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提出并证明了压电陶瓷发射换能器的Butterworth匹配定理。定理的显公式形式使复杂的宽带匹配问题变成为简单的算术问题．举例说明经过匹配之后,换能器带宽明显提高,而功率增益却接近于1。
The Butterworth matching theorem of piezoelectric ceramic transducer was proposed and proved. The explicit formula form of the theorem turns the complicated broadband matching problem into a simple arithmetic problem. The example shows that after matching, the transducer bandwidth is significantly increased, while the power gain is close to unity.