WIDE-ANGLE PROPERTIES OF DUAL-REFLECTOR ANTENNAS-EXPERIMENTAL.
Abstract
Two dual-reflector Cassegrain microwave systems were studied experimentally and theoretically for wide-angle performance at 9000 mc. The parabolic reflector diameter was 72 inches and the hyperbolic subdish diameter 14.4 inches in Case 1 (d/D = 0.2) and 21.6 inches in Case 2 (d/D = 0.3). In Case 1, a scan of 4 beamwidths off-axis was achieved with 3db drop in gain, in Case 2, 5 beamwidths. Sidelobe level on-axis for Case 1 was about 18db, for Case 2 about 14db. Scanning performance was in good agreement with theory. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1964
- Accession Number
- AD0608363
Entities
People
- Alan J Simmons
- Thomas C. Cahill