Communications: radio wave antennas – Antennas – With radio cabinet
Patent
1983-04-29
1985-01-15
Lieberman, Eli
Communications: radio wave antennas
Antennas
With radio cabinet
343834, 343845, H01Q 148
Patent
active
044941200
ABSTRACT:
An antenna is provided which exhibits a low profile. The antenna includes a counterpoise of electrically conductive material and a passive element oriented substantially parallel thereto. The ends of the passive element are electrically coupled to the counterpoise surface. An active element of electrically conductive material includes a middle portion and first and second outer end portions. The middle portion is situated adjacent and spaced apart from the passive element by a predetermined distance and in a parallel relationship therewith. The first outer end portion of the active element is bent toward the grounded end of the passive element nearest thereto. The first outer end portion represents a feedpoint of the antenna with respect to the counterpoise. The remaining second outer end portion the active element is bent towards the remaining end of the passive element nearest thereto. The first and second outer portions by virtue of the bends which orient them close to the ends of the passive element result in coupling of substantial electromagnetic energy between the active element and a passive element. Substantial electromagnetic energy is radiated with both horizontal polarization and vertical polarization when the antenna is excited.
REFERENCES:
patent: 3155975 (1964-11-01), Chatelain
patent: 3184746 (1965-05-01), Chatelain
patent: 3283330 (1966-11-01), Chatelain
patent: 3366963 (1968-01-01), Goff
patent: 3488657 (1970-01-01), Pressel et al.
patent: 3573831 (1971-04-01), Forbes
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patent: 3696431 (1972-10-01), Holland
patent: 3808600 (1974-04-01), Bourdier
patent: 3984838 (1976-10-01), Voronoff
patent: 4070676 (1978-01-01), Sanford
Frink, Jr., Abstract No. 656,243, Antenna, published Dec. 20, 1949, 370 O.G. 757.
Downey Joseph T.
Gillman James W.
Lieberman Eli
Motorola Inc.
Roney Edward M.
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