TRANSDUCER WITH "NATURAL" UNIDIRECTIONAL EMISSION OF SURFACE ACOUSTIC WAVES Russian patent published in 2014 - IPC H03H9/145 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to electronics and can be used as sensors, resonators, filters, delay lines and in generators. The transducer with "natural" unidirectional emission of surface acoustic waves (SAW) is characterised by that an interdigital structure of electrodes is placed on a piezoelectric crystal substrate which is assembled with interdigital transducers which consist of collectors and teeth, wherein at least two teeth form a transducer cell having at least one system of exciting electrodes for exciting an electric potential wave and at least one system of reflecting electrodes for reflecting electric potential waves; the teeth are mounted vertically in a direction R, which is parallel to the axis of symmetry of the crystal substrate, and the derivative dv/dθ=0 holds for the direction R, where v is the phase velocity of the surface acoustic wave and θ is the angular deviation of the vertical to the direction of a tooth from said direction R.

EFFECT: reduced effect of installation of the electrode structure on the substrate on attenuation, obtaining surface acoustic wave with maximum amplitude.

13 cl, 1 dwg