ELECTROMECHANICAL TRANSDUCER COMPRISING A PAIR OF ANTIPARALLEL POLED RECTANGULAR PIEZOELECTRIC CERAMIC PIECES

摘要

A torsional mode electromechanical transducer comprises a pair of rectangular ceramic pieces poled longitudinally and made integral, with a longer side surface of one of the ceramic pieces attached to a similar surface of the other and with the residual polarization directed antiparallel. A mechanical resonator having a planar surface may be used as one or each of the electrodes for exciting the transducer, with the ceramic pieces attached to the planar surface.