The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 31, 2006
Filed:
Feb. 14, 2005
Kyoichi Iigusa, Kyoto, JP;
Takuma Sawaya, Kyoto, JP;
Takashi Ohira, Kyoto, JP;
Hiroki Tanaka, Kyoto, JP;
Makoto Taromaru, Kyoto, JP;
Kyoichi Iigusa, Kyoto, JP;
Takuma Sawaya, Kyoto, JP;
Takashi Ohira, Kyoto, JP;
Hiroki Tanaka, Kyoto, JP;
Makoto Taromaru, Kyoto, JP;
Abstract
An array antenna apparatus includes a dielectric substrate, a feeder element, a parasitic element, and a directivity control unit. The feeder element and the parasitic element have an equal length. The feeder element and the parasitic element are arranged such that they intersect with each other at a substantially central portion of the parasitic element and a feeder unit of the feeder element and such that the parasitic elements are arranged symmetrically around the feeder element. An interval between the feeder element and the parasitic element is not larger than half wavelength of a radio wave. The parasitic element has a varactor diode serving as a variable capacitance element loaded. The directivity control unit supplies a control voltage to the varactor diode, and switches directivity of the array antenna apparatus.