Communications: directive radio wave systems and devices (e.g. – Radar transponder system – Unique identity
Patent
1993-04-27
1995-12-26
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Radar transponder system
Unique identity
342 51, 342 50, 1521521, 34082554, G01S 1375, G08B 2900
Patent
active
054791715
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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Donaldson Richard L.
Kesterson James C.
McCormack Brian C.
Sotomayor John B.
Texas Instruments Deutschland GmbH
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