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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >New architectures for feedthrough SAW recursive devices
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New architectures for feedthrough SAW recursive devices

机译：直通SAW递归设备的新架构

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摘要

This work presents an analysis of a new type of feedthrough recursive surface acoustic wave (SAW) device. The device combines a conventional SAW structure with positive feedback in a way that allows use of selective properties of the SAW structure, control of the central frequency and bandwidth, achieving significantly higher quality factors for given dimensions of the structure, and reduction of the sidelobe level. Several possible implementations are discussed from a simple one that uses external circuitry to the most advanced that includes digital supervisory control. Equations are presented that relate the central frequency, bandwidth, and sidelobe level to the parameters of the SAW structure and feedback loop. The simulation results were found to be in good agreement with experimental data. These data show the control of the central frequency within 1%, a 10-fold increase in the quality factor compared to the original SAW structure, and a reduction of the sidelobe level by 20 dB irrespective of the influence of second order effects and random manufacturing fluctuations.
机译：这项工作提出了一种新型的馈通递归表面声波（SAW）设备的分析。该器件将传统的SAW结构与正反馈相结合，从而可以利用SAW结构的选择性特性，控制中心频率和带宽，在给定结构尺寸下实现明显更高的品质因数并降低旁瓣电平。讨论了几种可能的实现方式，从使用外部电路的简单实现到包括数字监控的最高级实现。提出了将中心频率，带宽和旁瓣电平与SAW结构和反馈环路的参数相关联的方程。仿真结果与实验数据吻合良好。这些数据表明，将中心频率控制在1％以内，与原始SAW结构相比，品质因数提高了10倍，旁瓣电平降低了20 dB，而不受二阶效应和随机制造的影响波动。

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