Communications: radio wave antennas – Antennas – With spaced or external radio wave refractor
Patent
1982-11-23
1985-01-01
Lieberman, Eli
Communications: radio wave antennas
Antennas
With spaced or external radio wave refractor
343778, 343376, H01Q 1906, H01Q 346, H01Q 128
Patent
active
044918453
ABSTRACT:
An antenna assembly configured by the combination of the high forward gain of a conventional planar phased array antenna with the wide angle scanning capability of a dome antenna. The invention includes an optically fed phased array, which may be structurally configured similar to a conventional lens array, but comprises a reflection/transmission switch and an electronic phase shifter at each radiating element. The switches facilitate operation of the phased array in two distinct modes; when the switches are set for the transmission mode, the phased array operates substantially as a conventional lens array to scan a .+-.60.degree. conical sector; when the switches are set for the reflection mode, the phased array behaves like a reflect array to scan an additional .+-.60.degree. to .+-.120.degree. sector.
REFERENCES:
patent: Re28217 (1974-10-01), Malech
patent: 3484784 (1969-12-01), McLeod, Jr.
patent: 3524188 (1970-08-01), Bowman
patent: 3550139 (1970-12-01), McFarland
patent: 3755815 (1973-08-01), Stangel
patent: 4070678 (1978-01-01), Smedes
Franz Bernard E.
Lieberman Eli
Singer Donald J.
The United States of America as represented by the Secretary of
Wimer Michael C.
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