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:
Feb. 28, 2006
Filed:
Sep. 10, 2003
Tatsuo Maeda, Kanagawa, JP;
Akihiko Yamagata, Kanagawa, JP;
Tatsuo Maeda, Kanagawa, JP;
Akihiko Yamagata, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
An antenna unit prevents a communication error by suppressing side lobes formed by an antenna coil segment of a reader/writer device. The antenna unit () is used for a reader/writer device () whose signal processing circuits () and () communicate with an IC card () via electromagnetic waves, wherein an antenna coil () of the IC card () relatively gets close to the antenna unit (). The antenna unit () includes the antenna coil segment which forms a loop antenna () on a substrate () and conductor segments () at the periphery of the antenna coil on substantially the same plane of the antenna coil.