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:
Apr. 25, 2017
Filed:
Jan. 28, 2010
Jun Koujima, Hiroshima-ken, JP;
Satoshi Ohmae, Hiroshima-ken, JP;
Tetsuya Kimura, Hiroshima-ken, JP;
Yoshiro Sato, Tokyo, JP;
Jun Koujima, Hiroshima-ken, JP;
Satoshi Ohmae, Hiroshima-ken, JP;
Tetsuya Kimura, Hiroshima-ken, JP;
Yoshiro Sato, Tokyo, JP;
TODA KOGYO CORPORATION, Hiroshima, JP;
Abstract
The present invention relates to an RF tag comprising a magnetic antenna for transmitting and receiving information using an electromagnetic induction method, and an IC mounted to the magnetic antenna, wherein the magnetic antenna comprises a magnetic core and a plurality of coils formed on the magnetic core; the coils each have an inductance Lsatisfying the specific relational formula, and are connected in parallel to each other in an electric circuit and disposed in series on the magnetic core; and a combined inductance Lof the magnetic antenna satisfies the specific relational formula. The RF tag of the present invention is used as a magnetic antenna for information communication using a magnetic field component which is capable of satisfying both reduction in size and improvement in communication sensitivity.