会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 19. 发明授权
    • Surface acoustic wave resonator with an interdigital transducer divided into regions having a different fixed pitch
    • 具有叉指换能器的表面声波谐振器被分成具有不同固定间距的区域
    • US06946932B2
    • 2005-09-20
    • US10679480
    • 2003-10-07
    • Michiaki TakagiYoshio MaedaTakashi YamazakiKeigo Iizawa
    • Michiaki TakagiYoshio MaedaTakashi YamazakiKeigo Iizawa
    • H01L41/09H01L41/18H03H9/02H03H9/145H03H9/25H03H9/64
    • H03H9/25H03H9/02551H03H9/14582
    • In a substrate in which a reflection coefficient γ of a surface acoustic wave per electrode is small, the invention obtains a Q value or a CI value level, which is equivalent to or higher than that of a related art product, at a device size which is equivalent to the related art product which addresses the problem that the size of a surface acoustic wave resonator becomes larger. A surface acoustic wave resonator includes one interdigital transducer to excite a surface acoustic wave in a propagation direction x on a piezoelectric plate and a pair of reflectors arranged on both sides thereof in the propagation direction. The interdigital transducer is divided into three regions. The electrode fingers of the interdigital transducer of each region are formed at a fixed pitch which differs within 2%. The surface acoustic wave resonator possesses a single peak response. The form in which a vibration displacement envelope amplitude in the interdigital transducer region is normalized is a form which takes a maximum value 1 at the center position, which smoothly takes a value in a range of 0.33 to 0.53 at a position ¼ from both ends, and which smoothly takes a value in a range of 0.048 to 0.177 at positions at both ends.
    • 在每个电极的表面声波的反射系数γ小的基板中,本发明以如下装置尺寸获得与现有技术产品相同或更高的Q值或CI值电平 相当于解决声表面波谐振器的尺寸变大的问题的现有技术的产品。 表面声波谐振器包括一个叉指式换能器,以在压电板上的传播方向x上激发表面声波,并且在传播方向的两侧布置一对反射器。 叉指换能器分为三个区域。 每个区域的叉指换能器的电极指以固定的间距形成,其在2%内不同。 表面声波谐振器具有单峰响应。 叉指换能器区域中的振动位移包络振幅被归一化的形式是在中心位置处取最大值1的形式,在两端的位置¼平滑地取0.33〜0.53的范围内的值, 并且在两端的位置平滑地获得0.048〜0.177的范围的值。