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US 2005/0030243 A1Published application
Antenna and communication system using the same
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMasahiro Ohara, Shinji Kamaeguchi, Toru Arakawa
Life of this patent
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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 coil is operable to move at an inside of the coil. The antenna has a resonant frequency adjustable in a wide rage.
Claims11
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 coil being operable to move at an inside of the coil.
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 wound over a predetermined area of an outer surface of the first core, and
- a second core made of second magnetic material, the second coil being operable to move at an inside of the coil along the predetermined area of the first core;
- and
- a second communication device operable to communicate with the first communication device via the antenna.
4 more elements
Dependencies are inferred from the claim text.