Fast Boundary Contour Mode-Matching Method for the CAD of Circular Post Coupled Resonator Filters

Author

Boettger, A. ; Sieverding, Th. ; Krauss, P. ; Arndt, F.

Author_Institution

Microwave Department, University of Bremen, P.O. Box 330 440, Kufsteiner Str. NW1, D-28359, Bremen, Germany, Fax: +49 (421) 218-7330

Volume

1

fYear

1998

fDate

Oct. 1998

Firstpage

712

Lastpage

715

Abstract

A new direct boundary contour mode-matching method is presented for the efficient calculation of the modal scattering matrix of rectangular waveguide structures with obstacles of shaped contours in the H-plane. Based immediately on the analytically given rectangular waveguide eigenfunctions, the coupling integrals along the inhomogeneous cross-section contour are calculated by a simple weighted GAUSSIAN quadrature. The efficiency of the method is demonstrated at the fast CAD of asymmetric and double circular post coupled rectangular waveguide resonator filters. The starting values for the optimization are advantageously calculated by a modal COHN synthesis. Reference values verify the theory by excellent agreement.

Keywords

Eigenvalues and eigenfunctions; Microwave theory and techniques; Mode matching methods; Planar waveguides; Rectangular waveguides; Resonator filters; Scattering; Waveguide components; Waveguide discontinuities; Waveguide theory;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 1998. 28th European

Conference_Location

Amsterdam, Netherlands

Type

conf

DOI

10.1109/EUMA.1998.338074

Filename

4139161