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US 7,023,395 B2Granted
Antenna and communication system using the same
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMasahiro Ohara, Shinji Kamaeguchi, Toru Arakawa
Life of this patent
Estimating the term…
Abstract
An antenna includes a first core made of magnetic material, a coil including a conductive wire wound around a predetermined region of the first core, and a second core made of magnetic material. The second core is operable to move an inside of the coil. The antenna has a resonant frequency adjustable over a wide rage.
Claims30
An antenna comprising:
- a first core made of first magnetic material;
- a coil including a conductive wire having a portion wound around a predetermined region of the first core;
- and
- a second core made of second magnetic material, the second core being operable to move within an area between the portion of the conductive wire and the first core.
1 more element
A communication system comprising:
- a first communication device;
- an antenna connected to the first communication device, the antenna including
- a first core made of first magnetic material,
- a coil having a portion wound around a predetermined area of the first core, and
- a second core made of second magnetic material, the second core being operable to move within an area between the portion of the coil and the first core;
- and
- a second communication device operable to communicate with the first communication device via the antenna.
4 more elements
An antenna comprising:
- a first core made of first magnetic material;
- a coil including a conductive wire wound around a predetermined region of the first core;
- and
- a second core made of second magnetic material, the second core being operable to move inside of the coil,
- wherein the first core has a recess provided therein, and
- wherein the second core is operable to move in the recess of the first core.
3 more elements
A communication system comprising:
- a first communication device;
- an antenna connected to the first communication device, the antenna including
- a first core made of first magnetic material,
- a coil including a conductive wire wound around a predetermined region of the first core, and
- a second core made of second magnetic material, the second core being operable to move inside of the coil,
- wherein the first core has a recess provided therein, and
- wherein the second core is operable to move in the recess of the first core;
- and
- a second communication device operable to communicate with the first communication device via the antenna.
6 more elements
An antenna comprising:
- a first core made of first magnetic material;
- a coil including a conductive wire wound around a predetermined region of the first core;
- and
- a second core made of second magnetic material, the second core being operable to move inside of the coil,
- wherein the coil has a first region and a second region where the conductive wire is wound at a density larger than a density of the conductive wire at the first region.
2 more elements
A communication system comprising:
- a first communication device;
- an antenna connected to the first communication device, the antenna including
- a first core made of first magnetic material,
- a coil including a conductive wire wound around a predetermined region of the first core, and
- a second core made of second magnetic material, the second core being operable to move inside of the coil,
- wherein the coil has a first region and a second region where the conductive wire is wound at a density larger than a density of the conductive wire at the first region;
- and
- a second communication device operable to communicate with the first communication device via the antenna.
5 more elements
Dependencies are inferred from the claim text.