压电陶瓷换能器宽带匹配特性分析  

Analysis of characteristics of broadband matching for piezoelectric ceramic transducer

作　　者：高天赋[1] 曾娟[1] 彭大勇[1] 

机构地区：[1]中国科学院声学研究所,北京100080

出　　处：《声学学报》2007年第2期97-102,共6页Acta Acustica

基　　金：国家自然科学基金(10074069;10574137)

摘　　要：对压电陶瓷换能器的宽带匹配特性作了全面的分析表明：在不添加全通函数情况,Butterworth匹配定理涵有最低中心频率最大带宽和最大增益带宽乘积的优良匹配特性；当参数σ＜0．252时,在最低中心频率和最大增益带宽准则下,在电路中添加全通函数是无益的。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 parameter σ〈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.

关 键 词：压电陶瓷换能器 宽带匹配 特性 增益带宽 中心频率 匹配定理 带宽和 函数 

分 类 号：O482.41[理学—固体物理]