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    Acoustic wave device, ladder filter and radio incorporating same and method
    1.
    发明公开
    Acoustic wave device, ladder filter and radio incorporating same and method 失效
    表面声波装置，梯形滤波器和含有它的无线电，以及程序

    公开(公告)号：EP0792018A2

    公开(公告)日：1997-08-27

    申请号：EP97102281.9

    申请日：1997-02-13

    申请人： MOTOROLA, INC.

    发明人： Hickernell, Thomas

    IPC分类号： H03H9/25

    CPC分类号： H03H9/6483 ,  H03H9/25

    摘要： A method and apparatus for a ladder filter (400) incorporating same. The filter (400) includes a substrate and a first series resonator (100, 403) disposed on the substrate and electrically coupled in series between the first electrical port (401) and a first node. The first series resonator (100, 403) includes a first series acoustic reflector (115), a first series gap (112), a first series transducer (105, 403), a second series gap (112) and a second series acoustic reflector (115') collectively disposed in an in-line configuration along a principal axis of the substrate. The filter (400) also includes a first shunt resonator (100, 404) disposed on the substrate and electrically coupled in shunt between the first node and ground. The first shunt transducer (105, 404) and the first series transducer (105, 403), if reflectors (115, 115') are included, have an optimized number of reflective elements (116, 116') included therein.

    Low loss wide bandwidth parallel channel acoustic filter
    3.
    发明公开
    Low loss wide bandwidth parallel channel acoustic filter 失效
    Bre。。。。。。。ches。。。。。。。。。。。。

    公开(公告)号：EP0545672A1

    公开(公告)日：1993-06-09

    申请号：EP92310969.8

    申请日：1992-12-01

    申请人： MOTOROLA, INC.

    发明人： Cho, Frederick Y. ,  Hickernell, Thomas ,  Penunuri, David

    IPC分类号： H03H9/64 ,  H03H9/145

    CPC分类号： H03H9/0285 ,  H03H9/14505 ,  H03H9/1452 ,  H03H9/6433 ,  H03H9/6469

    摘要： An acoustic wave filtering apparatus includes an acoustic wave propagating substrate (120) for supporting propagation of acoustic waves and a plurality of acoustic wave filters (217, 219) for filtering an electrical signal. Each of said plurality further comprises an input (201) for supplying electrical input signals, an input unidirectional acoustic wave transducer (203, 205, 250; 223, 225, 260) for converting electrical signal energy into acoustic energy, an output unidirectional acoustic wave transducer (210, 213, 255; 230, 233, 265) for converting acoustic signals to electrical signals, and an output (215) for combining and delivering electrical output signals to external electrical apparatus.

    摘要翻译： 声波滤波装置包括用于支撑声波传播的声波传播基板（120）和用于滤波电信号的多个声波滤波器（217,219）。 所述多个还包括用于提供电输入信号的输入端（201），用于将电信号能量转换为声能的输入单向声波换能器（203,205,250; 223,225,260），输出单向声波 用于将声信号转换为电信号的换能器（210,213,255; 230,233,265），以及用于将电输出信号组合并输送到外部电气设备的输出端（215）。

    Method and apparatus for an acoustic wave filter
    6.
    发明公开
    Method and apparatus for an acoustic wave filter 失效
    Verfahren und Vorrichtungfürein akustischesOberflächenwellenfilter。

    公开(公告)号：EP0564881A1

    公开(公告)日：1993-10-13

    申请号：EP93104635.3

    申请日：1993-03-22

    申请人： MOTOROLA, INC.

    发明人： Hickernell, Thomas ,  Penunuri, David

    IPC分类号： H03H9/145 ,  H03H9/64

    CPC分类号： H03H9/14505 ,  H03H9/02779 ,  H03H9/02913 ,  H03H9/02921

    摘要： A low-loss acoustic wave filter (201, 301) includes a piezoelectric substrate (120), a first strongly unidirectional acoustic wave transducer (220, 240, 320, 360) and a second strongly unidirectional acoustic wave transducer (220, 240, 320, 360). Each of the first and second strongly unidirectional acoustic wave transducers (220, 240, 320, 360) are acoustically coupled to one another. Each of the first and second strongly unidirectional acoustic wave transducers (220, 240, 320, 360) further comprises an acoustic wave reflector (605', 615, 625, 635, 640, 650) and a weakly unidirectional acoustic wave transducer (409, 603). The acoustic wave reflector (605', 615, 625, 635, 640, 650) and the weakly unidirectional acoustic wave transducer (409, 603) are coupled to the piezoelectric substrate (120).

    摘要翻译： 低损耗声波滤波器（201,301）包括压电基板（120），第一强单向声波换能器（220,240,320,360）和第二强单向声波换能器（220,240,320 ，360）。 第一和第二强单向声波换能器（220,240,320,360）中的每一个彼此声学耦合。 第一和第二强单向声波换能器（220,240,320,360）中的每一个还包括声波反射器（605'，615,625,635,640,650）和弱单向声波换能器（409， 603）。 声波反射器（605'，615,625,635,640,650）和弱单向声波换能器（409,603）耦合到压电基片（120）。

    Acoustic wave device
    7.
    发明公开
    Acoustic wave device 失效
    Akustische Wellenanordnung。

    公开(公告)号：EP0530547A1

    公开(公告)日：1993-03-10

    申请号：EP92113615.6

    申请日：1992-08-10

    申请人： MOTOROLA, INC.

    发明人： Hickernell, Thomas ,  Penunuri, David ,  Cho, Frederick Y.

    IPC分类号： H03H9/02 ,  H03H9/64

    CPC分类号： H03H9/02637 ,  H03H9/02653

    摘要： An acoustic wave device (501) comprises an acoustic wave transducer (510, 520) coupled to an acoustic wave propagating substrate (120). The acoustic wave transducer (510, 520) converts signal energy between electrical and acoustical forms. Acoustic reflectors (530, 540) are placed one on either side of the acoustic wave transducer (510, 520). The acoustic reflectors (530, 540) are composed of acoustic reflection elements (544) spaced approximately one acoustic wavelength apart, and provide enhanced acoustic acoustic reflections together with relaxed fabrication constraints.

    摘要翻译： 声波装置（501）包括耦合到声波传播基板（120）的声波换能器（510,520）。 声波换能器（510,520）在电和声学形式之间转换信号能量。 声波反射器（530,540）放置在声波换能器（510,520）的两侧。 声反射器（530,540）由隔开大约一个声波波长的声反射元件（544）组成，并且提供增强的声学反射以及松散的制造约束。