抄録
A synthesis and design of the acoustic matching layers for piezoelectric ultrasonic transducers are presented. It is shown that the acoustic characteristic impedances for matching layers arc determined from the given operating attenuation when each thickness of the matching layers is taken for the quater-wavelength. As an example, a procedure of design for two layer-type transducers is demonstrated, where theoretical bandwidth of a ceramic transducer is about 70% and maximum insertion loss is expected 1.8dB for water load. The performance of this transducer is found to be in good agreement with the theoretical prediction.
