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:
Jan. 16, 2018
Filed:
Nov. 18, 2015
Sharp Kabushiki Kaisha, Sakai, Osaka, JP;
SHARP KABUSHIKI KAISHA, Sakai, Osaka, JP;
Abstract
A communication device including a device-side antennafor wireless communication with an IC cardincluding a card-side antennawound in a rectangular form. The antennais formed in one or multiple loops. During the wireless communication with the IC cardhaving an inner perimeter with a long dimension of 69 mm and a short dimension of 38 mm at a distance of 25 mm, an inner perimeter of the antennais formed at a position at which intensity H of a magnetic field produced by the card-side antennain a direction perpendicular to a surface on which the antennais disposed is in a range expressed by inequation (1):0.037/4Π<<0.063/4Π  (1)where I is a current of the card-side antenna [A] and Π is pi.