RCS of waveguide cavities: a hybrid boundary-integral/modal approach

Author

Ling, Hao

Author_Institution

Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA

Volume

38

Issue

9

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

1413

Lastpage

1420

Abstract

A hybrid technique combining the flexibility of the boundary-integral method and the efficiency of the modal approach is presented. The technique is used for analyzing the electromagnetic scattering from open waveguide cavities. The generalized scattering matrices of the arbitrary waveguide discontinuity regions are determined using a boundary-integral equation formulation. The scattering matrix of the composite structure is found by cascading the scattering matrices of individual sections. The radar cross section of the open cavity is then calculated by a reciprocity formulation in conjunction with the Kirchoff´s approximation. Excellent agreements with the standard method of moments solution and with experimental data for offset bend structures are found. Examples of cavities with arbitrarily shaped and absorber-coated terminations are also presented

Keywords

electromagnetic wave scattering; radar cross-sections; waveguide components; Kirchoff´s approximation; RCS; absorber-coated terminations; arbitrary waveguide discontinuity regions; boundary-integral method; electromagnetic scattering; generalized scattering matrices; hybrid technique; modal approach; offset bend structures; open cavity; radar cross section; reciprocity formulation; waveguide cavities; Electromagnetic scattering; Electromagnetic waveguides; Frequency; Geometry; Integral equations; Planar waveguides; Radar cross section; Radar scattering; Rectangular waveguides; Transmission line matrix methods;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.56993

Filename

56993