Tag assembly with multiple antennas, ICs, and/or sensing elements
First Claim
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1. A radio frequency identification (RFID) tag adapted to wirelessly communicate with a remote transceiver, comprising:
- a substrate; and
first and second circuits disposed on the substrate and comprising respective first and second antennas magnetically coupled to one another, the RFID tag having a pre-determined resonant frequency, each one of the first and second circuits in the absence of the other one of the first and second circuits designed to have a resonant frequency different from the pre-determined resonant frequency resulting in the RFID tag having the pre-determined resonant frequency;
a heating element for heating a target area and electrically coupled to the first circuit, the target area having a thermal characteristic; and
first and second sensing elements electrically coupled to the respective first and second circuits and disposed at respective locations different from each other, such that when the heating element is thermally coupled to the target area, the RFID tag wirelessly receives an input power having an input form from a transceiver, the first circuit transforms the input power to a first power and deliver the first power to the heating element, the first and second sensing elements sense a time variation of temperatures at respective locations, and the RFID tag wirelessly transmits to the transceiver a thermal characteristic of the target area based on comparing the time variation of the temperatures at respective locations.
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Abstract
At least some aspects of the present disclosure feature a radio frequency identification (RFID) tag adapted to wirelessly communicate with a remote transceiver. The RFID tag includes a substrate; and first and second circuits disposed on the substrate and comprising respective first and second antennas magnetically coupled to one another. At least some aspects of the present disclosure feature a RFID tag having a plurality of RF circuits, where each RF circuit is electronically coupled to a sensing element.
38 Citations
20 Claims
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1. A radio frequency identification (RFID) tag adapted to wirelessly communicate with a remote transceiver, comprising:
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a substrate; and first and second circuits disposed on the substrate and comprising respective first and second antennas magnetically coupled to one another, the RFID tag having a pre-determined resonant frequency, each one of the first and second circuits in the absence of the other one of the first and second circuits designed to have a resonant frequency different from the pre-determined resonant frequency resulting in the RFID tag having the pre-determined resonant frequency; a heating element for heating a target area and electrically coupled to the first circuit, the target area having a thermal characteristic; and first and second sensing elements electrically coupled to the respective first and second circuits and disposed at respective locations different from each other, such that when the heating element is thermally coupled to the target area, the RFID tag wirelessly receives an input power having an input form from a transceiver, the first circuit transforms the input power to a first power and deliver the first power to the heating element, the first and second sensing elements sense a time variation of temperatures at respective locations, and the RFID tag wirelessly transmits to the transceiver a thermal characteristic of the target area based on comparing the time variation of the temperatures at respective locations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A radio frequency identification (RFID) tag adapted to wirelessly communicate with a remote transceiver, comprising:
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a substrate; and first and second circuits disposed on the substrate and comprising respective first and second antennas magnetically coupled to one another, the RFID tag intended to have a pre-determined resonant frequency, each one of the first and second circuits in the absence of the other one of the first and second circuits designed to have a resonant frequency different from the pre-determined resonant frequency resulting in the RFID tag having the pre-determined resonant frequency; first and second heating elements for heating respective first and second target areas and electrically coupled to the respective first and second circuits, each of the first and second target areas having a thermal characteristic, the thermal characteristic of the first target area being predefined, the thermal characteristic of the second target area being undefined, the first target area disposed on the substrate and thermally coupled to the first heating element, the first heating element and target area thermally isolated from the second heating element and adapted to be thermally isolated from the second target area; and first and second sensing elements thermally coupled to the respective first and second heating elements for sensing a temperature of the corresponding heating element, such that when the second heating element is thermally coupled to the second target area, the RFID tag wirelessly receives an input power having an input form from a transceiver, the first and second circuits transform the input power to respective first and second powers having respective first and second forms and deliver the first and second powers to the corresponding heating element, the first and second sensing elements sense a time variation of the corresponding heating element temperature, and the RFID tag wirelessly transmits to the transceiver a thermal characteristic of the second target area based on comparing the time variation of the first and second heating elements temperatures. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification