Radio having replaceable and retractable antenna apparatus

Details Radio having replaceable and retractable antenna apparatus Radio having replaceable and retractable antenna apparatus

1995-02-21

1997-12-16

Le, Hoanganh T.

Communications: radio wave antennas

Antennas

With radio cabinet

343895, 343901, H01Q 124, H01Q 110, H01Q 136

Patent

active

056990707

ABSTRACT:
An antenna assembly (200) for use in a portable radio (100). The antenna assembly (200) includes first and second housings (113 and 203), a helical antenna (301) and a terminal (205). The first housing (113) is telescopically moveable with respect to the second housing (203) between a retracted and an extended position. The helical antenna (301) has a first dimension when the first housing (113) is moved to the first position and a second dimension when the first housing (113) is moved to the second position. The terminal (205) is coupled to the helical antenna (301) for replaceably coupling to the portable radio (100) by a user. Additionally, a pin (303), covered with a thickened solution (304), is disposed within the helical antenna (301)to dampen mechanical vibrations of the helical antenna (301) and a detenting mechanism retains the first housing (113) in the first and the second positions.

REFERENCES:
patent: 2214685 (1940-09-01), Stone, Jr.
patent: 3675616 (1972-07-01), McInnis
patent: 4087820 (1978-05-01), Henderson
patent: 4121218 (1978-10-01), Irwin et al.
patent: 4725845 (1988-02-01), Phillips
patent: 4868576 (1989-09-01), Johnson, Jr.
patent: 4920354 (1990-04-01), Rauser et al.
patent: 5168278 (1992-12-01), Morita
patent: 5243355 (1993-09-01), Emmert et al.
patent: 5258772 (1993-11-01), Inanaga et al.
patent: 5274393 (1993-12-01), Scott
Owner's Manual, AT&T Cordless Telephone 5500, 1988, #5242B, printed in Singapore, 1988.

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