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8 条记录 (耗时 0.012 秒)

    Saw device
    2.
    发明授权
    Saw device 失效
    锯装置

    公开(公告)号：US06323577B1

    公开(公告)日：2001-11-27

    申请号：US09420938

    申请日：1999-10-19

    申请人： Kenji Inoue ,  Katsuo Sato

    发明人： Kenji Inoue ,  Katsuo Sato

    IPC分类号： H01L4104

    CPC分类号： H03H9/02598

    摘要： A SAW device has interdigital electrodes on a substrate, wherein the substrate is obtained by slicing a single crystal represented by the chemical formula: La3Ta0.5Ga5.5O14 (LTG) at a cut angle. The cut angle and the direction of propagation of SAW along the substrate are optimized so that the substrate may have a low SAW velocity and an increased electromechanical coupling constant. This enables to reduce the size of the SAW device and broaden the pass-band width thereof as a filter, providing satisfactory characteristics especially as a SAW filter of intermediate frequency for mobile communication terminals. The SAW device has a minimal loss since SAW energy concentrates in the propagation direction.

    摘要翻译： SAW器件在衬底上具有叉指电极，其中通过以切割角切割由化学式La3Ta0.5Ga5.5O14（LTG）表示的单晶而获得衬底。 SAW沿着衬底的切割角度和传播方向被优化，使得衬底可以具有低的SAW速度和增加的机电耦合常数。 由此，能够减小SAW器件的尺寸，扩大作为滤波器的通带宽度，特别是作为移动通信终端的中频用SAW滤波器提供令人满意的特性。 SAW器件具有最小的损耗，因为SAW能量集中在传播方向。

    Optimal cut for SAW devices on langatate
    5.
    发明授权
    Optimal cut for SAW devices on langatate 失效
    优良的SAW器件在langatate上的切割

    公开(公告)号：US6097131A

    公开(公告)日：2000-08-01

    申请号：US271396

    申请日：1999-03-17

    申请人： Natalya F. Naumenko ,  Leland P. Solie

    发明人： Natalya F. Naumenko ,  Leland P. Solie

    IPC分类号： H03H9/02 ,  H03H9/25

    CPC分类号： H03H9/02598

    摘要： A lanthanum gallium tantalate single crystal substrate, referred to as langatate, has a prescribed range of Euler angles for substrate and crystal orientation for improving signal processing for a surface acoustic wave (SAW) device. When a voltage is applied to an input interdigital transducer (IDT) of the SAW device, a surface acoustic wave is generated in the langatate piezoelectric substrate. The surface acoustic wave propagates in a direction generally perpendicular to electrodes of the IDT. The langatate crystal cut and wave propagation directions are defined which reduce insertion loss and frequency response distortion due to SAW transduction, diffraction, and beam steering, while achieving improved temperature stability SAW device as compared to other commonly used crystal substrates. A low power flow angle and reduced level of diffraction is also achieved.

    摘要翻译： 钽酸镓镧单晶衬底（称为langatate）具有用于改善表面声波（SAW）器件的信号处理的衬底和晶体取向的欧拉角的规定范围。 当电压施加到SAW器件的输入叉指式换能器（IDT）时，在水平压电衬底中产生表面声波。 表面声波沿大致垂直于IDT的电极的方向传播。 定义了长时间的晶体切割和波传播方向，其与其他通常使用的晶体基板相比，可以实现SAW传导，衍射和光束转向的降低的插入损耗和频率响应畸变，同时实现改进的温度稳定性SAW器件。 还实现了低功率流动角度和降低的衍射水平。

    Substrate lamina made of langasite or langatate
    8.
    发明申请
    Substrate lamina made of langasite or langatate 审中-公开
    基质层由菱镁矿或菱镁矿制成

    公开(公告)号：US20020017828A1

    公开(公告)日：2002-02-14

    申请号：US09923733

    申请日：2001-08-07

    申请人： SIEMENS AG.

    发明人： Ulrike Roesler

    IPC分类号： H01L041/04

    CPC分类号： H03H9/02598 ,  H03H9/0259

    摘要： Substrate lamina made of langasite or langatate with a crystal cut (X1, X2, X3) for langasite in a range around the Euler angle combination (100null, 1400null, 166null) or the Euler angle combinations equivalent thereto, or respectively with special angle combinations of langatate.

    摘要翻译： 在欧拉角组合（100°，1400°，166°）范围内或与其相对应的欧拉角组合的范围内的长方体（X1，X2，X3）由硅藻土或菱镁酸盐制成的底物层 langatate的角度组合。