公开(公告)号：US6104260A

公开(公告)日：2000-08-15

申请号：US216941

申请日：1998-12-21

申请人： Toru Yamada ,  Shigeru Tsuzuki ,  Hiroyuki Nakamura

发明人： Toru Yamada ,  Shigeru Tsuzuki ,  Hiroyuki Nakamura

IPC分类号： H03H9/00 ,  H03H9/02 ,  H03H9/145 ,  H03H9/64

CPC分类号： H03H9/6453 ,  H03H9/0042 ,  H03H9/6433 ,  H03H9/0285 ,  H03H9/14505 ,  H03H9/14526 ,  H03H9/643

摘要： A surface acoustic wave filter. The filter includes two filter tracks which are parallel to each other. Each track has an input interdigital transducer, reflector and output interdigital transducer. This distance between the input transducer and output transducer is the same in both tracks. The distance between the output transducer and reflector is different in the two tracks. The electrical connection is in opposite phase in either the inputs or outputs, but not both. Electrode fingers are arranged in groups of two and have widths and spacings related to the wavelength.

摘要翻译： 表面声波滤波器。 滤波器包括彼此平行的两个滤波器轨道。 每个轨道都有一个输入叉指式换能器，反射器和输出叉指式换能器。 输入传感器和输出传感器之间的距离在两条轨道上相同。 输出传感器和反射器之间的距离在两条轨道上是不同的。 电气连接在输入或输出端都处于相反的阶段，但不能同时进行。 电极指状物被布置成两组，并且具有与波长相关的宽度和间隔。

公开(公告)号：US5349260A

公开(公告)日：1994-09-20

申请号：US48505

申请日：1993-04-20

申请人： Kimon Anemogiannis ,  Giuliano Visintini

发明人： Kimon Anemogiannis ,  Giuliano Visintini

IPC分类号： H03H9/145 ,  H01L41/04 ,  H03H9/02 ,  H03H9/25 ,  H03H9/64

CPC分类号： H03H9/6446 ,  H03H9/02716 ,  H03H9/02795 ,  H03H9/0285 ,  H03H9/6459 ,  H03H9/6466 ,  H03H9/14532

摘要： A two track surface wave arrangement has improved selection property resulting from crosstalk signals of parasitic transmission paths within the arrangement being suppressed. What can be achieved with a displacement of the surface wave arrangement of one track relative to that of the other track by a dimension of nearly half a wavelength is that crosstalk signals mutually cancel on the basis of interference without affecting the useful signal.

摘要翻译： 两轨迹表面波布置具有改善的选择性能，由选择性质导致的布置中的寄生传输路径的串扰信号被抑制。 通过将一个轨道的表面波布置相对于另一个轨道的表面波布置移位几乎一半的波长可以实现什么是串扰信号基于干扰而相互抵消而不影响有用信号。

公开(公告)号：US4829273A

公开(公告)日：1989-05-09

申请号：US154274

申请日：1988-02-10

申请人： Masao Nozaki ,  Yoshihiro Yasuhara

发明人： Masao Nozaki ,  Yoshihiro Yasuhara

IPC分类号： H03H3/08 ,  H03H9/145 ,  H03H9/64

CPC分类号： H03H9/6489 ,  H03H9/02637 ,  H03H9/0285 ,  H03H9/1452 ,  H03H9/14552

摘要： A frequency characteristic of a surface acoustic wave filter having at least a first transducer and a second transducer is determined by a product of a frequency amplitude characteristic of the first transducer and that of the second transducer so that the electrodes of the both transducers are formed in such a way that third harmonics band in the frequency characteristic of the first transducer is shifted out that of the second transducer in order to prevent third harmonics.

公开(公告)号：US4622525A

公开(公告)日：1986-11-11

申请号：US756510

申请日：1985-07-19

申请人： Roy B. Brown

发明人： Roy B. Brown

IPC分类号： H03H9/02 ,  H03H9/145 ,  H03H9/42 ,  H03H9/76

CPC分类号： H03H9/02771 ,  H03H9/0285

摘要： A surface acoustic wave device in a piezoelectric medium includes input and output transducers for launching and detecting a surface acoustic wave along the piezoelectric medium. The device is arranged in a ring loop to process the bidirectional acoustic wave launched from the input transducer. Multistrip couplers in the ring loop between the input and output transducers are used to achieve low loss characteristics. A phase shift introduced by the multistrip couplers between portions of the surface acoustic wave is used to cancel triple-transit reflections.

