Ultra-compact shorted ring resonator bandpass filter with wide upper stopband

Tsu Wei Lin, Jen Tsai Kuo, Shyh Jong Chung

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

Abstract

An ultra-compact second-order bandpass filter with stopband extension is implemented with shorted ring resonators.In the design, the two resonances of the structure are separately controlled by electric and magnetic coupling between the rings. Two transmission zeros on both sides of the passband are created through the multipath effect between the I/O ports. Circuit miniaturization is accomplished by attaching an open low-impedance stub to each shorted ring. The upper stopband with a rejection better than 30 dB is extended to 4.32 times the passband frequency. The circuit area is only 8.8% of that of a conventional dual-mode ring resonator filter. Measured results show good agreement with the simulation.

Original languageEnglish
Title of host publication2014 Asia-Pacific Microwave Conference Proceedings, APMC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1145-1147
Number of pages3
ISBN (Electronic)9784902339314
StatePublished - 25 03 2014
Event2014 Asia-Pacific Microwave Conference, APMC 2014 - Sendai, Japan
Duration: 04 11 201407 11 2014

Publication series

Name2014 Asia-Pacific Microwave Conference Proceedings, APMC 2014

Conference

Conference2014 Asia-Pacific Microwave Conference, APMC 2014
Country/TerritoryJapan
CitySendai
Period04/11/1407/11/14

Bibliographical note

Publisher Copyright:
Copyright 2014 IEICE.

Keywords

  • Bandpass filter
  • Miniaturization
  • Ring resonator
  • Stopband extension
  • Transmission zero

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