電容加權叉指換能器進化設計

為簡化電容加權叉指換能器的設計過程，提出了一種新的設計方法。他將電容加權叉指換能器各指對的兩加權電容差值為進化對象，目標頻率響應特性和待進化的電容加權叉指換能囂的頻率響應特性在考慮頻率范圍內1 601個頻率點處最大差值的最小值為進化目標，通過排序選擇、交叉和變異等遺傳操作自動進化出符合任意路定性能要求的電容加權叉指換能器。進化實驗結果表明，進化設計得到的電容加權叉指換能囂頻率響應幾乎與任意給定的頻率響應特性重疊，進化設計方法正確、高效、實用性強。

A new method tO design capacitive weighted interdigital transducer is adopted for simplicity，of which differential value of two weighted capacitive coupled a pair of fingers is regarded as evolutionary object and the minimum value of maxima1 differentia1 value
between objective frequency response and frequency response of capacitive weighted interdigital transducer on 1601 frequency value in corresponding frequency rang a5 evolutionary target．The capacitive weighted interdigital transducer is obtained after ranking selection，crossover and mutation operation．Evolutionary experiment shows that objective frequency response is near coincidence tO frequency re—sponse of capacitive weighted interdigital transducer obtained by evolutionary design．The evolutionary design is correct，efficient andpractica1．