Antenna device and wireless communication apparatus
AssigneeKabushiki Kaisha Toshiba
InventorsMakoto Higaki, Ippei Kashiwagi, Shuichi Obayashi, Hiroki Shoki
Life of this patent
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Abstract
An antenna device of an embodiment includes: an antenna having a feeding point and an end portion apart from the feeding point, the end portion being an open end; a variable impedance matching circuit connected to the antenna at the feeding point; a probe placed in such a position that the distance from the end portion to a tip of the probe is equal to or shorter than one eighth of the wavelength corresponding to the maximum radio frequency used in the antenna device; and a controller that is connected to the probe, and controls the variable impedance matching circuit, based on an electrical signal measured with the probe.
Claims20
An antenna device comprising:
- an antenna having a feeding point and an end portion apart from the feeding point, the end portion being an open end;
- a variable impedance matching circuit connected to the antenna at the feeding point;
- a probe placed in such a position that a distance from the end portion to a tip of the probe is equal to or shorter than one eighth of a wavelength corresponding to a maximum radio frequency used in the antenna device;
- and
- a controller controlling the variable impedance matching circuit based on an electrical signal measured with the probe, the controller being connected to the probe.
A wireless communication apparatus comprising
- an antenna device and a wireless device,
- the antenna device comprising:
- an antenna having a feeding point and an end portion apart from the feeding point, the end portion being an open end;
- a variable impedance matching circuit connected to the antenna at the feeding point;
- a probe placed in such a position that a distance from the end portion to a tip of the probe is equal to or shorter than one eighth of a wavelength corresponding to a maximum radio frequency used in the antenna device;
- and
- a controller controlling the variable impedance matching circuit based on an electrical signal measured with the probe, the controller being connected to the probe,
- the wireless device being connected to the opposite side of the variable impedance matching circuit from the antenna.
Dependencies are inferred from the claim text.