Title of Paper:Quad-band BPF based on SLRs with inductive source and load coupling

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Affiliation of Author(s):电子信息工程学院

Journal:ELECTRONICS LETTERS

Key Words:microstrip filters resonator filters band-pass filters UHF filters microwave filters quad-band BPF microstrip bandpass filter SLR stub-loaded resonators load coupling skirt selectivity improvement compact inductive source controllable transmission zeros quadruple passbands frequency 1 88 GHz frequency 2 55 GHz frequency 3 55 GHz frequency 5 15 GHz loss 1 53 dB loss 1 64 dB loss 1 79 dB loss 2 55 dB

Abstract:A quad-band microstrip bandpass filter (BPF) based on stub-loaded resonators (SLRs) with improved skirt selectivity is presented. A single metallic via hole in microstrip is utilised to introduce a compact inductive source-load coupling, with which two pairs of SLRs generate eight controllable transmission zeros at each side of all the quadruple passbands. As an example, a quad-band BPF with measured centre frequencies of 1.88, 2.55, 3.55 and 5.15 GHz as well as insertion losses of 1.53, 1.64, 1.79 and 2.55 dB, and respective fractional bandwidths of 4.38, 3.84, 3.44 and 2.9% is designed and fabricated. The measured response shows a good concordance with the simulated one.

ISSN No.:0013-5194

Translation or Not:no

Date of Publication:2017-04-13

Co-author:郭子均,魏香云,马羽,赵仁荣,邢可,伍磊

Correspondence Author:Liu Bing