Miniaturized microstrip quadruple-mode ring resonator filter with quasi-elliptic passband

Tsu Wei Lin, Jen Tsai Kuo, Shyh Jong Chung

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

Abstract

A compact quadruple-mode ring resonator is proposed for synthesis of a quasi-elliptic bandpass filter. The resonator is composed of four half-wavelength rings connected to a single grounded via. For miniaturization, the ring areas are overlapped and the crossovers are implemented by short CPW sections in the ground plane. As a result, the resonator uses about 50% area of a conventional dual-mode ring resonator filter. Among the four rings, all coupling coefficients are of inductive type realized by shorted high-impedance and coupledline sections. Two zeros are created by capacitive source-load coupling, and the response is synthesized by the coupling matrix method. Agreement between simulation and measurement results of a realized circuit validates the approach.

Original languageEnglish
Title of host publication2013 IEEE International Wireless Symposium, IWS 2013
DOIs
StatePublished - 2013
Event2013 IEEE International Wireless Symposium, IWS 2013 - Beijing, China
Duration: 14 04 201318 04 2013

Publication series

Name2013 IEEE International Wireless Symposium, IWS 2013

Conference

Conference2013 IEEE International Wireless Symposium, IWS 2013
Country/TerritoryChina
CityBeijing
Period14/04/1318/04/13

Keywords

  • coupling matrix
  • miniaturization
  • planar filter
  • quadruple-mode
  • quasi-elliptic function passband
  • ring resonator
  • source-load coupling

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