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:
Aug. 12, 2014
Filed:
Jun. 28, 2012
Makoto Higaki, Kanagawa, JP;
Ippei Kashiwagi, Tokyo, JP;
Shuichi Obayashi, Kanagawa, JP;
Hiroki Shoki, Kanagawa, JP;
Makoto Higaki, Kanagawa, JP;
Ippei Kashiwagi, Tokyo, JP;
Shuichi Obayashi, Kanagawa, JP;
Hiroki Shoki, Kanagawa, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
An antenna device of an embodiment includes: an antenna having a feeding point and an end portion apart from the feeding point, the end portion being an open end; a variable impedance matching circuit connected to the antenna at the feeding point; a probe placed in such a position that the distance from the end portion to a tip of the probe is equal to or shorter than one eighth of the wavelength corresponding to the maximum radio frequency used in the antenna device; and a controller that is connected to the probe, and controls the variable impedance matching circuit, based on an electrical signal measured with the probe.