Communications: radio wave antennas – Antennas – Rod type
Patent
1988-08-03
1989-07-11
Hille, Rolf
Communications: radio wave antennas
Antennas
Rod type
343715, H01Q 110, H01Q 132
Patent
active
048476293
ABSTRACT:
An antenna assembly for use on a vehicle includes telescoping radiating sections that collapse toward an insulated mounting base, so that the radiating sections can be selectively extended. An impedance matching network with concentric outer and inner conductive tubular members slidably receives the telescopically collapsed radiating sections. Both tubular members are attached to the mounting base and electrically insulated therefrom and from each other. The inner tubular member is electrically connected to the radiating sections at a base end thereof. The outer tubular member has at least one longitudinal slot therein through which the central conductor of a transmission line is connected to the inner member. A ground contact is electrically connected to the outer tubular member. A slidable terminal that is selectively adjustable longitudinally along the outer tubular member is connected to the transmission line to select a signal insertion point.
REFERENCES:
patent: 3513472 (1970-05-01), Altmayer
patent: 4095229 (1978-06-01), Elliott
patent: 4280129 (1981-07-01), Wells
patent: 4675687 (1987-06-01), Elliott
patent: 4721965 (1988-01-01), Elliott
patent: 4725846 (1988-02-01), Hendershot
patent: 4734703 (1988-03-01), Nakase et al.
patent: 4764773 (1988-08-01), Larsen et al.
Alliance Research Corporation
Hille Rolf
Jodziewicz Matthew F.
Johnson Doris J.
Kleinberg Marvin H.
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