A hybrid finite-element method for axisymmetric waveguide-fed horns

Author

Chinn, Gilbert C. ; Epp, Larry W. ; Hoppe, Daniel J.

Author_Institution

Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA

Volume

44

Issue

3

fYear

1996

fDate

3/1/1996 12:00:00 AM

Firstpage

280

Lastpage

285

Abstract

A new method for finding radiation patterns and the reflection coefficients associated with an axisymmetric waveguide fed horn is presented. The approach is based on a hybrid finite element method (FEM) wherein the electromagnetic fields in the FEM region are coupled to the fields outside by two surface integral equations. Because of the local nature of the FEM, this formalism allows for the presence of inhomogeneities to be included in the problem domain. The matrix equation which results from the application of this method is shown to be complex-symmetric. Comparisons of calculated and measured data for two different horns show good agreement

Keywords

antenna feeds; antenna radiation patterns; antenna theory; electromagnetic wave reflection; finite element analysis; horn antennas; integral equations; matrix algebra; EM coupling; FEM region; axisymmetric waveguide-fed horns; electromagnetic fields; hybrid finite-element method; inhomogeneities; matrix equation; radiation patterns; reflection coefficients; surface integral equations; Antenna radiation patterns; Dielectrics; Electromagnetic coupling; Electromagnetic fields; Electromagnetic waveguides; Finite element methods; Integral equations; Propulsion; Reflection; Space technology;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.486294

Filename

486294