摘要翻译： 压电介质中的表面声波装置包括用于沿着压电介质发射和检测表面声波的输入和输出换能器。 该装置布置在环形环中以处理从输入传感器发射的双向声波。 输入和输出传感器之间的环路中的多段耦合器用于实现低损耗特性。 由多声道耦合器在声表面波的部分之间引入的相移用于消除三重透过反射。

公开(公告)号：US4392116A

公开(公告)日：1983-07-05

申请号：US196247

申请日：1980-10-14

申请人： Adrian J. De Vries

发明人： Adrian J. De Vries

IPC分类号： H03H9/02 ,  H03H9/64 ,  H03H9/42

CPC分类号： H03H9/0285

摘要： In order to suppress triple transit ghost images in a T.V. receiver, a surface wave acoustic filter is provided in which either the input or output transducer system, or both, includes both primary and dummy transducers, the echoes from which cancel each other totally. The dummy transducer is designed as a function not only of position along the acoustic beam path, but also as a function of the number of elemental transducers and their interdigitated lengths; and the design also takes into account relevant electrical parameters including transducer admittances and any external or parasitic impedances under short circuit and open circuit conditions. These factors are taken into account not only for the primary transducer, but also for the dummy transducer. The result is a completely general phasor expression which establishes the design criteria for a dummy transducer to achieve echo phase opposition and amplitude equality, relative to a given primary transducer and a given external circuit under all frequency conditions. The result is complete echo cancellation over the entire bandwidth of the filter.

摘要翻译： 为了抑制T.V.接收机中的三重转接重影，提供表面波声滤波器，其中输入或输出换能器系统或两者包括主换能器和虚拟换能器，其中完全相互抵消的回波。 虚拟换能器不仅被设计为不仅沿着声束路径的位置的功能，而且还被设计为元素换能器的数量及其相互交叉的长度的函数; 并且该设计还考虑了相关的电气参数，包括在短路和开路条件下的换能器导纳和任何外部或寄生阻抗。 这些因素不仅对于主换能器，而且还用于虚拟换能器。 结果是完全一般的相量表达式，其建立虚拟换能器的设计标准，以实现在所有频率条件下相对于给定的主换能器和给定的外部电路的回波相位和幅度相等。 结果是在滤波器的整个带宽上完成了回波消除。

公开(公告)号：US4258342A

公开(公告)日：1981-03-24

申请号：US69320

申请日：1979-08-24

申请人： Hajime Miyajima ,  Akio Nakakura

发明人： Hajime Miyajima ,  Akio Nakakura

IPC分类号： H03H3/08 ,  H03H9/02 ,  H03H9/145 ,  H03H9/25 ,  H03H9/42 ,  H03H9/64

CPC分类号： H03H9/14552 ,  H03H9/0285

摘要： An elastic surface wave device including interdigital finger electrodes comprising interdigital fingers each of which consists of a pair of divided finger elements having an equal width. The spacing between adjacent ones of the interdigital fingers is equal to the spacing between the pair of divided finger elements thereof. Importantly, at least one of the interdigital fingers is differentiated from the remainder of the interdigital fingers in respect of the distance from the center of the spacing between one of the interdigital fingers and that one of the interdigital fingers which is adjacent thereto on one side to the center of the spacing between the aforementioned one interdigital finger and that one of the interdigital fingers which is adjacent thereto on the other side. Furthermore, the interdigital finger electrode is designed such that the width of the respective finger elements is equal to the spacing therebetween. Such an interdigital finger element may be employed for one of the input and output electrodes of the device. Still furthermore, the spacing between adjacent ones of the interdigital fingers and the spacing between the pair of finger elements in the input electrode are made equal to those in the output electrode, respectively.

摘要翻译： 一种弹性表面波装置，包括叉指指状电极，其包括叉指，每根指状物由一对具有相等宽度的分开的指状元件组成。 叉指间相邻的间隔相当于一对分割指状元件之间的间隔。 重要的是，叉指中的至少一个与叉指的其余部分相对于从一个指指之间的间隔的距离的中心与在一侧上与之相邻的指指之间的距离不同 上述一个叉指之间的间隔的中心与在另一侧相邻的指指之间的间隔的中心。 此外，叉指指状电极被设计成使得各指状元件的宽度等于它们之间的间隔。 这种叉指指状元件可用于装置的输入和输出电极之一。 此外，相互之间的叉指之间的间隔和输入电极中的一对指状元件之间的间隔分别与输出电极中的相等。

公开(公告)号：US4047130A

公开(公告)日：1977-09-06

申请号：US718249

申请日：1976-08-27

申请人： Teong C. Lim ,  Umit Tarakci ,  Carmine F. Vasile

发明人： Teong C. Lim ,  Umit Tarakci ,  Carmine F. Vasile

IPC分类号： H03H9/02 ,  H03H9/04 ,  H03H9/26 ,  H03H9/30 ,  H03H9/32

CPC分类号： H03H9/02543 ,  H03H9/0285 ,  H03H9/0296

摘要： A surface acoustic wave filter has a Lithiumniobate substrate of parallelogram configuration, which is bonded to a header having similar acoustic impedance. The substrate has three transducers arranged along its long sides at particular spacings destined to suppress triple transit echoes. The short sides are oblique and surface portions adjacent thereto are covered by surface waves attenuating paddings. Two such filters are cascaded on the same header.

