Analysis of characteristics of broadband matching for piezoelectric ceramic transducer

Characteristics of broadband matching for piezoelectric ceramic transducer are fully analyzed.It is stated that in the case of without an all pass function,good matching characteristics of maximum bandwidth and gain-bandwidth product are indicated in the Butterworth matching theorem.If the parameterσ<252,it is not helpful to add an all pass function to the circuit following the rule of lowest center frequency and maximum gain-bandwidth product.