Antenna device, method and program for controlling directivity of the antenna device, and communications apparatus
AssigneeFujitsu Limited
InventorShin Watanabe
Life of this patent
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Abstract
The present invention relates to an antenna device and enables the directivity of an antenna element to be changed without affecting the resonance frequency of the antenna element. The antenna device comprises a first grounded conductor, an antenna element mounted on the first grounded conductor via an insulator, a second grounded conductor disposed separate from the first grounded conductor, and a changing unit for changing directivity of the antenna element by adding the second grounded conductor to the first grounded conductor or canceling the addition thereof.
Claims6
An antenna device comprising:
- a first grounded conductor;
- an antenna element mounted on the first grounded conductor via an insulator;
- a plurality of second grounded conductors disposed separate from the first grounded conductor;
- an azimuth detection unit which detects azimuth;
- and
- a control unit which controls directivity of the antenna element by adding the second grounded conductor to the first grounded conductor or canceling the addition thereof in consideration of information on azimuth detected by the azimuth detection unit.
A directivity control method for an antenna device, comprising the steps of:
- loading azimuth information;
- and
- changing directivity of an antenna element by adding a second grounded conductor to a first grounded conductor juxtaposed to the antenna element or canceling the addition thereof in consideration of the loaded azimuth information.
A directivity control program for an antenna device, the program causing an information processing unit disposed adjacent to an antenna device to execute the steps of:
- loading azimuth information;
- and
- changing directivity of the antenna element by adding a second grounded conductor to a first grounded conductor juxtaposed to the antenna element or canceling the addition thereof in consideration of the loaded azimuth information.
A communications apparatus comprising:
- a first grounded conductor;
- an antenna element mounted on the first grounded conductor via an insulator;
- a plurality of second grounded conductors disposed separate from the first grounded conductor;
- an azimuth detection unit which detects azimuth;
- and
- a control unit which controls directivity of the antenna element by adding the second grounded conductor to the first grounded conductor or canceling the addition thereof in consideration of azimuth information detected by the azimuth detection unit.
Dependencies are inferred from the claim text.