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    • 5. 发明公开
    • 탄성 표면파 장치 및 통신 장치
    • 表面声波设备和通信设备
    • KR1020020070868A
    • 2002-09-11
    • KR1020020010875
    • 2002-02-28
    • 가부시키가이샤 무라타 세이사쿠쇼
    • 다카미네유이치
    • H03H9/64
    • H03H9/0042H03H9/0061H03H9/02874H03H9/02913H03H9/02921H03H9/02992H03H9/14582H03H9/14591H03H9/6489
    • PURPOSE: Surface acoustic wave device and communication device are provided, which has a filter characteristic, especially, a balance-unbalance conversion function, and a communications device including such a novel surface acoustic wave device. CONSTITUTION: The surface acoustic wave device according to the first preferred embodiment of the present device includes a longitudinally-coupled resonator type surface acoustic wave unit(1), and IDTs 2 and 3 as a surface acoustic wave resonator connected in series with the surface acoustic wave unit(1) which are provided on a piezoelectric substrate(20) made of, for example, 40 +/- 5 DEG Y cut X propagation LiTaO3. The piezoelectric substrate(20) is made of other suitable materials. The longitudinally-coupled resonator type surface acoustic wave unit 1 and the IDTs 2 and 3 are preferably made of aluminum(Al) electrodes(foils) which are formed by photolithography or other suitable process.
    • 目的:提供具有滤波器特性,特别是平衡不平衡转换功能的表面声波装置和通信装置,以及包括这种新型表面声波装置的通信装置。 构成:本装置的第一实施方式的声表面波装置包括纵向耦合的谐振器型声表面波单元(1),作为表面声波谐振器的IDT2和3与表面声波 波形单元(1),其设置在由例如40 +/- 5°Y切割的X传播LiTaO 3制成的压电基板(20)上。 压电基片(20)由其他合适的材料制成。 纵向耦合的谐振器型声表面波单元1和IDT2和3优选地由通过光刻或其它合适的工艺形成的铝(Al)电极(箔)制成。
    • 9. 发明公开
    • 탄성 표면파 디바이스
    • 表面声波设备
    • KR1020060040726A
    • 2006-05-10
    • KR1020067001959
    • 2004-07-28
    • 파나소닉 주식회사
    • 후세,노부오
    • H03H9/145H03H9/25H03H9/72
    • H03H9/0576H03H9/02913H03H9/6483H03H9/725
    • A surface acoustic wave device comprising a surface acoustic wave element (11), in which two types of surface acoustic wave filter arrangement having different central frequencies are provided on the same piezoelectric substrate (12), and which is disposed on a package (16). The surface acoustic wave element (11) comprises a first filter arrangement (13) having a first central frequency, a second filter arrangement (14) having a second central frequency, and a shield electrode (15) interposed between the first filter arrangement (13) and the second filter arrangement (14). A smaller surface acoustic wave device can be realized by connecting the shield electrode (15) to the earth terminal (182) of the package (16) to complete earthing and preventing electromagnetic interference, thereby improving isolation characteristics.
    • 一种表面声波装置,包括声表面波元件,其中具有不同中心频率的两种表面声波滤波器装置设置在相同的压电基片上,并且设置在封装体上, 。 表面声波元件(11)包括具有第一中心频率的第一滤波器装置(13),具有第二中心频率的第二滤波器装置(14)和介于第一滤波器装置(13)之间的屏蔽电极 )和第二过滤器装置(14)。 通过将屏蔽电极(15)连接到封装(16)的接地端子(182)可以实现更小的表面声波装置,以完成接地并防止电磁干扰,从而提高隔离特性。