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OPTIMIZATION OF INNER STRUCTURE OF FAN-SHAPED SAW TRANSDUCERS

机译:风扇形锯换能器内部结构的优化

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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.
机译:提出了一种优化过程,用于通过分配各个电极的极性来改善扇形渐进式换能器(FATT)的选择性。在第一阶段,选择用于输入和输出FADT的加权功能,根据该初始电极结构形成。在主阶段,执行电极极性布置的更精确调谐以以最佳方式满足滤波器频率响应规格。使用所描述的算法设计了带宽为2-50%的带宽和带外抑制47 60 dB的过滤器。

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