Surface wave radio sensor has interdigital transducer and reflector with finger electrodes on piezoelectric substrate with selectivity of response signal set by overlap weighting of reflector

摘要

The surface wave sensor has at least one interdigital transducer (1) and a reflector (2) consisting of finger electrodes arranged on a piezoelectric substrate (4), whereby the acoustic surface wave is modulated in an individually specified manner by the reflector and a corresponding response signal is formed. The selectivity of the response signal is set by overlap weighting of the reflector