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    • 4. 发明授权
    • Surface acoustic wave element and communication system using the same
    • 表面声波元件和通信系统使用相同
    • US5367216A
    • 1994-11-22
    • US921746
    • 1992-07-30
    • Koichi EgaraKenji NakamuraNorihiro Mochizuki
    • Koichi EgaraKenji NakamuraNorihiro Mochizuki
    • G06G7/195H03H9/02H01L41/08
    • G06G7/195H03H9/02543H03H9/02866
    • A surface acoustic wave element is provided with a piezoelectic substrate, a first input transducer, a second input transducer and an output device such as output electrode. The piezoelectric substrate has a first and a second surfaces which are mutually faced. The first input transducer is formed on the first surface of the substrate to generate a first surface acoustic wave which propagates in a predetermined direction. The second transducer is formed on the first surface of the substrate to generate a second surface acoustic wave which propagates in a direction opposite to the predetermined direction. The output device is formed on the first surface of the substrate to extract a signal produced by an interaction of the first and second surface acoustic waves. At least part of the second surface of the substrate is caused to be inclined in a direction perpendicular to the predetermined direction with respect to the first surface.
    • 表面声波元件设置有压电基板,第一输入换能器,第二输入换能器和输出装置,例如输出电极。 压电基板具有相互面对的第一和第二表面。 第一输入传感器形成在基板的第一表面上,以产生沿预定方向传播的第一声表面波。 第二传感器形成在基板的第一表面上,以产生沿与预定方向相反的方向传播的第二声表面波。 输出装置形成在基板的第一表面上,以提取由第一和第二声表面波的相互作用产生的信号。 使基板的第二表面的至少一部分相对于第一表面在垂直于预定方向的方向上倾斜。