Extended range RF-ID transponder
First Claim
1. An RF-ID arrangement for use in a tire or other object to be identified by an interrogator operable to send a wireless RF interrogation signal, said arrangement comprising:
- a single-ended antenna located approximately circumferencially on said object for receiving said wireless RF interrogation signal from said interrogator and for transmitting a wireless response signal;
an antenna coupling coil attached to one end of said single-ended antenna and in electrical communication therewith; and
a transponder located on said object, said transponder having a transponder coupling coil and located in close proximity to said antenna coupling coil and magnetically coupled thereto, said transponder being operable to receive said RF interrogation signal and operable to generate said wireless response signal.
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0 Petitions
Accused Products
Abstract
An transponder arrangement (10) for use with tires (20) is described. The arrangement (10) includes an antenna (14) which is mounted about the tire'"'"'s (20) perimeter. The antenna (14) preferably has a coupling coil (16) at one end. A transponder (12) is preferably located close to the coupling coil (16) and is preferably loosely coupled to the coupling coil (16). The RF-ID efficiency of the arrangement (10) is generally optimized for this type of application by the long but narrow antenna solution and by the simple fact that coupling an antenna (14) to a transponder (12) amplifies the emission of the transponder'"'"'s signal relative to the noise, thus improving the signal-to-noise ratio of the RF-ID system. The degree of coupling between the antenna (14) and the transponder (12) is not particularly critical. The antenna (14) acts to extend the reading range for the interrogator (24) to be generally, radially symmetric about the tire (20). Other arrangements are disclosed.
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Citations
19 Claims
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1. An RF-ID arrangement for use in a tire or other object to be identified by an interrogator operable to send a wireless RF interrogation signal, said arrangement comprising:
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a single-ended antenna located approximately circumferencially on said object for receiving said wireless RF interrogation signal from said interrogator and for transmitting a wireless response signal; an antenna coupling coil attached to one end of said single-ended antenna and in electrical communication therewith; and a transponder located on said object, said transponder having a transponder coupling coil and located in close proximity to said antenna coupling coil and magnetically coupled thereto, said transponder being operable to receive said RF interrogation signal and operable to generate said wireless response signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An RF-ID arrangement for use in a tire to be identified by an interrogator unit operable to send a wireless RF interrogation signal, said arrangement comprising:
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a tire; a transponder located on said tire, said transponder having a transponder coupling coil, said transponder being operable to receive said interrogation signal and to generate a transponder response signal; an single-ended antenna located approximately circumferencially on said tire for receiving said interrogation signal and for transmitting said transponder response signal; and an antenna coupling coil electrically connected to said end of said antenna and located in close proximity to said transponder coupling coil and magnetically coupled thereto, said coupling coils for magnetically coupling said interrogation signal from said antenna to said transponder and for magnetically coupling said transponder response signal from said transponder to said antenna. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification