Frequency compensating reflector antenna

Details Frequency compensating reflector antenna Frequency compensating reflector antenna

1979-10-11

1982-07-27

Moore, David K.

Communications: radio wave antennas

Antennas

Logarithmically periodic

343755, H01Q 1110

Patent

active

043420354

ABSTRACT:
A reflector antenna comprising a reflector system, and a feed system, for instance a log-periodic feed system, the phase center of which moves with frequency, for illuminating the reflector system to produce a substantially focussed antenna beam. To compensate for frequency variations in the position of the phase-center of the feed system, the reflector system includes a frequency dependent reflector the effective surface of reflection of which varies with frequency to cause the focus of the reflector system to move with the phase-center of the feed system. A number of different forms of suitable frequency dependent reflectors are described, employing composite arrangements frequency selective mesh or grid reflector elements, or arrays of reflecting horns or wedges.

REFERENCES:
patent: 2790169 (1957-04-01), Sichak
patent: 3148370 (1964-09-01), Bowman
patent: 3277490 (1966-10-01), Williams
patent: 3394378 (1968-07-01), Williams et al.
patent: 3649934 (1972-03-01), Matthaei et al.
patent: 3763493 (1973-10-01), Shimada et al.
patent: 4198639 (1980-04-01), Killion

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