Communications: radio wave antennas – Antennas – Wave guide type
Patent
1987-04-06
1989-04-11
Sikes, William L.
Communications: radio wave antennas
Antennas
Wave guide type
343772, 343776, 333 21A, H01Q 1300
Patent
active
048210463
ABSTRACT:
A dual frequency band microwave antenna feed for a parabolic reflector has a circular waveguide for a low frequency band and a smaller circular waveguide for a higher frequency band disposed in and concentric with the low band guide. A twisted conductive baffle is disposed in each guide to permit 90.degree. rotation of linearly cross-polarization signals and a pair of in-line ports is attached to each guide for output of such pairs of cross-polarization signals.
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"Antenna Engineering Handbook", 2d Ed. Johnson & Jasik, McGraw-Hill Book Co., pp. 42-30.
"Andrew Antenna Systems"--Circular Waveguide.
Le Hoang-anh
Sikes William L.
Wiggins Macdonald J.
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