Methods and systems of RFID tags using RFID circuits and antennas having unmatched frequency ranges
First Claim
Patent Images
1. A radio frequency identification (RFID) tag comprising:
- a RFID circuit configured to operate in a first range of resonant frequencies;
a tag antenna coupled to the RFID circuit, the tag antenna having a range of resonant frequencies different than the first range of resonant frequencies, the range of resonant frequencies of the tag antenna being a second range of resonant frequencies; and
a rectifier circuit coupled between the RFID circuit and the tag antenna, wherein the rectifier circuit is configured to be operable at the second range of resonant frequencies and enables the RFID circuit to operate in the second range of resonant frequencies.
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Abstract
Methods and systems of RFID tags using RFID circuits and antennas having unmatched frequency ranges. At least some of the illustrative embodiments are RFID tags comprising a RFID circuit configured to operate with an antenna having a first range of resonant frequencies, a tag antenna coupled to the RFID circuit (the tag antenna having a range of resonant frequencies different than the first range of resonant frequencies, the range of resonant frequencies of the tag antenna being a second range of resonant frequencies).
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Citations
19 Claims
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1. A radio frequency identification (RFID) tag comprising:
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a RFID circuit configured to operate in a first range of resonant frequencies; a tag antenna coupled to the RFID circuit, the tag antenna having a range of resonant frequencies different than the first range of resonant frequencies, the range of resonant frequencies of the tag antenna being a second range of resonant frequencies; and a rectifier circuit coupled between the RFID circuit and the tag antenna, wherein the rectifier circuit is configured to be operable at the second range of resonant frequencies and enables the RFID circuit to operate in the second range of resonant frequencies. - View Dependent Claims (2, 3, 4, 5)
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6. A system comprising:
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a radio frequency identification (RFID) reading system comprising; a RFID reader; and a reading antenna coupled to the RFID reader, the reading antenna configured to operate within a first band of frequencies; a RFID tag comprising; a RFID circuit configured to operate with RFID reading systems that operate in a second band of frequencies different than the first band of frequencies; a tag antenna coupled to the RFID circuit, the tag antenna configured to operate in the first band of frequencies; and a rectifier circuit coupled between the RFID circuit and the tag antenna, wherein the rectifier circuit is configured to operate at the first band of resonant frequencies and enables the RFID circuit to operate in the first band of resonant frequencies. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A method to design a radio frequency identification (RFID) tag comprising:
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selecting an RFID circuit designed to operate in a first band of frequencies; selecting a tag antenna configured to operate in a second band of frequencies, the second band of frequencies different than the first band of frequencies; and selecting a rectifier circuit to be coupled between the RFID circuit and the tag antenna, the rectifier circuit configured to be operable in the second band of frequencies and enabling the RFID circuit to operate in the second band of frequencies. - View Dependent Claims (15, 16)
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17. A radio frequency identification (RFID) tag comprising:
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a means for participating in a protocol for communications with a RFID reader means; a means for impedance matching, the means for impedance matching coupled to the means for participating; a means for broadcasting electromagnetic waves coupled to the means for impedance matching, the means for broadcasting configured for operation in a first band of frequencies; and a means for rectifying coupled between the mean for impedance matching and the means for broadcasting; wherein the means for participating and the means for impedance matching are designed for use in systems operating in a second band of frequencies different than the first band of frequencies and further wherein the means for rectifying is configured to operate at the first band of resonant frequencies and enables the means for participating to be in the first band of frequencies. - View Dependent Claims (18, 19)
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Specification