Surface acoustic wave filter
    1.
    发明授权
    Surface acoustic wave filter 失效
    表面声波滤波器

    公开(公告)号:US4451805A

    公开(公告)日:1984-05-29

    申请号:US371502

    申请日:1982-04-23

    摘要: A surface acoustic wave filter which comprises a substrate of piezoelectric material and a multistrip coupler. The multistrip coupler comprises a plurality of parallel conductive strips formed on the substrate; at least one input transducer is disposed on one side of the multistrip coupler, and at least one output transducer is disposed on the other side of the multistrip coupler. The surface acoustic wave filter is characterized in that a part of the middle portion of each of the conductive strips of the multistrip coupler is made of a photoconductive material.

    摘要翻译: 一种表面声波滤波器,包括压电材料的基片和多波束耦合器。 所述多段耦合器包括形成在所述衬底上的多个平行导电条; 至少一个输入换能器设置在多段耦合器的一侧上,并且至少一个输出换能器设置在多段耦合器的另一侧上。 表面声波滤波器的特征在于,多皮耦合器的每个导电条的中间部分的一部分由光电导材料制成。