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1. 发明授权

US06291924B1 Adjustable saw device 有权
标题翻译：可调锯机
公开(公告)号：US06291924B1
公开(公告)日：2001-09-18
申请号：US09346081
申请日：1999-07-01
申请人： Kei-Fung Lau , Robert B. Stokes , Kuo-Hsiung Yen , Alvin M. Kong , Steven E. Housholder , Ronald D. Kasparek
发明人： Kei-Fung Lau , Robert B. Stokes , Kuo-Hsiung Yen , Alvin M. Kong , Steven E. Housholder , Ronald D. Kasparek
IPC分类号： H01L4108
CPC分类号： H03H9/145
摘要： An adjustable surface acoustic wave (SAW) transducer is fabricated on a piezoelectric substrate. The adjustable SAW transducer includes a plurality of SAW interdigital transducer (IDT) fingers disposed on the substrate. Miniature switches are used to provide a plurality of interconnection patterns between the SAW IDT fingers such that a plurality of SAW characteristics can be generated from a single set of SAW IDT fingers.
摘要翻译：在压电基片上制作可调声表面波（SAW）传感器。可调谐SAW换能器包括设置在基板上的多个SAW叉指换能器（IDT）指状物。微型开关用于在SAW IDT指状物之间提供多个互连图案，使得可以从单组SAW IDT手指产生多个SAW特性。

2. 发明授权

US4513261A Low-loss acoustic wave filter device 失效
标题翻译：低损耗声波滤波器
公开(公告)号：US4513261A
公开(公告)日：1985-04-23
申请号：US493917
申请日：1983-05-12
申请人： Kuo-Hsiung Yen , Robert B. Stokes , Kei-Fung Lau , Alvin M. Kong , Reynold S. Kagiwada
发明人： Kuo-Hsiung Yen , Robert B. Stokes , Kei-Fung Lau , Alvin M. Kong , Reynold S. Kagiwada
IPC分类号： H03H9/02 , H03H9/64 , H03H9/145
CPC分类号： H03H9/6426 , H03H9/027 , H03H9/0285 , H03H9/14552
摘要： An acoustic wave filter device with low loss and low passband ripple characteristics. The filter comprises three bidirectional electroacoustical transducers disposed along a common axis on the surface of a substrate of piezoelectric material. The two outer transducers of the three function as input transducers and the center transducer functions as an output transducer. One of the input transducers is of the antisymmetric type and has a transfer characteristic that differs in phase angle by ninety degrees with respect to the other input transducer, which is of the symmetric type. This ninety-degree difference applies at all frequencies, so that any energy reflected from the output transducer and again reflected by an input transducer will be subject to a phase shift of 180 degrees in the case of energy reflected from the antisymmetric input transducer, and no phase shift in the case of the symmetric input transducer. Accordingly, these triple-transit echoes will cancel at the output transducer, for all frequencies. For the primary energy propagation from the input transducers to the output transducer, a ninety-degree phase shifter in one input circuit ensures that the signals from the two input transducers are in phase when they reach the output transducer.
摘要翻译：具有低损耗和低通带纹波特性的声波滤波器件。该滤波器包括沿着压电材料的基板的表面上的公共轴设置的三个双向电声换能器。三个功能的两个外部传感器作为输入传感器，中心传感器用作输出传感器。输入换能器中的一个具有反对称型，并且具有相对于对称型的另一输入换能器将相位角相差九十度的传递特性。这个九十度的差异适用于所有的频率，所以从反输入传感器反射的能量的情况下，从输出传感器反射并再次被输入传感器反射的任何能量将经历180度的相移，而没有在对称输入传感器的情况下的相移。因此，对于所有频率，这些三重传输回波将在输出传感器处消除。对于从输入传感器到输出传感器的一次能量传播，一个输入电路中的九十度移相器确保来自两个输入传感器的信号在到达输出传感器时处于同相状态。

