Sticker transponder for use on glass surface
DCFirst Claim
1. A sticker transponder adapted to be affixed to a glass surface, comprising:
- a flexible circuit substrate having an antenna formed thereon and a transponder circuit disposed on the substrate and coupled to said antenna;
wherein, said antenna has a characteristic impedance defined in part by a dielectric constant of said flexible circuit substrate in combination with a dielectric constant of said glass surface, such that a proper impedance match between said antenna and said transponder circuit is achieved only when said sticker transponder is affixed to said glass surface.
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Accused Products
Abstract
A sticker transponder adapted to be affixed to a glass surface, such as a vehicle windshield, includes a RFID transponder enabling the storage and retrieval of vehicle related data. The sticker transponder comprises a flexible circuit substrate having an antenna formed thereon and a transponder circuit disposed on the substrate and coupled to the antenna. An adhesive layer is coupled to a first surface of the flexible circuit substrate. An indicia layer is coupled to a second surface of the flexible circuit opposite from the first surface. The indicia layer comprises a space permitting indicia to be printed thereon. The antenna has a characteristic impedance defined in part by a dielectric constant of the flexible circuit substrate in combination with a dielectric constant of the glass surface. As a result, a proper impedance match between the antenna and the transponder circuit is achieved only when the sticker is affixed to the glass surface. The sticker transponder further comprises a release liner affixed to the adhesive layer, the release liner being selectively removable to permit the sticker transponder to be affixed to the glass surface. The transponder circuit further includes a memory having a read-only portion and a re-writable portion.
292 Citations
16 Claims
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1. A sticker transponder adapted to be affixed to a glass surface, comprising:
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a flexible circuit substrate having an antenna formed thereon and a transponder circuit disposed on the substrate and coupled to said antenna; wherein, said antenna has a characteristic impedance defined in part by a dielectric constant of said flexible circuit substrate in combination with a dielectric constant of said glass surface, such that a proper impedance match between said antenna and said transponder circuit is achieved only when said sticker transponder is affixed to said glass surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for storing vehicle data, comprising the steps of:
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affixing a sticker transponder to a glass surface of a vehicle, the sticker transponder comprising a flexible circuit substrate having a dipole antenna formed thereon and a transponder circuit disposed on the substrate and coupled to said antenna, said transponder circuit including a memory, said antenna having a characteristic impedance defined in part by a dielectric constant of said flexible circuit in combination with a dielectric constant of said glass surface, such that a proper impedance match between said antenna and said transponder circuit is achieved only when said sticker transponder is affixed to said glass surface; and storing vehicle data in said memory that is accessible to a reader disposed remotely from said vehicle. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A sticker transponder, comprising:
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a flexible circuit substrate having an antenna formed thereon and a transponder circuit disposed on the substrate and coupled to said antenna; a spacer layer affixed to said flexible circuit substrate; and an adhesive layer coupled to an opposite side of said spacer layer from said flexible circuit substrate; wherein, said antenna has a characteristic impedance defined in part by a dielectric constant of said flexible circuit substrate in combination with a dielectric constant of said spacer layer.
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Specification