Title :
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
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;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1999. IEEE
Conference_Location :
Orlando, FL, USA
Print_ISBN :
0-7803-5639-x
DOI :
10.1109/APS.1999.789235
