Method and apparatus for bulk calibrating RFID tags
First Claim
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1. A method for simultaneously calibrating at least a first and a second radio frequency (“
- RF”
) identification tag, each tag being adapted to self-tune when exposed for at least a first period of time to an RF signal of a predetermined frequency and at least a first predetermined strength, the method comprising the steps of;
broadcasting an RF signal of said predetermined frequency and a second predetermined strength which is greater than said first predetermined strength;
simultaneously exposing said first and second tags to said broadcast signal such that the strength of said signal received by each of said tags is at least said first predetermined strength; and
continuing such exposure for a second period of time which is at least said first period of time.
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Abstract
A method and apparatus for bulk calibrating self-tuning radio frequency identification (“RFID”) tags wherein a plurality of the tags are simultaneously exposed to a broadcast RF signal of sufficient strength and for a sufficient period of time to assure self-calibration of all tags.
40 Citations
20 Claims
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1. A method for simultaneously calibrating at least a first and a second radio frequency (“
- RF”
) identification tag, each tag being adapted to self-tune when exposed for at least a first period of time to an RF signal of a predetermined frequency and at least a first predetermined strength, the method comprising the steps of;broadcasting an RF signal of said predetermined frequency and a second predetermined strength which is greater than said first predetermined strength; simultaneously exposing said first and second tags to said broadcast signal such that the strength of said signal received by each of said tags is at least said first predetermined strength; and continuing such exposure for a second period of time which is at least said first period of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- RF”
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11. Apparatus for simultaneously calibrating at least a first and a second radio frequency (“
- RF”
) identification tag, each tag being adapted to self-tune when exposed for at least a first period of time to an RF signal of a predetermined frequency and at least a first predetermined strength, the apparatus comprising;an RF transmitter adapted to produce an RF signal of said predetermined frequency and a second predetermined strength which is greater than said first predetermined strength; an antenna coupled to the transmitter and adapted to broadcast said RF signal; a structure adapted to support said first and second tags in proximity to said antenna so as to simultaneously expose said first and second tags to said broadcast signal such that the strength of said signal received by each of said tags is at least said first predetermined strength; and a timer adapted to continue such exposure for a second period of time which is at least said first period of time. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
- RF”
Specification