Compact Dual-Band Branch-Line and Rat-Race Couplers with Stepped Coupled-Line
This study constructs stepped-impedance coupled-lines for a dual-band coupler design over a frequency ratio range of 1.8-3.0. The proposed structure demonstrates good dual-band performance and compact size due to the centric arrangement of the excitation ports, which allows a more space-efficient circuit configuration. The developed synthesis method utilizes stepped impedance coupled-line to achieve the required quarter-wave impedance transformation at two designated frequencies. The odd-even phase difference in micro-strip implemented coupled-line is investigated in detail for practical circuit implementation. The current work fabricates two experimental circuits, including a dual-band branchline coupler and a dual-band rat-race coupler. The measured results validate good dual-band performance at 0.9/2.0 GHz, with good agreement with EM simulation in Ansoft HFSS.
Yucheng Liu Wenhua Chen Zhenghe Feng
Department of Electronic Engineering, Tsinghua University 1 Tsinghua Park Haidian, Beijing 100084 CHINA
国际会议
2011 China-Japan Joint Microwave Conference(2011年中日微波会议CJMW 2011)
杭州
英文
336-339
2011-04-20（万方平台首次上网日期，不代表论文的发表时间）