Temperature sensing device for aircraft wheel brake

A temperature sensing device to sense aircraft wheel brake temperature during operation of the aircraft wheel brake, the temperature sensing device comprising:

• a sensing device substrate;
• and
• a first package layer and a second package layer attached to the sensing device substrate,
• wherein:
• the sensing device substrate carries one or more of a surface acoustic wave, SAW, sensor element and a sensor antenna, electrically coupled to the SAW sensor element, for sensing temperature,
• wherein the first package layer is disposed on a first surface of the sensing device substrate enclosing the sensor antenna and the SAW sensor element,
• wherein the second package layer is disposed on the first package layer such that the first package layer is between the sensing device substrate and the second package layer,
• wherein the temperature sensing device is configured to withstand temperatures in excess of 1000° C., and
• wherein the second package layer provides additional rigidity and physical robustness for the temperature sensing device to reliably function in a harsh environment.