Distributed-element absorptive bandpass filter with a broadband impedance matching

Jongheun Lee, Seunggoo Nam, Juseop Lee

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

Abstract

In this paper, we present a new method for designing absorptive bandpass filters using coupled lines. The new design method and filter structure allow an absorptive bandpass filter to have good impedance matching performance over a wider frequency range in comparison with distributed-element absorptive filters reported in the literature. Closed form design equations are provided so that a filter can be designed in a way to produce a target frequency response. For verifying the presented design approach, a second-order absorptive bandpass filter centered at 2 GHz having 10% fractional bandwidth has been designed, fabricated, and measured. The measurement shows that the return losses (S11 and S22) are overall larger than 10 dB from DC to 3 f0.

Original languageEnglish
Title of host publicationIMS 2020 - 2020 IEEE/MTT-S International Microwave Symposium
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages912-915
Number of pages4
ISBN (Electronic)9781728168159
DOIs
Publication statusPublished - 2020 Aug
Event2020 IEEE/MTT-S International Microwave Symposium, IMS 2020 - Virtual, Los Angeles, United States
Duration: 2020 Aug 42020 Aug 6

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
Volume2020-August
ISSN (Print)0149-645X

Conference

Conference2020 IEEE/MTT-S International Microwave Symposium, IMS 2020
CountryUnited States
CityVirtual, Los Angeles
Period20/8/420/8/6

Keywords

  • Absorptive filters
  • Distributed-element filters

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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