过去,人们总是说,延迟线在甚高频和超高频范围内工作是不理想的。而美帝Litton工业公司最近报导制出了几种抽头延迟线,其最高工作频率可达700兆赫。这种延迟线是用压电晶体铌酸鲤作基片,采用许多电极组成的栅状换能器(与叉指换能器结构相 In the past, people always said that it was not ideal to have delay lines work in the VHF and UHF ranges. The Littelfuse Littoral Company recently reported that several tapped delay lines were produced that can operate at up to 700 MHz. This delay line is the use of piezoelectric crystal niobium carp as a substrate, the use of many electrodes composed of grid-like transducer (interdigital transducer structure phase