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US 8,552,916 B2Granted
Antenna and radio communication apparatus
AssigneeFujitsu Limited
InventorsMd. Golam. Sorwar Hossain, Takashi Yamagajo
Life of this patent
Estimating the term…
Abstract
An antenna includes a first arm whose one end is connected to a feeding unit, a second arm whose one end is connected to the first arm at a position that is away from the one end of the first arm and whose other end is connected to ground, and a variable impedance unit whose impedance is variable, provided between the ground and the other end of the first arm.
Claims3
An antenna comprising:
- a first arm unit whose one end is connected to a feeding unit;
- a resonance circuit with a variable impedance, whose one end is connected to another end of the first arm unit, and whose other end is connected directly to ground;
- a second arm unit whose one end is connected to the first arm unit at a position that is away from the one end of the first arm unit, the second arm unit having a plurality of other ends opposite to the one end connected to the first arm unit;
- and
- a switch bank unit placed between the second arm unit and the ground, the switch bank unit including a plurality of switches configured to selectively connect one of the plurality of other ends of the second arm unit to the ground,
- wherein the second arm unit and switch bank unit reside within a space enclosed by the first arm unit, resonance circuit, and ground.
3 more elements
A radio communication apparatus comprising:
- a first arm unit whose one end is connected to a feeding unit;
- a resonance circuit with a variable impedance, whose one end is connected to another end of the first arm unit, and whose other end is connected directly to ground;
- a second arm unit whose one end is connected to the first arm unit at a position that is away from the one end of the first arm unit, the second arm unit having a plurality of other ends opposite to the one end connected to the first arm unit;
- and
- a switch bank unit placed between the second arm unit and the ground, the switch bank unit including a plurality of switches configured to selectively connect one of the plurality of other ends of the second arm unit to the ground,
- wherein the second arm unit and switch bank unit reside within a space enclosed by the first arm unit, resonance circuit, and ground, and
- wherein the first arm unit, the second arm unit, the resonance circuit, switch bank unit, and the ground are formed on a single surface of a substrate.
4 more elements
Dependencies are inferred from the claim text.