3. 发明授权

US4707631A Isotropic acoustic wave substrate 失效
标题翻译：各向同性声波衬底
公开(公告)号：US4707631A
公开(公告)日：1987-11-17
申请号：US886457
申请日：1986-07-17
申请人： Robert B. Stokes , Kuo-Hsiung Yen , Kei-Fung Lau , Reynold S. Kagiwada , Michael J. Delaney
发明人： Robert B. Stokes , Kuo-Hsiung Yen , Kei-Fung Lau , Reynold S. Kagiwada , Michael J. Delaney
IPC分类号： H03H3/08 , H03H9/02 , H03H9/145 , H01L41/08
CPC分类号： H03H9/1455 , H03H3/08 , H03H9/02559
摘要： A surface acoustic wave (SAW) diffraction-effect or interference-effect device with a highly isotropic substrate having a high coupling coefficient and low attenuation losses. The use of X-propagating rotated-Y-cut lithium niobate as the SAW substrate, with the Y rotation angle selected at 121 degrees, provides a practically isotropic material, with a high coupling coefficient and relatively low attenuation losses.
摘要翻译：具有高耦合系数和低衰减损耗的高均相衬底的表面声波（SAW）衍射效应或干涉效应器件。使用X传播的旋转Y型切割铌酸锂作为SAW基片，其中Y旋转角度选择为121度，提供实际上各向同性的材料，具有高耦合系数和相对低的衰减损耗。

4. 发明授权

US4947073A Saw channelized filters 失效
标题翻译：锯通道化过滤器
公开(公告)号：US4947073A
公开(公告)日：1990-08-07
申请号：US152127
申请日：1988-02-04
申请人： Robert B. Stokes , Kuo-Hsiung Yen , Kei-Fung Lau
发明人： Robert B. Stokes , Kuo-Hsiung Yen , Kei-Fung Lau
IPC分类号： H03H9/70 , H03H9/72
CPC分类号： H03H9/72
摘要： A surface acoustic wave (SAW) device and a related method, for providing improved frequency response characteristics from a SAW spectrum analyzer or channelizer. The device includes a spectrum analyzer with a preprocessing SAW device configured to provide output signals with narrower passbands, lower sidelobe components, or both. The preprocessing SAW device is a tapped delay line in one embodiment, to simulate positional offsets in the placement of input transducers of the analyzer. The tapped delay line can also be used to provide amplitude weighting or can be configured in a chirp spacing, to transform the spectrum analyzer into a chirp analyzer. Another embodiment employs a thinned-electrode prefilter as the preprocessing device, to yield a frequency response with multiple narrow passbands, which are used to narrow the individual channel passbands of the spectrum analyzer or to suppress sidelobes in the frequency response.
摘要翻译：一种表面声波（SAW）器件和相关方法，用于从SAW频谱分析仪或通道化器提供改进的频率响应特性。该装置包括具有预处理SAW器件的频谱分析器，其被配置为提供具有较窄通带，较低旁瓣分量或两者的输出信号。在一个实施例中，预处理SAW器件是抽头延迟线，以模拟分析器的输入换能器的放置位置偏移。抽头延迟线还可以用于提供幅度加权或者可以以啁啾间隔配置，以将频谱分析仪转换成啁啾分析仪。另一实施例采用薄电极预滤器作为预处理装置，以产生具有多个窄通带的频率响应，其用于缩小频谱分析仪的各个通道通带或抑制频率响应中的旁瓣。

