Method for reading RFID tags using directional antennas
First Claim
1. A system for reading RFID tags in a high-density environment comprising:
- one or more of transmit antennas, each transmit antenna defining a highly directional antenna pattern;
one or more of receive antennas, each receive antenna defining a highly directional antenna pattern; and
wherein stepping said transmit and receive antennas in a circular fashion with respect to each other by pausing the transmit antenna'"'"'s antenna pattern during rotation while the receive antenna pattern sweeps across radiating antennas path produced by the transmit antenna such that the antenna patterns produced from each isolate and determine location of the RFID tags.
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Accused Products
Abstract
A method and system for reading RFID tags in a high-density environment using a directional scanning antenna system is provided. The directional scanning antenna system consists of transmit and receive antennas having highly directional antenna patterns which work together to read and locate the tags. In operation both types of antennas are stepped in a circular fashion with respect to each other wherein the transmit antenna'"'"'s antenna pattern pauses during rotation while the receive antenna pattern sweeps across the radiating antenna'"'"'s path produced by the transmit antenna such that the antenna patterns produced from each isolate and determine the location of the tags.
10 Citations
18 Claims
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1. A system for reading RFID tags in a high-density environment comprising:
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one or more of transmit antennas, each transmit antenna defining a highly directional antenna pattern; one or more of receive antennas, each receive antenna defining a highly directional antenna pattern; and wherein stepping said transmit and receive antennas in a circular fashion with respect to each other by pausing the transmit antenna'"'"'s antenna pattern during rotation while the receive antenna pattern sweeps across radiating antennas path produced by the transmit antenna such that the antenna patterns produced from each isolate and determine location of the RFID tags. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for reading RFID tags in a high-density environment comprising:
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transmitting highly directional antenna patterns produced by one or more transmit antennas; generating highly directional receive antenna patterns from one or more receive antennas; and stepping said transmit and receive antennas in a circular fashion with respect to each other by pausing the transmit antenna'"'"'s antenna pattern during rotation while the receive antenna pattern sweeps across radiating antennas path produced by the transmit antenna such that the antenna patterns produced from each isolate and determine location of the RFID tags. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A system for reading RFID tags in a high-density environment comprising:
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one or more radio frequency tags; a transmit antenna defining a highly directional antenna pattern whose highly directional pattern may illuminate said one or more radio frequency tags; a receive antenna defining a highly directional antenna pattern wherein stepping said receive antenna in a circular fashion with respect to said transmit antenna'"'"'s antenna pattern during rotation sweeps across radiating transmit antenna'"'"'s path produced by the transmit antenna such that the antenna patterns produced from each isolate and determine location of the RFID tags determining location of the RFID tags using triangulation techniques. - View Dependent Claims (16, 17, 18)
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Specification