Extended range RF-ID transponder

摘要: An transponder arrangement (10) for use with tires (20) is described. The includes an antenna (14) which mounted about the tire's perimeter. preferably has a coupling coil (16) at one end. A (12) located close to and loosely coupled (16). RF-ID efficiency of generally optimized this type application by long but narrow solution simple fact that amplifies emission transponder's signal relative noise, thus improving signal-to-noise ratio system. degree between not particularly critical. acts extend reading range interrogator (24) be generally, radially symmetric tire (20). Other arrangements are disclosed.