Positive-to-zero continuously tunable inter-resonator coupling structure for applications in filter array systems

Beyoungyoun Koh, Boyoung Lee, Seunggoo Nam, Ju Seop Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

This paper presents a novel positive-to-zero continuously tunable inter-resonator coupling structure for high Q substrate-integrated waveguide resonators. Two nearly nonmutually coupled distinct inter-resonator structures were integrated. One structure provides positive static inter-resonator coupling while the other composes a continuously tunable negative coupling. The negative coupling can be tuned to be large enough to cancel out the static positive coupling and create a near-zero inter-resonator coupling state. Using the proposed tunable structure, a second-order continuously tunable Butterworth filter has been designed and fabricated. The bandwidth of the fabricated filter can be tuned from 3% to 0% at 1.3 GHz. Similar tuning is possible for all frequencies within the frequency range 0.95 GHz ∼ 1.6 GHz. The fabricated filter has been measured to have frequency tuning ratio of 1.7:1.

Original languageEnglish
Title of host publication2015 IEEE MTT-S International Microwave Symposium, IMS 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781479982752
DOIs
Publication statusPublished - 2015 Jul 24
EventIEEE MTT-S International Microwave Symposium, IMS 2015 - Phoenix, United States
Duration: 2015 May 172015 May 22

Other

OtherIEEE MTT-S International Microwave Symposium, IMS 2015
CountryUnited States
CityPhoenix
Period15/5/1715/5/22

Keywords

  • Band-pass filters
  • Microwave circuits
  • Resonator filters

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing
  • Electrical and Electronic Engineering

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    Koh, B., Lee, B., Nam, S., & Lee, J. S. (2015). Positive-to-zero continuously tunable inter-resonator coupling structure for applications in filter array systems. In 2015 IEEE MTT-S International Microwave Symposium, IMS 2015 [7166835] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MWSYM.2015.7166835