Antenna device having a matching means

Details Antenna device having a matching means Antenna device having a matching means

1997-05-02

1999-10-26

Wong, Don

Communications: radio wave antennas

Antennas

With radio cabinet

343850, 343872, 343895, H01Q 124

Patent

active

059736461

ABSTRACT:
An antenna device is disclosed, which is intended for a portable radio communication device, in particular a pocket size cellular telephone. The novel antenna device includes a housing (1) having mounting means (2) for mounting on the telephone (3), helically configured first radiator (4) carried by the housing, and an impedance matching means (6) formed by reactive components on a dielectric substrate provided with a printed circuit pattern. The matching means is carried by the housing and it matches an impedance of the first radiator to an impedance of transceiver circuitry of the telephone. The antenna device may include one or more radiators in addition to the first radiator. The disclosed antenna means is particularly advantageous when the antenna device includes at least one radiator of half-wave type.

REFERENCES:
patent: 4868576 (1989-09-01), Johnson
patent: 5198831 (1993-03-01), Burrell et al.
patent: 5212491 (1993-05-01), Chin et al.
patent: 5300940 (1994-04-01), Simmons
patent: 5335368 (1994-08-01), Tamura
patent: 5365247 (1994-11-01), Veen et al.
patent: 5367311 (1994-11-01), Egashira et al.
patent: 5594461 (1997-01-01), O'Neill
Diagram of RA3137, Allgon AB Sweden, 1993.

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