Focused field antenna for passive RFID tire pressure sensor transponder
First Claim
1. A passive RFID transponder sensor system providing a transponder antenna serving a dual function of housing, a transponder sensor and increasing magnetic flux collecting area of the RFID transponder sensor system, comprising:
- an electronic sensor device; and
a transponder antenna, including an electrical transponder coil electrically connected to said electronic sensor device, said transponder antenna including an enclosure formed of a magnetically permeable metal within which said electrical transponder coil is disposed, said enclosure including a transponder antenna stem having a top portion with an exterior side configured to receive a magnetic flux entering said transponder antenna stem, and said enclosure including a portion configured to concentrate and direct said magnetic flux through said electrical transponder coil, whereby said enclosure of said transponder antenna houses said electronic sensor device and increases magnetic flux collecting area of the RFID transponder sensor system.
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Accused Products
Abstract
A passive RFID transponder sensor system includes a sensor assembly having a focused field transponder antenna with a highly magnetically permeable transponder antenna stem, and a reader antenna with an electrical reader coil generating a magnetic field having magnetic flux extending between the reader antenna and a sensor assembly. The electrical transponder coil and the electrical reader coil are coupled by the magnetic field, so that information can be transferred to and from the sensor assembly through the magnetic field by which the electrical transponder coil and the electrical reader coil are coupled.
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Citations
20 Claims
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1. A passive RFID transponder sensor system providing a transponder antenna serving a dual function of housing, a transponder sensor and increasing magnetic flux collecting area of the RFID transponder sensor system, comprising:
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an electronic sensor device; and a transponder antenna, including an electrical transponder coil electrically connected to said electronic sensor device, said transponder antenna including an enclosure formed of a magnetically permeable metal within which said electrical transponder coil is disposed, said enclosure including a transponder antenna stem having a top portion with an exterior side configured to receive a magnetic flux entering said transponder antenna stem, and said enclosure including a portion configured to concentrate and direct said magnetic flux through said electrical transponder coil, whereby said enclosure of said transponder antenna houses said electronic sensor device and increases magnetic flux collecting area of the RFID transponder sensor system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A passive RFID transponder tire monitoring system providing a transponder antenna serving a dual function of housing, a transponder sensor and increasing magnetic flux collecting area of the RFID transponder sensor system, comprising:
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a sensor assembly, including an electronic sensor device and a sensor transponder antenna, said sensor transponder antenna transponder antenna including an electrical transponder coil electrically connected to said electronic sensor device, said transponder antenna including an enclosure formed of a magnetically permeable metal within which said electrical transponder coil is disposed, said enclosure including a transponder antenna stem having a top portion with an exterior side configured to receive a magnetic flux entering said transponder antenna stem, and said enclosure including a portion configured to concentrate and direct said magnetic flux through said electrical transponder coil; and a reader antenna having an exterior edge, said reader antenna including an electrical reader coil for generating a magnetic field providing said magnetic flux, said magnetic flux extending from the exterior edge of the reader antenna to the sensor assembly, said electrical transponder coil and said electrical reader coil being coupled by said magnetic field, whereby information can be transferred to and from the sensor assembly through said magnetic field by which said electrical transponder coil and said electrical reader coil are coupled, whereby said enclosure of said transponder antenna houses said electronic sensor device and increases magnetic flux collecting area of the RFID transponder sensor system. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification