Patent ID: 8686847

Claim:
A vehicle entry/tire pressure monitoring system for a vehicle, the system comprising: an electronic control unit (â€œECUâ€); low frequency (â€œLFâ€) antennas mounted on the vehicle and being in communication with the ECU, each LF antenna being configured to transmit an LF tire sensor wake up field and a SMART entry LF search field to wake up a portable transmission/reception unit for keyless entry of the vehicle; and tire sensors mounted in, on or adjacent respective tires of the vehicle, each tire sensor being configured to take air pressure measurements for the respective tire including a two-axis receiver antenna and an RF transmitter configured to transmit a radio frequency (â€œRFâ€) signal, wherein the two-axis antenna is configured such that a first axis of the two-axis antenna is configured to detect a respective LF field transmitted by one of the LF antennas and a second axis of the two-axis antenna is configured to detect a respective LF field transmitted by another of the LF antennas, wherein the LF antennas include a first LF antenna mounted nearer a longitudinal centerline of the vehicle as compared to an outboard side of the vehicle and a second LF antenna mounted nearer the outboard side of the vehicle as compared to the longitudinal centerline of the vehicle, and wherein the first axis is arranged generally transverse to the longitudinal centerline of the vehicle, and the second axis is arranged generally parallel with the longitudinal centerline of the vehicle.