Surface acoustic wave sensor and package

A wireless and batteryless sensing apparatus, comprising:

• a printed circuit board;
• a SAW sensor package mounted or formed on said printed circuit board for receiving an interrogating radio frequency (RF) signal from a remote interrogator unit and for transmitting a SAW sensor RF response back to the remote interrogator unit, wherein the RF response includes a measure related to at least one resonant frequency for use in determining pressure and/or temperature;
• an RFID device mounted or formed on said printed circuit board with said SAW sensor package;
• at least one antenna in communication with said SAW sensor package and/or said RFID device such that said at least one antenna communicates electrically with said SAW sensor package and/or said RFID device and permits wireless and batteryless interrogation of said SAW sensor package and/or said RFID device by the remote interrogator unit;
• a package base for mounting said printed circuit board, the SAW Sensor package, and the RFID device;
• and
• a package cover, wherein the package cover and package base together define a cavity for housing said SAW sensor package, printed circuit board and said RFID device.