Compact 4-pole BRF-based directional filter with even-mode matching circuit for sharp cut-off

Jim S. Sun, Alonso Corona-Chavez, Jun Choi, Tatsuo Itoh

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

Abstract

The directional filter structure using λ/2 strip resonators with better filtering performance has been the focus of recent research activities. The band-reject filter based directional filter structure has been demonstrated as an effective way to achieve this goal. However, the prototype reported is cascading resonators in the lateral direction. When the order of the filer gets higher, the lateral cascading leads to rapid oscillation in the stop-band of S41 and a lengthy structure. This paper demonstrated a 4-pole band-reject filter based DF using direct-coupled band-reject filter. It achieves the highest order of DF response reported without the rapid oscillation in the stop-band. Yet it is about 30% smaller compared to previous 3-pole directional filter prototypes.

Original languageEnglish (US)
Title of host publication2013 IEEE MTT-S International Microwave Symposium Digest, MTT 2013
DOIs
StatePublished - Dec 1 2013
Event2013 IEEE MTT-S International Microwave Symposium Digest, MTT 2013 - Seattle, WA, United States
Duration: Jun 2 2013Jun 7 2013

Publication series

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

Other

Other2013 IEEE MTT-S International Microwave Symposium Digest, MTT 2013
CountryUnited States
CitySeattle, WA
Period6/2/136/7/13

Keywords

  • Band-reject filter
  • Band-stop filter
  • Compact directional filter
  • Directional filter
  • Multistage directional filter

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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  • Cite this

    Sun, J. S., Corona-Chavez, A., Choi, J., & Itoh, T. (2013). Compact 4-pole BRF-based directional filter with even-mode matching circuit for sharp cut-off. In 2013 IEEE MTT-S International Microwave Symposium Digest, MTT 2013 [6697604] (IEEE MTT-S International Microwave Symposium Digest). https://doi.org/10.1109/MWSYM.2013.6697604