Long Range Wireless SAW Passive Tag System Using Patch Antenna for Vibration Monitoring

We have developed 920 MHz band long range wireless SAW passive tag system (WSPTS) using patch antenna for the purpose of structural health monitoring (SHM). Our WSPTS has achieved more than 6 m reading distance. Each reflective FMCW signal from the passive tag can be distinguished in the reader unit by realizing Tx-Rx antenna isolation of more than 50 dB by patch antennas.

[1]  F. Harris.  On the use of windows for harmonic analysis with the discrete Fourier transform , 1978, Proceedings of the IEEE.

[2]  Stephen A. Dyer,et al.  Digital signal processing , 2018, 8th International Multitopic Conference, 2004. Proceedings of INMIC 2004..

[3]  A. Weeks,et al.  915 MHz SAW wireless passive sensor system performance , 2016, 2016 IEEE International Ultrasonics Symposium (IUS).

[4]  Joshua R. Smith,et al.  Battery-free wireless identification and sensing , 2005, IEEE Pervasive Computing.

[5]  J. Kondoh,et al.  Long range wireless SAW passive tag system for vibration monitoring , 2017, 2017 IEEE International Ultrasonics Symposium (IUS).