Antenna, and communication device using the same
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsSusumu Fukushima, Kazuhiko Sueoka, Motoharu Aoyama
Life of this patent
Estimating the term…
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.
Claims29
An antenna system comprising:
- a substrate;
- a ground provided on said substrate;
- a first radiator provided near a side of said substrate, said first radiator having a helical shape and having a central axis substantially in parallel to a side of said ground;
- and
- a high frequency circuit electrically coupled with a part of said first radiator.
An antenna system comprising:
- a first substrate;
- a first antenna on a first surface of said first substrate, said first antenna surrounding a first high frequency circuit provided on said first surface of said first substrate;
- a second antenna on said first surface of said first substrate, said second antenna adjoining said first antenna;
- first and second grounds on a second surface of said first substrate, said first and second grounds being opposed to said first high frequency circuit and said second antenna, respectively;
- and
- a connecting part for connecting said first and second grounds, said connecting part adjusting respective characteristics of said first and second antennas through being adjusted in shape.
An antenna system comprising:
- a multi-layer substrate having a first surface, a second surface, and a third surface, said first and second surfaces being external surfaces, said third surface being an internal surface;
- a first high frequency circuit on said first surface of said multi-layer substrate;
- a first antenna on said first surface of said multi-layer substrate, said first antenna surrounding said first high frequency circuit;
- a second antenna on said first surface of said multi-layer substrate, said second antenna adjoining said first antenna;
- first and second grounds on said third surface of said multi-layer substrate, said first and second grounds being opposed to said first high frequency circuit and said second antenna, respectively;
- and
- a connecting part for connecting said first and second grounds, said connecting part adjusting respective characteristic of said first and second antennas through being adjusted in shape.
Dependencies are inferred from the claim text.