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
    • 4. 发明授权
    • Resonator ladder surface acoustic wave filter suppressing spurious
signals
    • 谐振器梯形声波滤波器抑制杂散信号
    • US5729186A
    • 1998-03-17
    • US629978
    • 1996-04-09
    • Shun-ichi SekiKazuo EdaYutaka TaguchiKeiji OnishiHiroki SatoOsamu Kawasaki
    • Shun-ichi SekiKazuo EdaYutaka TaguchiKeiji OnishiHiroki SatoOsamu Kawasaki
    • H03H9/145H03H9/64
    • H03H9/6483H03H9/1452
    • A resonator ladder surface acoustic wave (SAW) filter, which has a wide and flat pass band without spurious signals therein is provided. An input electrode, a serial arm SAW resonator, an output electrode, a parallel arm SAW resonator and a ground electrode are respectively formed on a 41.degree.-rotated Y-cut X-propagation lithium niobate substrate. The serial arm SAW resonator comprises a pair of interdigital transducers (IDTs) to excite SAW, one of which is connected to the input electrode. The output electrode is connected to the other IDT of the serial arm SAW resonator. The parallel arm SAW resonator comprises a pair of IDTs to excite SAW, one of which is connected to the output electrode. And the ground electrode is connected to the other IDT of the parallel arm SAW resonator. The IDTs are metal films of Al or Al-based alloy, and the thickness of the metal films ranges from 2.5% to 7.5% of the electrode cycle of the IDT of the parallel arm SAW resonator.
    • 提供了一种谐振器梯形声表面波(SAW)滤波器,其具有宽而平坦的通带,无杂散信号。 分别在41°旋转的Y切X传播铌酸锂基板上形成输入电极,串联臂SAW谐振器,输出电极,并联臂SAW谐振器和接地电极。 串联臂SAW谐振器包括一对用于激励SAW的叉指式换能器(IDT),其中一个连接到输入电极。 输出电极连接到串联臂SAW谐振器的另一IDT。 并联臂SAW谐振器包括一对激励SAW的IDT,其中一个连接到输出电极。 并且接地电极连接到并联臂SAW谐振器的另一个IDT。 IDT是Al或Al基合金的金属膜,金属膜的厚度在平行臂SAW谐振器的IDT的电极周期的2.5〜7.5的范围内。