Theoretical analysis of center frequency and bandwidth tunable resonator employing coupled line and switches

Kunihiro Kawai, Hiroshi Okazaki, Shoichi Narahashi, Mizuki Motoyoshi, Noriharu Suematsu

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents a theoretical analysis of a tunable resonator using a coupled line and switches for the first time. The tunable resonator has the capability to tune its resonant frequency and bandwidth. The resonator has two suitable features on its tunable capability. The first feature is that the resonator retains its resonant frequency during bandwidth tuning. The second feature is that the on-state switch for tuning the bandwidth does not affect the insertion loss at the resonant frequency. These features are theoretically confirmed by its mathematically derived input impedance. The results from electromagnetic simulation and measurement of the fabricated tunable resonator also confirm these features. The fabricated tunable resonator changes the resonant frequency from 2.6 GHz to 6.4 GHz and bandwidth between 9% and 55%.

Original languageEnglish
Pages (from-to)612-621
Number of pages10
JournalIEICE Transactions on Electronics
VolumeE102C
Issue number8
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • Coupled line
  • Microstrip lines
  • Switches
  • Tunable resonators

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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