Dual-band Bandpass Filter Based on Frequency Transformations with Enhanced Inter-band Isolation

Shao Chan Tang, Pei Cheng Chu, Jen Tsai Kuo, Lin Kun Wu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The coupling matrix approach is used to synthesize a dual-band filter. The two Chebyshev passbands are in close proximity and symmetric about a designated frequency, where two neighboring zeros are allocated for enhancing inter-band isolation. In the synthesis, two successive frequency transformations originated from lowpass domain are employed to establish the dual-band response. With the aid of source-load coupling, two extra zeros close to outer passband edges are further created to greatly improve the frequency selectivity. A microstrip filter is fabricated and tested for validation. Measured results show good agreement with simulation responses.

Original languageEnglish
Title of host publication2020 Asia-Pacific Microwave Conference, APMC 2020 - Proceeding
EditorsJie Sun, Wai Ho Yu
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages758-760
Number of pages3
ISBN (Electronic)9781728169620
DOIs
StatePublished - 8 Dec 2020
Event2020 Asia-Pacific Microwave Conference, APMC 2020 - Virtual, Hong Kong, Hong Kong
Duration: 8 Dec 202011 Dec 2020

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC
Volume2020-December

Conference

Conference2020 Asia-Pacific Microwave Conference, APMC 2020
CountryHong Kong
CityVirtual, Hong Kong
Period8/12/2011/12/20

Keywords

  • Dual-band filter
  • frequency transformation
  • inter-band isolation
  • microstrip
  • transmission zero

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