DocumentCode :
1854601
Title :
Theoretical study of the corrugated hard horn used as feed in multi-beam antennas for dual band operation at 20/30 GHz
Author :
Sotoudeh, O. ; Kildal, P.-S. ; Sipus, Z. ; Mangenot, C. ; Ingvarson, P.
Author_Institution :
Chalmers Univ. of Technol., Gothenburg, Sweden
Volume :
4
fYear :
2003
fDate :
22-27 June 2003
Firstpage :
506
Abstract :
We have demonstrated that in a cluster-fed reflector, a normal single-tuned hard horn can satisfy the usual -25 dB system requirements for the cross polarization over a large frequency band, but it cannot completely satisfy the requirements for the copolar level in the neighboring beam We have also tried larger reflector diameters than those presented here. In those cases, the beam isolation becomes better, but the 30 GHz footprint gets a dip in the center The reason for the dip is that the sidelobe of the feed is illuminating the reflector at 30 GHz. This may be improved for finite lengths of the horn, for which phase of the aperture field at the horn causes a beam broadening mainly at 30 GHz.
Keywords :
antenna radiation patterns; antenna theory; aperture antennas; horn antennas; mode matching; multifrequency antennas; reflector antenna feeds; 20 GHz; 30 GHz; aperture field; asymptotic corrugation boundary condition; bandwidth characteristics; beam broadening; beam isolation; circular horn; cluster-fed reflector; corrugated hard horn feed; cross polarization; dual band operation; large frequency band; modal field solution; multibeam antennas; radiating hard waveguides; single-tuned hard horn; spectral domain program; Aperture antennas; Boundary conditions; Directional antennas; Directive antennas; Dual band; Feeds; Frequency; Polarization; Satellite antennas; Space technology;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
Type :
conf
DOI :
10.1109/APS.2003.1220321
Filename :
1220321
Link To Document :
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