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    SURFACE ACOUSTIC WAVE SENSOR DEVICE
    1.
    发明公开
    SURFACE ACOUSTIC WAVE SENSOR DEVICE 审中-公开

    公开(公告)号：US20240159710A1

    公开(公告)日：2024-05-16

    申请号：US18548847

    申请日：2022-03-03

    申请人： FREC'N'SYS

    发明人： Sylvain BALLANDRAS ,  Thierry LAROCHE ,  Julien GARCIA ,  Emilie COURJON

    IPC分类号： G01N29/02 ,  H03H9/145 ,  H03H9/25

    CPC分类号： G01N29/022 ,  H03H9/14502 ,  H03H9/25 ,  G01N2291/0422

    摘要： An acoustic wave sensor device comprises a first interdigitated transducer, a first reflection structure, a second reflection structure, a first resonance cavity comprising a first upper surface and formed between the first interdigitated transducer and the first reflection structure, and a second resonance cavity comprising a second upper surface and formed between the first interdigitated transducer and the second reflection structure. At least one of the first and second upper surfaces is covered at least partly by a metalization layer or a passivation layer. The present invention relates also to an acoustic wave sensor assembly.

    End fire surface wave piezoelectric transducer
    5.
    发明授权
    End fire surface wave piezoelectric transducer 失效
    端面火波表面波压电换能器

    公开(公告)号：US3938062A

    公开(公告)日：1976-02-10

    申请号：US567048

    申请日：1975-04-10

    申请人： Theodore H. Hopp

    发明人： Theodore H. Hopp

    IPC分类号： H03H9/145 ,  H03H9/02 ,  H01L41/10 ,  H03H9/20 ,  H03H9/26

    CPC分类号： H03H9/1455 ,  H03H9/14502

    摘要： An acoustic surface wave transducer characterized by a novel electrode coguration. A pair of electrode strips are positioned on the surface of a piezoelectric material, each of the strips having elongate fingers extending laterally towards one another. The fingers from the opposed electrode strips are aligned with one another, as opposed to the common interdigitated structure of the prior art. The fingers have a prescribed spacing from adjacent fingers as well as from opposed fingers. The prescribed configuration causes the electric field between corresponding fingers to peak at the points between the ends of the fingers which, in turn, causes high shear stresses to occur and be reinforced as the acoustic wave travels down the length of the material. The basic transducer generates a point source of acoustic waves. An extension of the basic embodiment utilizes an array of transducers having electrode pairs in the prescribed configuration and which are configured with respect to one another so as to render the point sources additive which yields a plane wave front.

    摘要翻译： 一种声表面波换能器，其特征在于新颖的电极结构。 一对电极条定位在压电材料的表面上，每个条具有细长的指状物，横向朝彼此延伸。 相对于现有技术的共同的叉指结构，来自相对电极条的指状物彼此对准。 手指具有相邻指状物以及相对的指状物的规定间隔。 规定的配置使得相应手指之间的电场在指状物的端部之间的点处达到峰值，这又引起高的剪切应力发生，并且随着声波沿着材料的长度行进而被加强。 基本传感器产生声波的点源。 基本实施例的延伸部使用具有规定构造的电极对的换能器阵列，并且相对于彼此配置，以便产生产生平面波前的点源添加。

    One-port surface elastic wave resonator on high permittivity substrate
    9.
    发明申请
    One-port surface elastic wave resonator on high permittivity substrate 审中-公开
    高介电常数衬底上的单端面弹性波谐振器

    公开(公告)号：US20170033840A1

    公开(公告)日：2017-02-02

    申请号：US15222506

    申请日：2016-07-28

    申请人： SENSEOR

    发明人： Sylvain BALLANDRAS ,  Sébastien ALZUAGA

    IPC分类号： H04B5/00 ,  H03H9/145 ,  H03H9/25 ,  H03H9/02 ,  H03H9/19 ,  H03H9/17

    CPC分类号： H04B5/0056 ,  G01K11/265 ,  G06K19/0675 ,  H03H9/02275 ,  H03H9/02535 ,  H03H9/0259 ,  H03H9/14502 ,  H03H9/175 ,  H03H9/19 ,  H03H9/25