摘要翻译： 表面声波滤波器具有平行四边形构造的铌酸锂基板，其结合到具有相似声阻抗的集管。 衬底具有沿其长边布置的三个换能器，其特定间隔旨在抑制三次运转回波。 短边是倾斜的，与其相邻的表面部分被表面波衰减的垫片覆盖。 两个这样的过滤器级联在同一个标​​题上。

公开(公告)号：US3800247A

公开(公告)日：1974-03-26

申请号：US15592071

申请日：1971-06-23

申请人： RAYTHEON CO

发明人： TANCRELL R ,  MEYER P

IPC分类号： H03H9/02 ,  H03H9/145 ,  H03H9/44 ,  H03H7/30

CPC分类号： H03H9/1452 ,  G01S13/282 ,  H03H9/0285 ,  H03H9/14555 ,  H03H9/14594 ,  H03H9/44

摘要： A surface wave electrode structure in which an apodized interdigital surface array is tilted with respect to the direction of propagation of the surface wave, for example, by having the individual digital fingers extend perpendicular to the direction of propagation but having the locus of their midpoints lie on a path at an angle to the direction of propagation.

摘要翻译： 一种表面波电极结构，其中变迹指数指数阵列相对于表面波的传播方向倾斜，例如通过使各个数字手指垂直于传播方向延伸但具有其中点的轨迹位于 在与传播方向成一定角度的路径上。

公开(公告)号：US5663695A

公开(公告)日：1997-09-02

申请号：US558607

申请日：1995-10-31

申请人： Mitsuhiro Tanaka ,  Susumu Nomoto ,  Masahiko Sugiyama ,  Kenji Suzuki

发明人： Mitsuhiro Tanaka ,  Susumu Nomoto ,  Masahiko Sugiyama ,  Kenji Suzuki

IPC分类号： H03H9/00 ,  H03H9/02 ,  H03H9/145 ,  H03H9/64

CPC分类号： H03H9/0042 ,  H03H9/02779 ,  H03H9/0285 ,  H03H9/14505 ,  H03H9/1452 ,  H03H9/14552 ,  H03H9/6426 ,  H03H9/643

摘要： A surface acoustic wave filter device suitable for CDMA communication system includes a piezoelectric substrate, and a unidirectional input side transducer and a bidirectional output side transducer are formed on the substrate. The filter device has satisfactory filtering characteristics in terms of insertion loss, frequency characteristics, T.T.E. attenuation level, group delay time, etc.

摘要翻译： 适用于CDMA通信系统的表面声波滤波器装置包括压电基板，单向输入侧换能器和双向输出侧换能器形成在基板上。 滤波器装置在插入损耗，频率特性T.T.E.方面具有令人满意的滤波特性。 衰减水平，组延迟时间等

公开(公告)号：US5475348A

公开(公告)日：1995-12-12

申请号：US211622

申请日：1994-04-18

申请人： Jean-Michel Hode ,  Jean Desbois ,  Marc Solal

发明人： Jean-Michel Hode ,  Jean Desbois ,  Marc Solal

IPC分类号： H03H9/00 ,  H03H9/02 ,  H03H9/145 ,  H03H9/64

CPC分类号： H03H9/0057 ,  H03H9/02653 ,  H03H9/0285 ,  H03H9/02905

摘要： It consists of several channels (V1, V2) in parallel, which exhibit an inter-transducer gap difference (2.sub.1 -4.sub.1 ; 2.sub.2 -4.sub.2) equal to an even multiple of the half-wavelength (.lambda.) at the central frequency, from one channel to the next, so as to cancel the delay line transfer function which corresponds to the direct path between transducers.

摘要翻译： PCT No.PCT / FR92 / 00827 Sec。 371日期1994年04月18日 102（e）1994年4月18日PCT PCT日期：1992年10月28日PCT公布。 公开号WO93 / 08641 日期为1993年04月29日。它由并行的多个通道（V1，V2）组成，它们具有等于半波长（λ）的偶数倍的换能器间差（21-41; 22-42） 在中心频率，从一个通道到下一个通道，以消除对应于换能器之间的直接路径的延迟线传递函数。