Tunable stepped impedance resonator bandpass filter using ferroelectric materials

Tae Soon Yun, Hyun Suk Kim, Tae Seon Hyun, Sung Su Kwoun, Ho Gi Kim, Jong Chul Lee

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

3 Scopus citations

Abstract

In this paper, a stepped impedance resonator (SIR) bandpass filter using BST thin film as a tunable device has been discussed. For the analysis of relative dielectric constant of BST thin films, the BST interdigital capacitor (IDC) is fabricated with finger's width and gap of 10 fim and 5 μm, respectively, and the capacitance of IDC is 0.951 pF and the relative dielectric constant of BST thin film is 1,097 at 6 GHz. The tunable SIR bandpass filter using BST thin films is designed with coupling section of 22° and tapped feeding and has been successfully demonstrated with the thickness of BST thin films of 500 nm on the MgO substrate. The center frequency of the tunable SIR bandpass filter is moved from 6.15 GHz to 6.29 GHz at 50 V bias with about 3% bandwidth.

Original languageEnglish
Title of host publication2006 Asia-Pacific Microwave Conference Proceedings, APMC
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1773-1776
Number of pages4
ISBN (Print)4902339102, 9784902339109
DOIs
StatePublished - 2006
Event2006 Asia-Pacific Microwave Conference, APMC - Yokohama, Japan
Duration: 12 Dec 200615 Dec 2006

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC
Volume3

Conference

Conference2006 Asia-Pacific Microwave Conference, APMC
Country/TerritoryJapan
CityYokohama
Period12/12/0615/12/06

Keywords

  • BPF
  • BST
  • IDC
  • SIR

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