Patent ID: 7730772

Claim:
A wireless and batteryless pressure sensor apparatus, comprising: a SAW pressure sensor for sensing an applied pressure of interest, the SAW pressure sensor receiving an interrogating radio frequency (RF) signal from a remote interrogation unit via a first antenna, wherein a resonant frequency of the SAW pressure sensor changes with the applied pressure; the first antenna provided on a printed circuit board and connected to said SAW pressure sensor; an RFID device; a second antenna connected to the RFID device, the second antenna also provided on a printed circuit board; a sensor package base having an input pressure port that is in fluid communication with the SAW sensor for exposing the SAW sensor to the applied pressure of interest; and a sensor package cover coupled to the sensor package base, the sensor package cover and the sensor package base together define a cavity that houses the SAW pressure sensor, the RFID device and the first and second antenna.