-
21.发明授权Longitudinal mode fiber acoustic waveguide with solid core and solid cladding 失效具有实芯和固体包层的纵向模式纤维声波导
公开(公告)号：US4743870A
公开(公告)日：1988-05-10
申请号：US910539
申请日：1986-09-23
摘要： An elastic waveguide, for propagating acoustic waves, consists of an elongated solid core region and an elongated solid outer cladding region. The acoustic waves propagate in a mode where the principle particle displacement is substantially parallel to the longitudinal axis of the waveguide, this mode is called longitudinal mode. The material densities and the bulk shear wave velocities of the core and cladding region are substantially the same but the bulk longitudinal wave velocity of the cladding region is larger than that of the core region.
摘要翻译： 用于传播声波的弹性波导由细长的实心芯区域和细长的实心外包层区域组成。 声波以原理粒子位移基本上平行于波导的纵向轴线的方式传播，该模式被称为纵向模式。 芯和包层区域的材料密度和体积剪切波速度基本相同，但是包层区域的体积纵波速度大于核心区域的体积纵波速度。
-
公开(公告)号：US4165498A
公开(公告)日：1979-08-21
申请号：US871850
申请日：1978-01-24
申请人： Masayuki Hongu
发明人： Masayuki Hongu
摘要： A variable delay device for delaying an electrical signal includes a bar-shaped magnetostrictive member to be a transmitting path of a supersonic wave, an input transducer for converting an electric signal into a supersonic wave and an output transducer for converting a supersonic wave into an electric signal, the input and output transducers being provided at at opposite end portions of the magnetostrictive member, and a magnetic field producing device provided between the input and output transducers for supplying the magnetostrictive member with a magnetic field which varies in intensity along the elongated direction of the magnetostrictive member. The magnetic field supplied to the magnetostrictive member is controlled by a control signal applied to the magnetic field producing device to vary the Young's modulus of the magnetostrictive member. As a result, the velocity of the supersonic wave being transmitted therein is varied, to thereby control the delay time of the electric signal.
摘要翻译： 用于延迟电信号的可变延迟装置包括作为超声波的传输路径的棒状磁致伸缩构件，用于将电信号转换为超声波的输入换能器和用于将超声波转换成电气的输出换能器 信号，所述输入和输出换能器设置在所述磁致伸缩构件的相对端部处，以及设置在所述输入和输出换能器之间的磁场产生装置，用于向所述磁致伸缩构件提供沿着所述磁致伸缩构件的细长方向强度变化的磁场 磁致伸缩构件。 提供给磁致伸缩构件的磁场由施加到磁场产生装置的控制信号控制，以改变磁致伸缩构件的杨氏模量。 结果，在其中传输的超声波的速度是变化的，从而控制电信号的延迟时间。
-
23.发明授权
公开(公告)号：US4068141A
公开(公告)日：1978-01-10
申请号：US707137
申请日：1976-07-20
CPC分类号： H03H9/6426 , H01L41/00 , H03H9/1455 , H03H9/30
摘要： An input transducer for surface wave filters having an asymmetrical transfer function comprises two pairs (5 and 6) of interdigital combs disposed side by side on the same piezoelectric substrate staggered by one quarter of the acoustic wavelength, one having a symmetrical transfer function and the other an anti-symmetrical transfer function. The asymmetrical transfer function filter is obtained by summing the two acoustic waves generated by such an input transducer in a wide band output transducer.
摘要翻译： 具有不对称传递函数的表面波滤波器的输入传感器包括两对（5和6）叉指梳并排设置在同一个压电基片上，交错的四分之一波长的波长，一个具有对称的传递函数，另一对具有对称的传递函数 反对称传递函数。 非对称传递函数滤波器是通过对由宽带输出变换器中的这种输入传感器产生的两个声波求和来获得的。
-
公开(公告)号：US3983514A
公开(公告)日：1976-09-28
申请号：US550035
申请日：1975-02-14
申请人： Gerard Coussot
发明人： Gerard Coussot
CPC分类号： H03H9/30 , H03H3/08 , H03H9/02622 , H03H9/02866 , H03H9/133
摘要： The present invention relates to electromechanical devices for the transmission of surface acoustic waves between a launching transducer and a receiving transducer arranged upon the main face of a substrate. The transmission device in accordance with the invention comprises ground zones provided in order to scatter the vibrational energy of bulk waves propagating within the thickness of the substrate. The creation of the ground zones involves the use of a jet of sand directed on to the large faces of the substrate.
摘要翻译： 本发明涉及用于在发射换能器和布置在基底的主面上的接收换能器之间传播表面声波的机电装置。 根据本发明的传动装置包括设置的接地区，以便分散在衬底的厚度内传播的体波的振动能。 地面区域的创建涉及使用指向基底的大面的沙子射流。
-
公开(公告)号：US3955158A
公开(公告)日：1976-05-04
申请号：US446418
申请日：1974-02-27
摘要： A predetermined delay is provided for a microwave input signal by a delay line having a frequency divider circuit including a negative resistance semiconductor device responsive to the microwave input signal and a D.C. bias voltage. The frequency divider circuit converts the input signal at frequency f.sub.1, to a signal at a frequency, f.sub.2, within the operating range of an acoustic delay device coupled to the frequency divider circuit. A frequency multiplier circuit coupled to the acoustic delay device multiplies the frequency, f.sub.2, of the delayed signal from the acoustic device to the frequency, f.sub.1, of the input signal.
