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. 30, 2012
Filed:
Feb. 23, 2009
Yoshihiro Kanasaki, Sendai, JP;
Haruhiko Kakitsu, Sendai, JP;
Yoshihiro Kanasaki, Sendai, JP;
Haruhiko Kakitsu, Sendai, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A portable wireless device that makes it possible to maintain any desired matching state and can suppress an increase in the loss accompanying matching if the impedance characteristic of an antenna changes with expansion/storage of the antenna, deformation of a housing, etc., is provided. Two channels of signal paths that can be selected by switch sectionare provided between an antennaand a reception circuit; a first low noise amplifierthat can amplify a received high frequency signal is provided in one path and a second low noise amplifierhaving an impedance characteristic different from the low noise amplifieris provided in the other signal path. The form of the antennaor the form of a housing is detected in a form change detection sectionand the two channels of signal paths are automatically switched in a control section and two types of impedance matching states are used properly.