REMOTELY TESTABLE TEMPERATURE SENSOR

摘要

The invention relates to a remotely testable surface acoustic wave temperature sensor comprising on the surface of an Y'-cut quartz substrate forming an angle theta with the axis Y, at least two resonators (T1SAW, T2SAW) provided with transducers consisting of interdigital electrodes which are connected to control buses and embodied in such a way that they have different frequency operating characteristics. The first resonator has a first surface acoustic wave propagation direction which is parallel with respect to the substrate axes and the second resonator has a surface acoustic wave propagation direction which form a non-null angle ( beta ) with the propagation direction of the first resonator. Said invention is characterised in that the control busses of the second transducer are inclined at a non-null angle ( UPSILON ) with respect to a normal to the interdigital electrodes of the second transducer in such a way that it is possible to compensate a divergence of the acoustic wave energy fluxes with respect to the surface acoustic wave propagation direction along said second transducer.