WIRELESS COMMUNICATION-IMPROVING SHEET MEMBER, WIRELESS IC TAG, ANTENNA, AND WIRELESS COMMUNICATION SYSTEM USING THE SAME
First Claim
1. A wireless communication-improving sheet member that is used between a wireless IC tag and a communication-jamming member at the time of wireless communication with electric waves of a UHF band, an SHF band and an EHF band using an antenna for performing radio-wave-type communication near the communication-jamming member, and that improves wireless communication properties of the wireless IC tag when the wireless IC tag is disposed on an arrangement face without a wired connection of an IC chip provided in the wireless IC tag and an auxiliary antenna, comprising:
- a first spacer having the arrangement face, the first spacer being made of a non-conductive material;
an auxiliary antenna disposed on the first spacer on an opposite side to the arrangement face, the auxiliary antenna having a first conductor layer including a portion resonating with electromagnetic waves used in the wireless communication; and
a second spacer disposed on the auxiliary antenna on an opposite side to the first spacer with the first conductor layer interposed therebetween, the first spacer, the auxiliary antenna and the second spacer being stacked one on top of another;
a groove, an opening or a cutout being disposed in the first conductor layer of the auxiliary antenna.
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Accused Products
Abstract
In one embodiment of the present invention, an object of the invention is to provide a wireless communication-improving sheet member capable of increasing a possible communication distance of an IC tag for wireless communication, a wireless IC tag, an antenna, and a wireless communication system. A first spacer includes an arrangement face on which on which the wireless IC tag is disposed without a wired connection, and an auxiliary antenna is disposed on the first spacer on an opposite side to the arrangement face, the auxiliary antenna resonating with electromagnetic waves used in the wireless communication. The auxiliary antenna includes a first conductor layer as a resonant layer and a second spacer. The second spacer is disposed on an opposite side to the first spacer with the first conductor layer interposed therebetween. A discontinuous area is disposed in the first conductor layer of the auxiliary antenna. Thus, it is possible to not only eliminate influence of a communication-jamming member, but also increase received electrical power of a wireless IC tag (antenna), and ensure a long communication distance.
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Citations
20 Claims
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1. A wireless communication-improving sheet member that is used between a wireless IC tag and a communication-jamming member at the time of wireless communication with electric waves of a UHF band, an SHF band and an EHF band using an antenna for performing radio-wave-type communication near the communication-jamming member, and that improves wireless communication properties of the wireless IC tag when the wireless IC tag is disposed on an arrangement face without a wired connection of an IC chip provided in the wireless IC tag and an auxiliary antenna, comprising:
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a first spacer having the arrangement face, the first spacer being made of a non-conductive material; an auxiliary antenna disposed on the first spacer on an opposite side to the arrangement face, the auxiliary antenna having a first conductor layer including a portion resonating with electromagnetic waves used in the wireless communication; and a second spacer disposed on the auxiliary antenna on an opposite side to the first spacer with the first conductor layer interposed therebetween, the first spacer, the auxiliary antenna and the second spacer being stacked one on top of another; a groove, an opening or a cutout being disposed in the first conductor layer of the auxiliary antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification