Patent ID: 6938468

Claim:
A tire parameter sensing system for sensing a parameter of a tire of a vehicle, the tire parameter sensing system comprising: a power transmitting antenna that is actuatable for producing a magnetic field at a location of the tire; a rim upon which the tire is mounted, the rim having a circumferential outer surface that is contacted by the tire when the tire is mounted on the rim, at least first and second magnetically conductive surface portions of the rim forming a drop well located within the outer surface, the first and second magnetically conductive surface portions being angled relative to one another; and a tire-based unit for sensing a parameter of the tire and for providing an indication of the sensed parameter, a coil antenna of the tire-based unit being responsive to the magnetic field for providing energy to the tire-based unit, the coil antenna having a central axis, the tire-based unit being mounted in the drop well of the rim so that the coil antenna is located adjacent to both the first and second magnetically conductive surface portions, the central axis of the coil antenna extending in a direction parallel to the first magnetically conductive surface portion and the first and second magnetically conductive surface portions guiding magnetic flux of the magnetic field to the coil antenna.