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一、概述声表面波色散延迟线(以下简称SAWDDL,包括金属叉指电极阵列型即IDT型及反射阵列型即RAC,RDA型)是最重要的声表面信号处理器件,也是迄今应用最有成效的一种声表面波器件.使用它可以产生宽带调频信号,其频率时间特性可以是线性的,也可以按要求作成各种非线性的;又可以用它将调频脉冲信号压缩;而且还可以在器件内部实现加权以抑制压缩信号时间旁瓣.利用这些基本特性,它
I. Overview SAWDDL (hereinafter referred to as SAWDDL, including the metal interdigital electrode array that is IDT type and reflective array that is RAC, RDA type) is the most important surface acoustic wave signal processing device, but also the most effective application so far Of a surface acoustic wave device.With it can produce broadband FM signal, the frequency of time characteristics can be linear, can also be made on request of a variety of nonlinear; but also can be used to the FM pulse signal compression; but also in The device internally weights to suppress the side-lobe of the compressed signal. With these basic characteristics, it