A reconfigurable filter based on doublet configuration

Ching Ku Liao*, Chi-Yang Chang, Jenshan Lin

*Corresponding author for this work

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

18 Scopus citations

Abstract

A surrogate model is proposed to model a previously published second-order tunable filter. The surrogate model can be represented by a coupling matrix in a doublet configuration, and a simple method based on the even-odd mode bisection is given to extract the coupling matrix. From the extracted parameters, one can decide how to design a filter with prescribed quasi-elliptic responses and how to adjust varactors to reconfigure the response. Using the proposed methods, the second-order filter can be configured to have a finite transmission zero on either the lower side or the upper side of the passband in a prescribed location even when the center frequency of the filter is tuned. Both simulated and measured results of an example are presented.

Original languageEnglish
Title of host publication2007 IEEE MTT-S International Microwave Symposium Digest
Pages1607-1610
Number of pages4
DOIs
StatePublished - 2 Oct 2007
Event2007 IEEE MTT-S International Microwave Symposium, IMS 2007 - Honolulu, HI, United States
Duration: 3 Jun 20078 Jun 2007

Publication series

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

Conference

Conference2007 IEEE MTT-S International Microwave Symposium, IMS 2007
CountryUnited States
CityHonolulu, HI
Period3/06/078/06/07

Keywords

  • Coupling matrix
  • Electrically tunable filter
  • Frequency control
  • Planar filter
  • Reconfigurable filter

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  • Cite this

    Liao, C. K., Chang, C-Y., & Lin, J. (2007). A reconfigurable filter based on doublet configuration. In 2007 IEEE MTT-S International Microwave Symposium Digest (pp. 1607-1610). [4264154] (IEEE MTT-S International Microwave Symposium Digest). https://doi.org/10.1109/MWSYM.2007.379993