Finite element analysis of axisymmetric radomes

Author

Gordon, Richard K. ; Mittra, Raj

Author_Institution

Dept. of Electr. Eng., Mississippi Univ., University, MS, USA

Volume

41

Issue

7

fYear

1993

fDate

7/1/1993 12:00:00 AM

Firstpage

975

Lastpage

981

Abstract

A two-step technique for the analysis of axisymmetric radomes is presented. Initially, an axisymmetric finite-element approach is employed, together with an absorbing boundary condition for mesh truncation, to determine the near fields scattered by an empty radome illuminated by a distant source. Next, the reciprocity theorem is invoked to determine the far-field pattern of an antenna encased by the radome, by computing the interaction between the current distribution on the antenna and the near-field data determined in the first step. The details of the formulation are presented along with numerical results for two different arrays enclosed by radomes of varying permittivities

Keywords

antenna accessories; antenna arrays; antenna radiation patterns; boundary-value problems; finite element analysis; mesh generation; absorbing boundary condition; axisymmetric radomes; current distribution; far-field pattern; finite-element approach; mesh truncation; numerical results; reciprocity theorem; scattered near field; two-step technique; Antenna theory; Boundary conditions; Current distribution; Distributed computing; Finite element methods; Geometrical optics; Helium; Maxwell equations; Moment methods; Optical scattering;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.237631

Filename

237631