Antenna assembly for a wireless-communication device

Details Antenna assembly for a wireless-communication device Antenna assembly for a wireless-communication device

1995-09-29

1998-09-22

Le, Hoanganh T.

Communications: radio wave antennas

Antennas

With radio cabinet

343895, 343901, H01Q 124

Patent

active

058120939

ABSTRACT:
A retractable antenna assembly provides a substantially matched antenna impedance to a matching circuit (712) of a radiotelephone (200) whether the retractable antenna assembly is in the extended position or the retracted position. In one embodiment parts (304, 312) of a capacitor (714) are integrally formed on an upper portion of the retractable antenna assembly (206) such that when in the retracted position the capacitor (714) contributes to the overall antenna impedance. In another embodiment a capacitor (1302) is integrally formed on the lower portion of the retractable antenna assembly (900).

REFERENCES:
patent: 4860024 (1989-08-01), Egashira
patent: 5177492 (1993-01-01), Tomura et al.
patent: 5204687 (1993-04-01), Elliott et al.
patent: 5212491 (1993-05-01), Chin et al.
patent: 5317325 (1994-05-01), Bottomley
patent: 5353036 (1994-10-01), Baldry
patent: 5374937 (1994-12-01), Tsunekawa et al.
patent: 5438339 (1995-08-01), Itoh et al.
patent: 5467096 (1995-11-01), Takamoro et al.
patent: 5583519 (1996-12-01), Koike
patent: 5661496 (1997-08-01), Baek et al.

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