Title :
The modified Gaussian beam as a simple near-zone reflector antenna feed model
Author :
Johns, S.L. ; Prata, A., Jr. ; Jenn, D.C.
Author_Institution :
Aerospace Corp., El Segundo, CA, USA
fDate :
June 28 1993-July 2 1993
Abstract :
The nature of the errors associated with the widely used far-zone feed models are investigated by comparing the radiated field against the exact field, at various observation distances, calculated by the spherical wave expansion (SWE) techniques. The proposed modified Gaussian-beam feed model is presented, and its near-zone accuracy is confirmed with results obtained using SWE. The improvement of the modified Gaussian-beam model over the far-zone feed model is shown on a typical reflector antenna geometry employing an axially symmetric hyperboloidal subreflector.<>
Keywords :
antenna radiation patterns; reflector antenna feeds; accuracy; axially symmetric hyperboloidal subreflector; modified Gaussian beam; near-zone reflector antenna feed model; spherical wave expansion; Antenna feeds; Antenna radiation patterns; Brain modeling; Electromagnetic modeling; Electromagnetic scattering; Gaussian processes; Maxwell equations; Radio frequency; Reflector antennas; Solid modeling;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1993. AP-S. Digest
Conference_Location :
Ann Arbor, MI, USA
Print_ISBN :
0-7803-1246-5
DOI :
10.1109/APS.1993.385228
