Coupling matrix sign reversal transformation

Ranjan Das, Qingfeng Zhang, Abhishek Kandwal

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

Abstract

This paper explores a new transformation of coupling matrix (CM) called sign reversal technique. It is mathematically proved that, sign reversal transformation holds S-parameter invariant property by preserving eigen values and eigen vectors of original CM. It is also showed that, sign reversal operation offer another type of similarity transformation. Proposed sign reversal technique is independent of filter order and coupling topology. Also, this technique is equally applicable to resonating as well as non-resonating nodes which provide more degree of freedom for design. Two different lossless filter examples are examined to verify this technique. Finally, a 4th-order inline bandpass filter is designed and simulated to illustrate sign reversal technique in bandpass frequency domain.

Original languageEnglish
Title of host publication2018 IEEE MTT-S International Wireless Symposium, IWS 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-3
Number of pages3
ISBN (Electronic)9781538663462
DOIs
Publication statusPublished - 29 Jun 2018
Externally publishedYes
Event2018 IEEE MTT-S International Wireless Symposium, IWS 2018 - Chengdu, China
Duration: 6 May 20189 May 2018

Publication series

Name2018 IEEE MTT-S International Wireless Symposium, IWS 2018 - Proceedings

Conference

Conference2018 IEEE MTT-S International Wireless Symposium, IWS 2018
Country/TerritoryChina
CityChengdu
Period6/05/189/05/18

Keywords

  • coupling matrix (CM)
  • eigen value
  • lossless filter
  • S-parameter
  • Similar matrices
  • similarity transformation

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