A 2-step waveguide E-plane filter design method using the semi-discrete finite element method

Author

Crawford, Devin ; Davidovitz, Marat

Author_Institution

Dept. of Electr. Eng., Minnesota Univ., Minneapolis, MN, USA

Volume

42

Issue

7

fYear

1994

fDate

7/1/1994 12:00:00 AM

Firstpage

1407

Lastpage

1411

Abstract

The semidiscrete finite element method is used to design rectangular waveguide E-plane filters over a wide range of band-widths. First, a single filter element is characterized over the frequency range of interest by extracting lumped element values from the full-wave solution. A filter is then designed and optimized using the k-parameter method in which only first-order mode interaction between elements is considered. The filter response is then further refined by optimizing the full-wave response of the entire filter. This numerical technique exhibits excellent numerical convergence, with accuracy better that one percent with only 30 finite element nodes. Two filters were designed and their responses measured to verify the accuracy of the numerical technique

Keywords

cavity resonators; convergence of numerical methods; finite element analysis; microwave filters; passive filters; rectangular waveguides; waveguide components; FEM; filter design method; first-order mode interaction; full-wave response; k-parameter method; numerical convergence; numerical technique; rectangular waveguide E-plane filters; semi-discrete finite element method; Active filters; Band pass filters; Bandwidth; Design methodology; Finite element methods; Frequency; Microwave devices; Microwave filters; Microwave theory and techniques; Nonhomogeneous media;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.299737

Filename

299737