Leibniz-institut Fuer Festkoerper-und Werkstoffforschung Dresden E.v.

Vectron International Gmbh & Co. Kg

Alexander Darinski

Guenter Martin

Bert Wall

Manfred Weihnacht

Sergey Biryukov

A transducer has natural unidirectionality for surface acoustic waves. An interdigital electrode structure is arranged on a piezoelectric crystal substrate and is constructed with interdigital transducers including collecting electrodes and fingers. At least two of the fingers form a transducer cell, which includes at least one excitation center for exciting an electrical potential wave and at least one reflection center for reflecting electrical potential waves. The fingers are oriented perpendicularly to a direction R parallel to a 1- or 3-fold rotational axis of the substrate crystal and the derivative dv/d&#x3b8;=0 applies to R, wherein v is the phase velocity of the surface wave and &#x3b8; is an angular deviation of the perpendicular to the finger direction from the direction R.

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Moscow, Russia

Alexander Darinski