摘要翻译： 通过具有分频电路的延迟线为微波输入信号提供预定的延迟，该分频电路包括响应微波输入信号和直流偏置电压的负电阻半导体器件。 分频器电路将频率为f1的输入信号转换成耦合到分频器电路的声学延迟器件的工作范围内的频率为f2的信号。 耦合到声学延迟装置的倍频电路将来自声学装置的延迟信号的频率f2乘以输入信号的频率f1。
-
公开(公告)号：US3789328A
公开(公告)日：1974-01-29
申请号：US3789328D
申请日：1972-06-22
CPC分类号： H03H9/30
摘要： Apparatus for terminating the transmitting line of an acoustical delay line in a tunable cavity having the characteristic impedance of the transmitting line. The cavity is terminated and tunable over the acoustical frequency range by means of selectively located helmholtz resonators operating upon the direct waves and the reflected waves from the terminating device for providing the selectively located resonators to compensate the frequency spectrum for both peaks and dips at different frequencies.
摘要翻译： 用于终止具有传输线的特征阻抗的可调谐腔中的声学延迟线的传输线的装置。 通过在直接波上工作的选择性定位的亥姆霍兹谐振器和来自端接装置的反射波来使空腔终止并在声频范围内可调谐，以提供选择性定位的谐振器，以补偿不同频率下的峰值和下降的频谱 。
-
公开(公告)号：US3752664A
公开(公告)日：1973-08-14
申请号：US3752664D
申请日：1970-10-27
申请人： INST STRAUMANN R AG
发明人： STEINEMANN S
摘要： A METALLIC SOUND TRANSMITTER OR SOUND RADIATOR COMBINES THE LOW ATTENUATION OF A POLYCRYSTALLINE MATERIAL WITH THE MALLEABILITY OF A METAL. THE ATTENUATION COEFFICIENT IS SEEN TO THE DETERMINED BY SOUND SCATTERING IN POLYCRYSTALLINE METALS AS A CONSEQUENCE OF ELASTIC ANISOTROPY WHICH IN TURN IS DETERMINED BY AN ELECTRONIC PROPERTY IN AN ALLOY, SO THAT A LOW COEFFICIENT CAN BE OBTAINED BY PROVIDING ALLOYS OF PREDETERMINED COMPOSITION WHICH HAVE THE APPROPRIATE ELECTRON PER ATOM RATIO.
-
28.发明授权Method of and apparatus for changing frequency power and/or delay time of wave energy 失效改变波动能量和/或延迟时间的方法和装置
公开(公告)号：US3530302A
公开(公告)日：1970-09-22
申请号：US3530302D
申请日：1967-06-14
CPC分类号： H01F10/245 , C04B35/2675 , H01P1/215 , H03F13/00 , H03H9/30 , H03H9/38
摘要： A device for processing electromagnetic wave energy by converting the wave energy to spin waves and/or elastic waves, the present disclosure being particularly directed to the concept of providing a device made up of a single-crystal material which contains non-uniform material parameters to give graded values of material saturation 4 pi Ms. The material discussed in greatest detail is YIG and the non-uniform material parameters are furnished by doping the YIG with gallium. The graded material parameters in combination with an external magnetic bias field H result in an internal magnetic bias field H. The electromagnetic energy as it enters the material is acted upon in a manner that is influenced greatly by the contour of H. The contour of H in the present disclosure, in turn, is predetermined to present gradations in H which will allow the conversion mentioned and which allow predetermination of the wavenumber k of the magnons and/or phonons thereby formed. Furthermore, the place or space within the crystal at which conversion occurs can be somewhat determined by the profile of H thereby provided.
摘要翻译： 一种用于通过将波能转换成旋转波和/或弹性波来处理电磁波能量的装置，本公开特别涉及提供由单晶材料构成的装置的概念，所述单晶材料包含不均匀的材料参数 给出材料饱和度的梯度值4 pi Ms.最详细讨论的材料是YIG，并且通过用镓掺杂YIG来提供不均匀的材料参数。 分级材料参数与外部磁偏置场H结合产生内部磁偏置场H.进入材料时的电磁能受H的大小影响很大。H的轮廓 在本公开中，反过来，预定为呈现H中的灰度，其将允许所提及的转换，并且允许预先确定由此形成的磁子和/或声子的波数k。 此外，发生转换的晶体内的位置或空间可以由提供的H的轮廓确定。
-
公开(公告)号：US3514724A
公开(公告)日：1970-05-26
申请号：US3514724D
申请日：1967-09-18
申请人： TELEDYNE INC
发明人： BENNETT GLENN E , OLSON FRANK A
CPC分类号： H03H9/30
-
公开(公告)号：US3492495A
公开(公告)日：1970-01-27
申请号：US3492495D
申请日：1968-03-28
申请人： UNITED AIRCRAFT CORP
CPC分类号： G02F2/002 , H01S3/1068 , H03H9/30
-
-
-
-
-
-
-
-
-
搜索结果
112 条记录 (耗时 0.013 秒)