Built-in whip antenna for a portable radio device

Details Built-in whip antenna for a portable radio device Built-in whip antenna for a portable radio device

2006-12-26

2006-12-26

Dinh, Trinh (Department: 2821)

Communications: radio wave antennas

Antennas

With radio cabinet

C343S790000

Reexamination Certificate

active

07154442

ABSTRACT:
An antenna assembly for a portable radio device/mobile station is provided. The assembly includes a retractable whip antenna24, a first radio lead50for coupling the whip antenna to a mobile telephony receiver, and a second radio lead48for coupling the whip antenna24to a FM or DVB receiver. Each lead is coupled to the whip antenna at least when the whip antenna is fully extended. In one embodiment, received signals are frequency discriminated by a RF choke such as an inductor52along the second radio lead. In another embodiment, the first radio lead is coupled directly to a PIFA antenna58internal to the portable device, and the whip antenna is in parasitic communication64with the PIFA antenna at least when the whip antenna is extended and receiving signals above a threshold frequency. In that alternative embodiment, the whip antenna is preferably decoupled from ground.

REFERENCES:
patent: 5089829 (1992-02-01), Haruyama et al.
patent: 5307078 (1994-04-01), Tanaka et al.
patent: 5606332 (1997-02-01), Darden et al.
patent: 6466173 (2002-10-01), Li
patent: 6486835 (2002-11-01), Wakeham
patent: 6611691 (2003-08-01), Zhou et al.
patent: 2004/0113849 (2004-06-01), Jarmuszewski et al.
patent: 2005/0243000 (2005-11-01), Hwang et al.

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