扇形SAW换能器内部结构优化

Proceedings of the 2000 IEEE/EIA International Frequency Control Symposium and Exhibition (Cat. No.00CH37052) Pub Date : 2000-06-07 DOI:10.1109/FREQ.2000.887372

E.V. Bausk

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引用次数: 3

摘要

提出了一种优化方法来提高扇形数字间换能器(FIDT)的选择性。在第一阶段，选择输入和输出fidt的权重函数，根据权重函数形成初始电极结构。在主阶段进行更精确的电极极性排列调谐，以最佳方式满足滤波器频率响应规范。利用该算法设计了带宽为2 ~ 50%、带外抑制为47 ~ 60db的声呐滤波器。

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Optimization of inner structure of fan-shaped SAW transducers

An optimization procedure is proposed for improving selectivity of fan-shaped interdigital transducers (FIDT) weighted by assignment of polarities of individual electrodes. At the first stage, weighting functions for input and output FIDTs are chosen, according to which initial electrode structures are formed. At the main stage a more precise tuning of electrode polarity arrangement is performed to meet filter frequency response specifications in the best way. SAW filters with bandwidth of 2-50% and out-of-band rejection of 47-60 dB have been designed with using the described algorithm.

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Proceedings of the 2000 IEEE/EIA International Frequency Control Symposium and Exhibition (Cat. No.00CH37052)

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