Low-loss saw gas sensor with self-temperature-compensation characteristics for sensor network

Novel SAW sensor for gasses and odors has been invented. The structure has self-temperature-compensation characteristics. Sensor network which can monitor hydrogen-gas leakage from future fuel-cell cars and environments for healthcare of old people and in hospitals has been proposed using this technology. However, sensor nodes operate under extreme low-power consumption, which requires dramatic loss reduction for SAW delay-line sensors. We have invented a new low-loss SAW delay line structure keeping the self-temperature-compensation characteristics. We will present experimental results for the former and simulation results for the latter in this paper.