Reflector with frequency selective ring of absorptive material f

Details Reflector with frequency selective ring of absorptive material f Reflector with frequency selective ring of absorptive material f

1976-03-09

1978-06-20

Lieberman, Eli

Communications: radio wave antennas

Antennas

Wave guide type

343909, H01Q 912

Patent

active

040964833

ABSTRACT:
An antenna is made operative for two frequency bands, .DELTA.F.sub.B and .DELTA.F.sub.H, the latter higher than the former, by means of a frequency selective absorber, covering, in its edge region, a reflector of the antenna in order to reduce the diameter of the reflecting surface of the reflector and therefore the gain of the antenna for frequency band .DELTA.F.sub.H.

REFERENCES:
patent: 2460869 (1949-02-01), Braden
patent: 3101473 (1963-08-01), Fenlon
patent: 3156917 (1964-11-01), Parmeggiani
patent: 3314071 (1967-04-01), Lader et al.
patent: 3430245 (1969-02-01), Wolcott
patent: 3594804 (1971-07-01), Hersch et al.
patent: 3938152 (1976-02-01), Grimes et al.

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