在压电基片(介绍了Y切Z传播的铌酸鲤基片)上的声表面波传播,由于使用叉指换能器能够沿传播通道任一点上有效地抽出信号,故把它用于抽头延迟线是很理想的。为了使延迟线脉冲响应特性是在选定抽头上用极性反转的方法来得到的相移键控射频信 The SAW propagation on a piezoelectric substrate, which introduces a Y-cut Z-propagated niobate carp substrate, is useful for extracting signals at any point along the propagation path using interdigital transducers Tap delay line is ideal. In order for the delay line impulse response characteristic to be obtained by phase reversal on the selected tap using phase shift keying radiofrequency