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:
Sep. 03, 2013
Filed:
Jul. 08, 2009
Wataru Noguchi, Hyogo, JP;
Hiroyuki Yurugi, Osaka, JP;
Masahiko Nagoshi, Osaka, JP;
Sotaro Shinkai, Osaka, JP;
Akihiko Shiotsuki, Osaka, JP;
Wataru Noguchi, Hyogo, JP;
Hiroyuki Yurugi, Osaka, JP;
Masahiko Nagoshi, Osaka, JP;
Sotaro Shinkai, Osaka, JP;
Akihiko Shiotsuki, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A variable directivity antenna apparatus is configured to include a parasitic element, a plurality of antenna elements each provided to be away from the parasitic element by an electrical length of a quarter-wavelength, and a PIN diode connected to the parasitic element and changing over whether or not to ground the parasitic element. A radiation pattern from the variable directivity antenna apparatus is changed by outputting a control signal for changing over whether or not the parasitic element operates as a parasitic element by selectively turning on or off the PIN diode.