Variable extended cable antenna for a cellular telephone

Details Variable extended cable antenna for a cellular telephone Variable extended cable antenna for a cellular telephone

1997-05-05

2000-01-25

Wong, Don

Communications: radio wave antennas

Antennas

With radio cabinet

343900, 343895, H01Q 124

Patent

active

060183217

ABSTRACT:
A variable extended cable antenna designed for cellular telephone use and which has two electrical functions; first, as a fully extended directly coupled helical top loaded 3/4 wave antenna and second, as a 1/4 wave helical antenna when it is recessed down into the cellular telephone.

REFERENCES:
patent: 4205319 (1980-05-01), Gasparaitis
patent: 4760401 (1988-07-01), Imazeki
patent: 4867698 (1989-09-01), Griffiths
patent: 5079558 (1992-01-01), Koike
patent: 5177492 (1993-01-01), Tomura et al.
patent: 5204687 (1993-04-01), Elliott et al.
patent: 5353036 (1994-10-01), Baldry
patent: 5469177 (1995-11-01), Rush et al.
patent: 5479178 (1995-12-01), Ha
patent: 5521605 (1996-05-01), Koike
patent: 5583519 (1996-12-01), Koike

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