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A comparison of reflector antenna designs for wide‐angle scanning
Author(s) -
Zimmerman M.,
Lee S. W.,
Houshmand B.,
RahmatSamil Y.,
Acosta R.
Publication year - 1990
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.4650030703
Subject(s) - beamwidth , cassegrain antenna , fan beam antenna , reflector (photography) , optics , cassegrain reflector , parabolic reflector , periscope antenna , antenna (radio) , offset dish antenna , parabolic antenna , feed horn , antenna measurement , reduction (mathematics) , physics , engineering , telecommunications , mathematics , geometry , light source , telescope
Conventional reflector antennas are typically designed for up to ±20 beamwidths scan. In this paper, we try to stretch this scan range to some ± 300 beamwidths by varying various parameters of single‐ and dualreflector antennas. It is found that a symmetrical parabolic reflector with f/D = 2 and a single circular waveguide feed has the minimum scan loss (only 0.6 dB at θ 0 = 8°, or a 114 beamwidth scan). Reduction of antenna size by means of focal length folding (Cassegrain) of cluster feed implementation is discussed.