Quarter-wave quarter-wave retractable antenna

Details Quarter-wave quarter-wave retractable antenna Quarter-wave quarter-wave retractable antenna

1997-09-10

2000-04-25

Wimer, Michael C.

Communications: radio wave antennas

Antennas

With radio cabinet

343895, H01Q 124

Patent

active

060549580

ABSTRACT:
Retractable antennas with quarter wave-quarter wave resonances for telephones, and which are particularly suitable for radiotelephones, include a retractable antenna with a top load element, a spatially separated rod element, and a cylindrical support conductor positioned therebetween. The cylindrical support conductor is structurally configured to receive a portion of the rod therein to add structural rigidity to the antenna and to define a coaxial capacitor between the rod and the conductor when the antenna is in the extended position.

REFERENCES:
patent: 5374937 (1994-12-01), Tsunekawa et al.
patent: 5583519 (1996-12-01), Koike
patent: 5661496 (1997-08-01), Baek et al.
patent: 5794158 (1998-08-01), Itoh
PCT International Search Report, PCT/US98/18819, Oct. 9, 1998.
Silver, S., Microwave Antenna Theory and Design, XP002087906, pp. 217-219 (1984).

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