Antenna device having a matching means
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United States of America Patent
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-
Oct 26, 1999
Grant Date -
N/A
app pub date -
May 2, 1997
filing date -
May 3, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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