標題: A wideband bandpass filter with wide upper stopband using stepped-impedance cascadable 180 degrees hybrid rings
作者: Chi, Chun-Hsiang
Chang, Chi-Yang
電信工程研究所
Institute of Communications Engineering
關鍵字: phase inverter;stepped-impedance;vertically installed planar (VIP) coupler;wideband bandpass filter (BPF)
公開日期: 1-八月-2007
摘要: This letter proposes a wideband bandpass filter by cascading two 3-dB stepped-impedance. cascadable 180 degrees hybrid rings with a pair of stepped-impedance lines. Thanks to the stepped-impedance lines, a broad upper stopband is achieved. The stepped-impedance vertically installed planar (VIP) coupler is used to implement the ideal 180 degrees phase inverter and crossovers. The experimental results show that this 2-GHz center frequency, fourth order filter has a 10-dB return loss bandwidth of 92.5% and upper stopband rejection levels of better than -20 dB up to 6.8, GHz. This proposed filter achieves wide passband and broad stopband performance simultaneously.
URI: http://dx.doi.org/10.1109/LMWC.2007.901771
http://hdl.handle.net/11536/10503
ISSN: 1531-1309
DOI: 10.1109/LMWC.2007.901771
期刊: IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
Volume: 17
Issue: 8
起始頁: 589
結束頁: 591
顯示於類別:期刊論文


文件中的檔案:

  1. 000248520500013.pdf