Antenna device and wireless communication device using same

Details Antenna device and wireless communication device using same Antenna device and wireless communication device using same

2006-06-27

2006-06-27

Dinh, Trinh Vo (Department: 2821)

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

C343S816000, C343S793000, C343S795000

Reexamination Certificate

active

07068237

ABSTRACT:
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.

REFERENCES:
patent: 3925784 (1975-12-01), Phelan
patent: 4811032 (1989-03-01), Boksberger et al.
patent: 5134418 (1992-07-01), Gomez et al.
patent: 5294939 (1994-03-01), Sanford et al.
patent: 6175723 (2001-01-01), Rothwell, III
patent: 6198438 (2001-03-01), Herd et al.
patent: 6417807 (2002-07-01), Hsu et al.
IEEE International; Symposium, Antennas and Propagation Society, vol. 3, Jul. 8-13, 2001, pp. 654-657 “MEMS-Switched Reconfigurable Antenna” (William H. Weedon, et al.

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