WIRELESS TAG COMPOSITE ANTENNA

PROBLEM TO BE SOLVED: To provide a wireless tag which, even when worn by a user, can surely process reception and transmit a response.SOLUTION: A half-wavelength dipole antenna D is configured by coupling a wireless tag IC chip 4 to one long side 1 of an annular conductor 3 having parallel long side...

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Bibliographic Details
Main Authors AKAGI TADANORI, IWATA KAZUHISA, KOBAYASHI KIMITO, TOYODA JUNICHI
Format Patent
LanguageEnglish
Published 27.03.2014
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Summary:PROBLEM TO BE SOLVED: To provide a wireless tag which, even when worn by a user, can surely process reception and transmit a response.SOLUTION: A half-wavelength dipole antenna D is configured by coupling a wireless tag IC chip 4 to one long side 1 of an annular conductor 3 having parallel long sides 1 and short sides 2 and connecting in series a meander conductor 5 and a plate-shaped tip capacitance loading conductor 6 symmetrically disposed on the outside of each short side 2 to each of two power feeding points P and P on the other long side 1 divided into three almost equal sections. To this antenna including the long side 1 having the power feeding points P and P is contactlessly joined to one side L1 of a rectangular loop antenna L, or this one side L1 is conductively connected to the long side 1 having the power feeding points P and P. In this way, a magnetic-field wave in an electromagnetic wave transmitted and received by this loop antenna is added to an electric-field wave in an electromagnetic wave transmitted and received by the dipole antenna, whereby a wireless tag antenna is configured to be transmittable/receivable.
Bibliography:Application Number: JP20120199261