Full-wave analysis of coupling between cylindrical combline resonators

Author

Rong, Yu ; Zaki, Kawthar A.

Author_Institution

Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA

Volume

47

Issue

9

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

1721

Lastpage

1729

Abstract

The mode-matching method is applied to the analysis of couplings between cylindrical combline resonators, which are key building elements of combline filters. Finite iris thickness and higher order mode interactions are rigorously taken into account, thus allowing any size of rectangular coupling iris to be analyzed, and accurate solutions to he obtained. Validity of the approach is verified by checking the field distributions in the resonators and comparing the numerical results with HFSS and measurements. As an application of the analysis, a filter design example is demonstrated. Typical coupling curves of practical importance are presented, which can help in the design of combline filters

Keywords

cavity resonator filters; circular waveguides; comb filters; mode matching; combline filters; coupling curves; cylindrical combline resonators; field distributions; filter design; finite iris thickness; full-wave analysis; higher order mode interactions; mode-matching method; rectangular coupling iris; resonator coupling; Conductors; Costs; Finite element methods; Iris; Matched filters; Microwave filters; Microwave frequencies; Mode matching methods; Performance analysis; Resonator filters;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.788614

Filename

788614