High Selectivity Cascaded Quadruplet Bandpass Filter with Three Pairs of Transmission Zeros. Issue 5 (1st September 2017)

• Record Type: Journal Article
• Authors: Chen, Jianfeng; Chen, Fuchang; Li, Runshuo; Xie, Zeming; Chu, Qingxin
• Is Part Of: Chinese journal of electronics. Volume 26:Issue 5(2017)
• Page Start: 1101
• Page End: 1104
• Publication Date: 2017-09-01
• Subjects: Cascaded quadruplet (CQ) -- Bandpass filter -- Cross coupling -- Transmission zeros -- Microstrip.; band‐pass filters -- microstrip filters -- microwave filters -- poles and zeros -- resonator filters; high selectivity cascaded quadruplet bandpass filter -- transmission zeros -- microstrip Cascaded quadruplet bandpass filter -- three‐quarter wavelength resonators -- frequency 3.0 GHz; Electronics -- Periodicals; Electronics -- China -- Periodicals; Electronics; China; Periodicals; 621.38105
• DOI: 10.1049/cje.2017.07.017
• Languages: English
• ISSNs: 1022-4653

Abstract

Abstract : A novel microstrip Cascaded quadruplet (CQ) bandpass filter using quarter wavelength resonators and three‐quarter wavelength resonators is proposed. Based on cross coupling and source‐load coupling, three pairs of finite transmission zeros are generated at the stopband. As a result, the out‐of‐band rejection can be enhanced and high selectivity is achieved. Based on the proposed structure, a cascaded quadruplet filter centering at 3.0GHz is designed and fabricated. Good agreement between the measured and simulated data is obtained.