Communications: radio wave antennas – Antennas – With aircraft
Patent
1979-12-14
1983-07-05
Lieberman, Eli
Communications: radio wave antennas
Antennas
With aircraft
343770, H01Q 128
Patent
active
043921396
ABSTRACT:
An omnidirectional VHF television antenna system for an aircraft which includes one pair of slot antennas on each side of the aircraft vertical fin. Each pair of antennas includes a VHF high band slot antenna and a VHF low band slot antenna. Due to co-channel interference the antenna system includes a left, right or omnidirectional azimuth response characteristic selectable by a cabin attendant through control of the antenna system antenna pattern select switch. The VHF low band slot antennas are tilted from the vertical by about 24.degree. and the VHF high band slot antennas are disposed vertically. Signal processing circuit means coupled between the slot antennas and the antenna system output terminal includes solid state switches to select antenna coverage omnidirectional and azimuth, or to the left or right of the aircraft to minimize ghosts or co-channel interference.
REFERENCES:
patent: 2908904 (1959-10-01), Vanatta et al.
patent: 3086204 (1963-04-01), Alford
patent: 3701161 (1972-10-01), Gregory
patent: 4162499 (1979-07-01), Jones et al.
Aoyama Frank S.
Stapleton Brian P.
Donahue B. A.
Gardner Conrad O.
Lieberman Eli
The Boeing Company
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