5. 发明授权

US4499393A Surface acoustic wave spectrum analyzer 失效
标题翻译：表面声波频谱分析仪
公开(公告)号：US4499393A
公开(公告)日：1985-02-12
申请号：US580575
申请日：1984-02-15
申请人： Robert B. Stokes , Kuo-Hsiung Yen , Kei-Fung Lau , Reynold S. Kagiwada , Michael J. Delaney
发明人： Robert B. Stokes , Kuo-Hsiung Yen , Kei-Fung Lau , Reynold S. Kagiwada , Michael J. Delaney
IPC分类号： G01H3/04 , G01H3/08 , G01R23/02 , G01R23/16 , G01R23/17 , H03H9/145 , H03H9/64 , H03H9/25 , H01L41/08
CPC分类号： G01R23/17 , H03H9/1455
摘要： A surface acoustic wave (SAW) device configured to operate as a spectrum analyzer, and having an array of input transducers disposed on a substrate in such positions as to produce a focused beam of acoustic energy at a focal arc, each position on the arc being representative of an input signal frequency. Output transducers produce electrical signals corresponding to the energy received at successive segments of the focal arc. The disclosed device includes various combinations of input transducer array improvements, some of which are to provide amplitude weighting of the input array, including aperture width weighting, capacitive weighting, resistive weighting, series-parallel weighting, and source withdrawal weighting. Another improvement in input array configuration eliminates close or overlapping electrodes of opposite polarities and thereby reduces parasitic capacitance and acoustic radiation between electrode elements. The use of curved input transducer fingers improves operation of the transducers as point sources. Other important improvements include the use of acoustic transducers before to transmit the focused output energy from the focal line to conventional output transducers, thereby improving frequency resolution, and the use of electromagnetic waveguides to transmit energy from output transducers located on the focal line.
摘要翻译：一种表面声波（SAW）装置，被配置为作为频谱分析仪进行操作，并且具有设置在基板上的输入换能器阵列，以便在聚焦弧处产生聚焦的能量束的位置，弧上的每个位置代表输入信号频率。输出换能器产生对应于在焦弧的连续段处接收的能量的电信号。所公开的设备包括输入换能器阵列改进的各种组合，其中一些是提供输入阵列的幅度加权，包括孔径宽度加权，电容加权，电阻加权，串联并行加权和源提取加权。输入阵列配置的另一改进消除了相反极性的紧密或重叠的电极，从而减小电极元件之间的寄生电容和声辐射。使用弯曲的输入传感器手指改善了作为点源的换能器的操作。其他重要的改进包括在将聚焦输出能量从焦线传输到常规输出换能器之前使用声换能器，从而提高频率分辨率，以及使用电磁波导从位于焦线上的输出换能器传输能量。

6. 发明授权

US4249146A Surface acoustic wave resonators utilizing harmonic frequencies 失效
标题翻译：利用谐波频率的表面声波谐振器
公开(公告)号：US4249146A
公开(公告)日：1981-02-03
申请号：US14393
申请日：1979-02-23
申请人： Kuo-Hsiung Yen , Kei-Fung Lau , Reynold S. Kagiwada
发明人： Kuo-Hsiung Yen , Kei-Fung Lau , Reynold S. Kagiwada
IPC分类号： H03H9/25 , H03H9/145 , H03H9/64 , H04R17/10
CPC分类号： H03H9/25
摘要： A surface acoustic resonator including an interdigital transducer configured to generate acoustic waves at at least one harmonic frequency, and a pair of reflection gratings capable of essentially total reflection of the acoustic waves in both fundamental and harmonic modes of operation. One-port and two-port resonators are disclosed, capable of operation at fundamental and harmonic frequencies, to provide a higher frequency of operation without correspondingly higher resolution requirements for manufacturing processes. For single-mode operation at higher frequencies, the interdigital transducer and reflection gratings have different fundamental frequencies, and utilize harmonics of different order but the same actual frequency, such that the resonator functions at a single frequency, which may be, for example, the third harmonic with respect to the transducer fundamental frequency, and the second harmonic with respect to the reflection grating-fundamental frequency.
摘要翻译：一种表面声谐振器，包括配置成产生至少一个谐波频率的声波的叉指换能器，以及能够在基本和谐波运行模式中基本上完全反射声波的反射光栅。公开了能够在基波和谐波频率下操作的单端口和双端口谐振器，以提供更高的操作频率，而无需相应的制造过程更高的分辨率要求。对于在较高频率下的单模操作，叉指式换能器和反射光栅具有不同的基频，并且利用不同阶数但相同的实际频率的谐波，使得谐振器在单个频率下起作用，其可以是例如相对于换能器基频的三次谐波，相对于反射光栅基频的二次谐波。

