An ultra-wideband nested coaxial waveguide feed for reflector antenna applications

Author

Johns, S.L. ; Prata, A.

Author_Institution

Aerosp. Corp., El Segundo, CA, USA

Volume

1

fYear

1999

fDate

11-16 July 1999

Firstpage

704

Abstract

A 70:1 frequency bandwidth (0.6-42 GHz) four-cup ultra-wideband nested coaxial waveguide feed is designed and analyzed. The performance of the feed, when it illuminates an axially-symmetric paraboloidal reflector, is also presented and discussed. The numerical analysis is rigorously carried out using a body-of-revolution method of moments (MOM) computer code. A circularly polarized coaxial waveguide TE/sub 11/ mode is impressed at the shorted rear of each cup to provide excitation. In practice this circularly polarized TE(11), mode can be produced by four hybrid-excited probes in spatial quadrature and phase opposition.

Keywords

coaxial waveguides; electromagnetic wave polarisation; method of moments; probes; reflector antenna feeds; waveguide components; 0.6 to 42 GHz; MOM computer code; TE/sub 11/ mode; axially-symmetric paraboloidal reflector; body-of-revolution method of moments; circularly polarized coaxial waveguide mode; feed performance; frequency bandwidth; hybrid-excited probes; numerical analysis; phase opposition; reflector antenna applications; spatial quadrature; ultra-wideband nested coaxial waveguide feed; Bandwidth; Coaxial components; Feeds; Frequency; Message-oriented middleware; Moment methods; Numerical analysis; Polarization; Tellurium; Ultra wideband technology;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1999. IEEE

Conference_Location

Orlando, FL, USA

Print_ISBN

0-7803-5639-x

Type

conf

DOI

10.1109/APS.1999.789235

Filename

789235