声表面波沟槽栅脉冲压缩滤波器(RAC器件)是一种优良的色散延迟线.它利用声表面波在沟槽栅阵上的反射,形成色散时延,具有时延长、带宽大、寄生信号小、可以内加权、脉冲压缩性能好等特点.制作在锗酸铋材料上的RAC器件除这些特点外,由于声表面波速度比一般材料约低一倍,因而更适于制作小体积、大时延 The SAW trench gated pulse compression filter (RAC device) is an excellent dispersion delay line that uses the reflection of surface acoustic waves on the trench gating array to create dispersion delays with long delays and large bandwidths. The parasitic Signal is small, can be weighted, pulse compression performance is good, etc. In addition to these characteristics, RAC devices fabricated on bismuth germanate materials, because the SAW velocity is about twice as low as the average material, so it is more suitable for making small size, Big time delay