7. 发明授权

US5179309A Surface acoustic wave chirp filter 失效
标题翻译：表面声波啁啾滤波器
公开(公告)号：US5179309A
公开(公告)日：1993-01-12
申请号：US152203
申请日：1988-02-04
申请人： Robert B. Stokes , Kuo-Hsiung Yen , Jeffrey H. Elliott
发明人： Robert B. Stokes , Kuo-Hsiung Yen , Jeffrey H. Elliott
IPC分类号： H03H9/145 , H03H9/42
CPC分类号： H03H9/72 , H03H9/14547 , H03H9/14555 , H03H9/14561 , H03H9/14564 , H03H9/44
摘要： A surface acoustic wave (SAW) chirp signal processor having a piezoelectric substrate, an array of input transducers and an array of output transducers. In its chirp compression mode, the device has chirp signals applied in parallel to its input transducers and produces compressed output pulses at its output transducers, corresponding to selected chirp rates. The input transducers are successively offset with respect to a focal point on the array of output transducers, by distances that successively and linearly increase or decrease from transducer to transducer, consistent with the increase or decrease in the wavelength of the chirp signals. The device may also be used in a pulse expansion mode, by inputting a broadband pulse into a selected one of the output transducers. The input transducers then produce a chirp signal having a rate corresponding the selected to output transducer.
摘要翻译：具有压电衬底的表面声波（SAW）线性调频信号处理器，输入换能器阵列和输出换能器阵列。在其啁啾压缩模式下，该装置具有与其输入换能器并联的啁啾信号，并在其输出的换能器处产生对应于所选啁啾率的压缩输出脉冲。输入换能器相对于输出换能器阵列上的焦点，依据线性调频脉冲信号的波长的增加或减小，连续地从换能器到换能器逐渐增加或减少的距离偏移。该装置还可以以脉冲扩展模式使用，通过将宽带脉冲输入到选定的一个输出换能器中。然后，输入换能器产生具有对应于所选输出换能器的速率的啁啾信号。

8. 发明授权

US4716390A Magnetostatic wave channelizer 失效
标题翻译：静电波通道器
公开(公告)号：US4716390A
公开(公告)日：1987-12-29
申请号：US907546
申请日：1986-09-15
申请人： Jeffrey H. Elliott , Robert B. Stokes , David Penunuri , Kuo-Hsiung Yen
发明人： Jeffrey H. Elliott , Robert B. Stokes , David Penunuri , Kuo-Hsiung Yen
IPC分类号： H03H2/00 , H01P1/20 , H01P1/213
CPC分类号： H03H2/001
摘要： A magnetostatic wave (MSW) device for performing spectral analysis of an input signal containing signal components of very high frequency, well in excess of 1 GHz (gigahertz). An input transducer array couples the input signal to a magnetostatic propagating medium, such as a film of yttrium-iron-garnet (YIG), in such a manner that the array effectively provides multiple wave sources spaced along a predetermined arc on the propagating medium, and the waves combine constructively at frequency-dependent points in a focal region of the medium, spaced apart from the input array. Output transducers located at these frequency-dependent points generate output signals indicative of various selected frequency components of the input signal.
摘要翻译：一种用于对含有超过1GHz（千兆赫兹）的非常高频率的信号分量的输入信号进行频谱分析的静磁波（MSW）装置。输入传感器阵列将输入信号耦合到静磁传播介质，例如钇 - 铁 - 石榴石（YIG）的膜，使得阵列有效地提供沿着传播介质上的预定电弧间隔开的多个波源，并且波形在介质的聚焦区域中的频率相关点处构造性地结合，与输入阵列间隔开。位于这些频率相关点处的输出换能器产生指示输入信号的各种选定频率分量的输出信号。

