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. 17, 2010
Filed:
Sep. 27, 2007
Katsuyuki Kuramoto, Chigasaki, JP;
Katsuyuki Kuramoto, Chigasaki, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya-shi, Aichi-ken, JP;
Abstract
A radio-frequency tag communication device arranged to transmit a transmitted signal toward a radio-frequency tag and to receive a reply signal transmitted from the radio-frequency tag in response to the transmitted signal, for thereby effecting radio communication with the radio-frequency tag, the radio-frequency tag communication device including (a) a receiver portion including a receiver antenna device which has a plurality of receiver antenna elements for receiving the reply signal from the radio-frequency tag, (b) a reception-directivity control portion which controls the directivity of reception of the receiver portion device, by controlling the phase of a received signal which is received by each of the plurality of receiver antenna elements and which may include a leakage signal which is a part of the transmitted signal, (c) a modulated-component extracting portion which extracts a modulated component of the received signal which is modulated by the radio-frequency tag, and (d) a direction detecting portion which detects the direction in which the radio-frequency tag is located, on the basis of the modulated component extracted by the modulated-component extracting portion.