Multi-loop antenna for radio frequency identification (RFID)...

Details Multi-loop antenna for radio frequency identification (RFID)... Multi-loop antenna for radio frequency identification (RFID)...

2004-02-20

2008-08-26

Ho, Tan (Department: 2821)

Communications: radio wave antennas

Antennas

Loop type

C343S742000, C340S572700

Reexamination Certificate

active

07417599

ABSTRACT:
A multi-loop antenna is described having a plurality of conductive loops to produce an electromagnetic field for radio frequency identification (RFID) communication with RFID tags. The conductive loops are spaced apart at least a distance that is selected based on a dimension of the RFID tags with which the antenna communicates. In this manner, the loops are positioned and spaced in a manner that reduces the size of the holes within the resulting magnetic field. In addition, the configuration of the described dual-loop antenna increases the coverage of the antenna, and decreases inter-winding capacitance, thereby increasing overall read range achieved by the antenna.

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