Capacitive RFID tag encoder
First Claim
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1. A system, comprising:
- a first conductive element;
a second conductive element; and
a capacitive encoder adapted to drive the first conductive element with a first RF signal and to drive the second conductive element with a second RF signal, wherein the second RF signal is out of phase with the first RF signal by a predetermined phase so as to capacitively excite an RFID tag in proximity to the first and second conductive elements.
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Abstract
In one embodiment, a capacitive encoding system is provided that includes a first conductive element; a second conductive element; and a capacitive encoder adapted to drive the first conductive element with a first RF signal and to drive the second conductive element with a second RF signal, wherein the second RF signal is out of phase with the first RF signal by a predetermined phase so as to capacitively excite an RFID tag in proximity to the first and second conductive elements.
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Citations
15 Claims
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1. A system, comprising:
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a first conductive element;
a second conductive element; and
a capacitive encoder adapted to drive the first conductive element with a first RF signal and to drive the second conductive element with a second RF signal, wherein the second RF signal is out of phase with the first RF signal by a predetermined phase so as to capacitively excite an RFID tag in proximity to the first and second conductive elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for communicating with an RFID tag, the method comprising:
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placing a capacitive encoder having first conductive element and a second conductive element in proximity of the RFID tag;
driving the first conductive element with a first RF signal; and
driving the second conductive element with a second RF signal that is out of phase with the first RF signal by a predetermined phase so as to capacitively excite the RFID tag. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification