Arent Fox LLP
Auxiliary antenna, RFID system, and method for reading RFID tag
An auxiliary antenna is provided that enables communication between a small antenna of an RFID tag and an antenna of a reader device without using a small antenna as the antenna of the reader device. The auxiliary antenna is an auxiliary antenna configured to expand a communication range of an antenna of an RFID tag to enable communication between the small antenna included in the RFID tag and an antenna included in a reader device. The auxiliary antenna includes a resonance loop group in which a plurality of resonance loops having a resonance frequency corresponding to a communication frequency is arranged to be coupled through a magnetic field. Moreover, the resonance loop group has an antenna area larger than the antenna area of the antenna of the RFID tag and equivalent to or larger than the antenna area of the antenna of the reader device.
MURATA MANUFACTURING CO., LTD.
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Noboru Ryohei
Kato Omori