    摘要： A surface elastic wave resonator comprises a piezoelectric material to propagate the surface elastic waves and a transducer inserted between a pair of reflectors comprising combs of interdigitated electrodes and having a number Nc of electrodes connected to a hot spot and an acoustic aperture W wherein the relative permittivity of the piezoelectric material is greater than about 15, a product of Nc·W/fa for the transducer being greater than 100 μm·MHz−1, where fa is the antiresonance frequency of the resonator. A circuit comprises a load impedance and a resonator according to the invention and having an electrical response manifesting as a peak in the coefficient of reflection S11 at a frequency of a minimum value of the parameter S11 that is lower than −10 dB, the antiresonance peak of the resonator being matched to the impedance of the load.

    摘要翻译： 表面弹性波谐振器包括用于传播表面弹性波的压电材料和插入在一对反射器之间的换能器，所述反射器包括交错电极梳和具有连接到热点的数量Nc的电极和声孔W，其中相对介电常数 的压电材料大于约15，传感器的Nc·W / fa的乘积大于100·MHz-1，其中fa是谐振器的反谐振频率。 电路包括根据本发明的负载阻抗和谐振器，并且具有以低于-10dB的参数S11的最小值的频率表现为反射系数S11中的峰值的电响应，反谐振峰 的谐振器与负载的阻抗匹配。

    Surface acoustic wave device, and demodulating apparatus and communication system using the surface acoustic wave device
    10.
    发明授权
    Surface acoustic wave device, and demodulating apparatus and communication system using the surface acoustic wave device 失效
    表面声波装置，以及使用表面声波装置的解调装置和通信系统

    公开(公告)号：US5353304A

    公开(公告)日：1994-10-04

    申请号：US183255

    申请日：1994-01-19

    申请人： Norihiro Mochizuki

    发明人： Norihiro Mochizuki

    IPC分类号： H03H9/145 ,  H03H9/64 ,  H04B1/707 ,  H01L41/04

    CPC分类号： H03H9/6406 ,  H03H9/14502 ,  H04B1/70712

    摘要： In a surface acoustic wave device, there are arranged a piezoelectric substrate, an input electrode and an output electrode. The input electrode is formed on the substrate, and generates a surface acoustic wave propagated in a predetermined direction, in accordance with an input signal. The output electrode is also formed on the substrate, and converts the surface acoustic wave to an electric signal. One of the input and output electrodes includes a plurality of taps equidistantly arranged in a propagation direction of the surface acoustic wave. The other one of the input and output electrodes may comprise a pair of taps arranged at a predetermined distance in the propagation direction. The electrode including a plurality of taps or the electrode including a pair of taps satifies a predetermined relation established among a length between the taps, a transmission speed of the input signal, a propagation velocity of the surface acoustic wave and so forth. According to such a structure, two bits of the signal can be processed without a delay circuit. A demodulating device and a communication system respectively include the surface acoustic wave device so that a circuit structure can be simplified and that data can be reproduced with a high signal quality.

    摘要翻译： 在表面声波装置中，设置有压电基板，输入电极和输出电极。 输入电极形成在基板上，并且根据输入信号产生沿预定方向传播的表面声波。 输出电极也形成在基板上，并将表面声波转换为电信号。 输入和输出电极之一包括沿声表面波的传播方向等距布置的多个抽头。 输入和输出电极中的另一个可以包括在传播方向上以预定距离布置的一对抽头。 包括多个抽头的电极或包括一对抽头的电极饱和在抽头之间的长度，输入信号的传输速度，表面声波的传播速度等之间建立的预定关系。 根据这样的结构，可以在没有延迟电路的情况下处理信号的两位。 解调装置和通信系统分别包括表面声波装置，使得可以简化电路结构，并且可以以高信号质量再现数据。