Antenna, and communication device using the same

Details Antenna, and communication device using the same Antenna, and communication device using the same

2006-05-02

2006-05-02

Dinh, Trinh (Department: 2821)

Communications: radio wave antennas

Antennas

Spiral or helical type

Reexamination Certificate

active

07038635

ABSTRACT:
An antenna system includes a substrate, a ground on the substrate, a first radiator having a helical shape near a side of the substrate and having a central axis substantially in parallel to a side of the ground, and a high frequency circuit electrically connected to a part of the first radiator. In the antenna system, ground-induced degradation of antenna gain can be reduced, and matching can be performed at an operating frequency through adjustment of a winding of the first radiator. Consequently, the radiation gain of the antenna system can be improved without an antenna matching circuit.

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