Synthesis of Wideband Multicoupled Resonators Filters

Author

Meng, Wei ; Lee, Hong-Ming ; Zaki, Kawthar A. ; Atia, Ali E.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Maryland at Coll. Park, College Park, MD, USA

Volume

59

Issue

3

fYear

2011

fDate

3/1/2011 12:00:00 AM

Firstpage

593

Lastpage

603

Abstract

A method for the synthesis of multicoupled resonators filters with frequency-dependent couplings is presented. A circuit model of the filter that accurately represents the frequency responses over a very wide frequency band is postulated. The two-port parameters of the filter based on the circuit model are obtained by circuit analysis. The values of the circuit elements are synthesized by equating the two-port parameters obtained from the circuit analysis and the filtering characteristic function. Solutions similar to the narrowband case (where all the couplings are assumed frequency independent) are obtained analytically when all coupling elements are either inductive or capacitive. The synthesis technique is generalized to include all types of coupling elements. Several examples of wideband filters are given to demonstrate the synthesis techniques.

Keywords

equivalent circuits; frequency response; network synthesis; resonator filters; two-port networks; circuit analysis; circuit model; filtering characteristic function; frequency response; frequency-dependent couplings; two-port parameters; wideband multicoupled resonators filters; Circuit synthesis methods; coupling matrix; filter synthesis; microwave filters;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2010.2095032

Filename

5672815