9. 发明授权

US4672641A Surface acoustic wave device for data rate reduction 失效
标题翻译：用于数据速率降低的表面声波装置
公开(公告)号：US4672641A
公开(公告)日：1987-06-09
申请号：US615609
申请日：1984-05-31
申请人： Kuo-Hsiung Yen , Robert B. Stokes , Marshall Y. Huang
发明人： Kuo-Hsiung Yen , Robert B. Stokes , Marshall Y. Huang
IPC分类号： H04L27/18 , H04B1/66 , H04J3/18 , G01L3/02
CPC分类号： H04J3/18 , H04B1/662
摘要： A surface acoustic wave (SAW) device, and corresponding method, for expanding or contracting the time scale of an input signal that varies in time but is limited to a predetermined time interval. One embodiment of the invention achieves time expansion or compression by means of two Fourier transformations providing different chirp rates, and implemented in a form that includes only five SAW dispersive delay lines. In the illustrative version of this embodiment, three of the dispersive delay lines are used in conjunction with multipliers or mixers, and two are used as convolvers. Another embodiment of the invention uses only three SAW dispersive delay lines, two in conjunction with multipliers and one located between the multipliers to effect the desired time-scale change. A third embodiment of the invention employs a SAW tapped delay line and an associated set of gates to select successive data bit signals from successive output taps in the delay line. A SAW fill-in filter is used to fill in inter-bit gaps resulting from the use of the tapped delay line.
摘要翻译：一种表面声波（SAW）装置及相应的方法，用于扩展或缩小时间上变化但被限制在预定时间间隔的输入信号的时间标度。本发明的一个实施例通过提供不同啁啾率的两个傅里叶变换实现时间扩展或压缩，并且以仅包括五个SAW色散延迟线的形式实现。在该实施例的说明性版本中，三个色散延迟线与乘法器或混频器一起使用，两个用作卷积器。本发明的另一实施例仅使用三个SAW色散延迟线，其中两个与乘法器结合，一个位于乘法器之间，以实现期望的时标变化。本发明的第三实施例采用SAW抽头延迟线和相关联的一组门，以从延迟线中的连续输出抽头选择连续的数据位信号。 SAW填充滤波器用于填充由使用抽头延迟线导致的位间间隙。

10. 发明授权

US4349794A Shallow bulk acoustic wave devices 失效
标题翻译：浅体积声波装置
公开(公告)号：US4349794A
公开(公告)日：1982-09-14
申请号：US954149
申请日：1978-10-24
申请人： Reynold S. Kagiwada , Kuo-Hsiung Yen , Ke-Li Wang , Kei F. Lau , Donald L. Lochhead , James A. Leaverton
发明人： Reynold S. Kagiwada , Kuo-Hsiung Yen , Ke-Li Wang , Kei F. Lau , Donald L. Lochhead , James A. Leaverton
IPC分类号： H03H9/02 , H03H9/15 , H03B5/32 , H03H9/36
CPC分类号： H03H9/02795 , H03H9/02236 , H03H9/02653 , H03H9/027 , H03H9/02716
摘要： Acoustic wave devices employing shallow bulk acoustic waves rather than surface acoustic waves, to provide higher frequencies of operation and other significant advantages, such as less susceptibility to aging and less sensitivity to surface contamination. In each embodiment of the invention, a transmitting transducer and a receiving transducer are oriented on the surface of an anisotropic piezoelectric crystal to achieve substantial coupling of shallow bulk acoustic waves and essentially zero coupling of surface acoustic waves. In one embodiment of the invention, various types of grating filters utilize shallow bulk acoustic waves, and a set of parallel mechanical or electrical discontinuities at or near the surface of the crystal provide reflection of acoustic energy at a frequency determined by the spacing of the discontinuities. Uniformly spaced gratings provide bandpass filter operation, and gratings with graduated spacings provide for frequency compression or expansion. In another embodiment of the invention, variations in device characteristics due to temperature changes are compensated for by directing the shallow bulk waves through materials having favorable or opposite temperature characteristics compared with those of the material into which the waves are originally launched. In other embodiments of the invention, a shallow bulk acoustic wave includes a multistrip coupler, for transferring electroacoustic energy from one propagation path to another, for use in bandpass filters, delay lines or unidirectional transducers.
摘要翻译：使用浅体积声波而不是表面声波的声波装置，以提供更高的操作频率和其他显着的优点，例如对老化的敏感性较低和对表面污染的敏感性较小。在本发明的每个实施例中，发射换能器和接收换能器定向在各向异性压电晶体的表面上，以实现浅体积声波和表面声波的基本零耦合的实质耦合。在本发明的一个实施例中，各种类型的光栅滤波器利用浅体积声波，并且在晶体表面处或附近的一组平行的机械或电气不连续性以由不连续部分的间隔确定的频率提供声能的反射。均匀间隔的光栅提供带通滤波器操作，具有刻度间距的光栅可用于频率压缩或扩展。在本发明的另一个实施例中，由于温度变化引起的器件特性的变化是通过将浅体积波导入具有有利或相反温度特性的材料来补偿的，与材料相比，波浪最初被发射的材料。在本发明的其他实施例中，浅体积声波包括用于将电声能从一个传播路径转移到另一传播路径的多带耦合器，用于带通滤波器，延迟线或单向换能器。

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