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US 7,068,237 B2Granted
Antenna device and wireless communication device using same
AssigneeNEC Corporation
InventorJunichi Fukuda
Life of this patent
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AssigneeNEC Corporation
InventorJunichi Fukuda
Estimating the term…
An antenna device is provided which is capable of dealing with two or more frequencies or of carrying out communications using two or more communication methods by a single antenna and of controlling its directivity and, therefore, of achieving improvements in communication performance of the antenna device. The antenna device is so constructed that its shape is freely changed and its directivity can be changed to deal with a signal in any frequency band. The antenna device is made up of two or more antenna elements and switches which put each of the antenna elements into a connected or disconnected state. By controlling the switches, a shape of the antenna is changed so as to have a 90-degree bent dipole configuration to provide directivity, and a length of the antenna is changed so as to allow a changeover of a frequency band. The antenna device has a reflector being similar to the dipole-type antenna, which enables improvements in its directivity.
An antenna device comprising:
A wireless communication device being equipped with an antenna device comprising a single matrix of two or more quadrangular antenna elements, and switches to control so as to put said antenna elements being adjacent to each other into an electrically connected or disconnected state, wherein a cross-dipole antenna having a 90-degree bent shape is formed by a group of said antenna elements being electrically connected to one another by said switches, and a signal feeding point, to which a signal line for inputting and outputting of signals is connected, is so configured to be changed in position on said single matrix by switching, as required.
Dependencies are inferred from the claim text.