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发明授权
US6020672A Surface acoustic wave converter with improved frequency characteristics, surface acoustic wave device using such converter, and communication system using such device 失效
具有改善频率特性的表面声波转换器，使用这种转换器的表面声波装置，以及使用这种装置的通信系统

Surface acoustic wave converter with improved frequency characteristics, surface acoustic wave device using such converter, and communication system using such device
摘要：
A surface acoustic wave converter for converting an electric signal into a surface acoustic wave includes an interdigital transducer provided on a piezoelectric substrate. The interdigital transducer has first and second electrode groups each having one or more electrode fingers to which a first signal is almost simultaneously inputted. The surface acoustic wave converters includes first input unit for inputting the first signal to the one or more electrode fingers of the first electrode group, and second input unit for inputting the first signal to the one or more electrode fingers of the second electrode group when at least one of surface acoustic waves excited by the first signal in the one or more electrode fingers of the first electrode group reaches one of the one or more electrode fingers of the second electrode group.
摘要（中）：

用于将电信号转换为声表面波的表面声波转换器包括设置在压电基板上的叉指式换能器。 叉指换能器具有第一和第二电极组，每个电极组具有一个或多个电极指，几乎同时输入第一信号。 表面声波转换器包括用于将第一信号输入到第一电极组的一个或多个电极指的第一输入单元和用于在第二电极组中的第一电极组的一个或多个电极指的第一信号输入的第二输入单元 由第一电极组的一个或多个电极指中的第一信号激发的表面声波中的至少一个到达第二电极组的一个或多个电极指中的一个。

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