標題: Bandwidth-Enhanced Branch-Line Coupler Using the Center-Loaded Vertical Line and Distributed Capacitors
作者: Chen, Tse-Yu
Chi, Pei-Ling
電機資訊學士班
Undergraduate Honors Program of Electrical Engineering and Computer Science
關鍵字: Bandwidth enhancement;branch-line coupler;quadrature hybrid
公開日期: 2012
摘要: In this paper, the technique that loads the center of the horizontal transmission lines in a conventional branch-line coupler by a vertical line section as well as the distributed capacitors is presented to enhance the coupler bandwidths. Based on the proposed structure, the numerical solution derived from the even/odd-mode decomposition analysis for optimized bandwidth enhancement is applied for structural parameters. Experimental results show that the developed 90 degrees coupler demonstrates more than 11% return-loss/isolation bandwidth increase as compared to the conventional quadrature hybrid. Furthermore, the 3dB +/- 1dB magnitude- and 90 degrees +/- 5 degrees phase-difference bandwidths are 3% and 14% increased, respectively.
URI: http://hdl.handle.net/11536/22010
ISBN: 978-1-4577-1330-9
期刊: 2012 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC 2012)
起始頁: 989
結束頁: 991
顯示於類別:會議論文