Integration of Interresonator Coupling Structures with Applications to Filter Systems with Signal Route Selectivity

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

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This paper presents a positive-to-zero continuously tunable interresonator coupling structure for postloaded substrate-integrated cavity resonators. Two interresonator coupling structures with the opposite coupling signs were integrated. The continuously tunable negative microstrip line coupling structure can generate large enough coupling to cancel out the positive coupling by the inductive iris and accomplish near-zero coupling. The proposed structure was implemented on designing a tunable Butterworth-response filter of which the center frequency and bandwidth can be continuously adjusted. It was further applied to a six-resonator-array filter structure that essentially requires the zero coupling capability in order to acquire signal route selectivity. The two-, three-, and four-pole responses with different signal paths were measured within a frequency range, and for the two-pole case, two signals were simultaneously measured, while one signal is frequency tuned.

Original languageEnglish
Article number7516593
Pages (from-to)2790-2803
Number of pages14
JournalIEEE Transactions on Microwave Theory and Techniques
Volume64
Issue number9
DOIs
Publication statusPublished - 2016 Sep 1

Keywords

  • Bandpass filter
  • continuously tunable
  • zero coupling

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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