Input electrical impedance and efficiency of ultrasonic transducers with phased excitation of two piezoelectric plates

Resumo

The type of changes in the total input conduction and its active and reactive components has been analyzed for an ultrasonic transducer with two independent piezoelectric plates separated by a dielectric layer as compared with the case of in-phase excitation of the transducer. Results of calculating the efficiency are considered for different transducer designs in accordance with a synthesisproblem solution that ensures a uniform amplitude-frequency response and a linear phase-frequency characteristic of emission.