Design of Transponder for Wireless Resonant Temperature SAW Sensor

The signal processing of passive Surface-Acoustic- Wave(SAW) sensors is similar to that of radar signals, the hardware design by discrete components is complicated. With the massive applications of RF transceiver front-end chip in the smart home, automotive electronics and IoT, more and more functions are being integrated in one chip, and the cost is gradually lower. In this paper, the most common RF transceiver chip is used to realize the signal transceiver for SAW sensor. In order to increase isolation of transceiver channel, two same RF chip are used in transmitting and receiving channel respectively. Compared with the system based on discrete components, it is easy to be implemented and has the features of lower cost, smaller size.