UTD analysis of a shaped subreflector in a dual offset-reflector antenna system

Author

Lim, Kyutae ; Ryu, Hwang ; Lee, Sangseol ; Choi, Jaehoon

Author_Institution

Digital Commun. Lab., Samsung Adv. Inst. of Technol., Suwon, South Korea

Volume

46

Issue

10

fYear

1998

fDate

10/1/1998 12:00:00 AM

Firstpage

1555

Lastpage

1559

Abstract

The geometrical theory of diffraction (GTD) is known as an efficient high-frequency method for the analysis of electrically large objects such as a reflector antenna. However it is difficult to obtain geometrical parameters in order to apply GTD to an arbitrary shaped reflector, especially a subreflector. The geometrical parameters of an arbitrary shaped subreflector for the uniform theory of diffraction (UTD) analysis are derived based on differential geometry. The radiation patterns of various subreflector types, including hyperboloidal and a shaped subreflector, are evaluated by UTD. The computed result for the hyperboloidal reflector agrees well with that obtained by uniform asymptotic theory (UAT)

Keywords

antenna radiation patterns; differential geometry; geometrical theory of diffraction; offset reflector antennas; UTD analysis; arbitrary shaped reflector; arbitrary shaped subreflector; differential geometry; dual offset-reflector antenna system; efficient high-frequency method; electrically large objects; geometrical parameters; geometrical theory of diffraction; global interpolation; hyperboloidal subreflector; radiation patterns; shaped subreflector; uniform asymptotic theory; uniform theory of diffraction; Antenna radiation patterns; Antenna theory; Digital communication; Geometry; Laboratories; Pattern analysis; Physical optics; Physical theory of diffraction; Reflector antennas; Scattering parameters;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.725289

Filename

725289