The proposed Marchand baluns are synthesized based on an S-plane high-pass prototype using the Richards' transformation. The responses of the synthesized high-order Marchand baluns are exactly predicted at all real frequencies. All circuit elements are commensurate, which means the electrical lengths of all transmission line elements are a quarter-wavelength long at the center frequency. Two fifth-order Marchand baluns with reflection coefficients of -20.53 and -21.71 dB corresponding to 131% and 152% bandwidth, respectively, are synthesized and realized using the combinations of microstrip lines, slotlines, and coplanar striplines. Simulated and measured results are presented.
URI: http://dx.doi.org/10.1109/TMTT.2010.2090702
http://hdl.handle.net/11536/26072
ISSN: 0018-9480
DOI: 10.1109/TMTT.2010.2090702
期刊: IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Volume: 59
Issue: 1
起始頁: 80
結束頁: 86
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