Multi-loop antenna for radio frequency identification (RFID) communication
First Claim
1. An antenna comprising a plurality of conductive loops to produce an electromagnetic field for radio frequency identification (RFID) communication with RFID tags, wherein the conductive loops are spaced apart at least a distance D that is selected based on a dimension of the RFID tags with which the antenna communicates.
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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.
85 Citations
24 Claims
- 1. An antenna comprising a plurality of conductive loops to produce an electromagnetic field for radio frequency identification (RFID) communication with RFID tags, wherein the conductive loops are spaced apart at least a distance D that is selected based on a dimension of the RFID tags with which the antenna communicates.
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12. A radio frequency identification (RFID) system comprising:
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an RFID tag associated with an article; and
an antenna having a plurality of conductive loops to produce an electromagnetic field for communication with the RFID tag, wherein the conductive loops are spaced at least a distance that is selected based at least in part on a dimension of the RFID tag. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification