SAW Sensor with HFM Reflectors

A SAW temperature sensor exploiting Ultra-Wide-Band (UWB) Hyperbolically Frequency Modulated (HFM) signals is designed and manufactured. The device operates in the 2000MHz to 2500MHz frequency range (and B of 500MHz). The dispersive grooved reflectors have HFM pulses as an impulse response with durations of 1000ns (BxT of 500). Packaged devices are measured and show close to expected behavior and the compressed pulses have durations of around 2ns. First results of remote measurements with a reader are reported.