RF TAG, MAGNETIC ANTENNA, SUBSTRATE WITH THE RF TAG MOUNTED THEREON, AND COMMUNICATION SYSTEM

Title:

RF TAG, MAGNETIC ANTENNA, SUBSTRATE WITH THE RF TAG MOUNTED THEREON, AND COMMUNICATION SYSTEM

Document Type and Number:

WIPO Patent Application WO/2012/017921

Kind Code:

A1

Abstract:

The present invention relates to a magnetic antenna for communicating information, using magnetic field components. The magnetic antenna is a magnetic antenna or an RF tag which combines small size with improved communication sensitivity. In other words, the RF tag in which an IC is mounted on a magnetic antenna for transmitting and receiving information using an electromagnetic induction system is characterized in that said magnetic antenna is formed such that a plurality of coils wherein the inductance (L1) satisfies a specific relational expression are formed by bank winding on one magnetic core such that parasitic capacitance does not become large when the coils are being wound, said coils are connected in parallel on an electric circuit and are arranged in series on the magnetic core, and the synthesized inductance (L0) of the magnetic antenna satisfies a specific relational expression.

Inventors:

KOUJIMA JUN (JP)
OHMAE SATOSHI (JP)
SATO YOSHIRO (JP)

Application Number:

PCT/JP2011/067319

Publication Date:

February 09, 2012

Filing Date:

July 28, 2011

Export Citation:

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Assignee:

TODA KOGYO CORP (JP)
KOUJIMA JUN (JP)
OHMAE SATOSHI (JP)
SATO YOSHIRO (JP)

International Classes:

H01Q7/08; G06K19/07; G06K19/077

Domestic Patent References:

WO2010087413A1

2010-08-05

Foreign References:

JP2005033278A	2005-02-03
JP2009017593A	2009-01-22
JP2007295360A	2007-11-08
JP2007222235A	2007-09-06
JP2007019891A	2007-01-25
JPH0964634A	1997-03-07
JP2003332822A	2003-11-21
JP2004206479A	2004-07-22

Other References: