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公开(公告)号：US07889025B1
公开(公告)日：2011-02-15
申请号：US12214292
申请日：2008-06-10
CPC分类号： H03H9/02842 , H03H9/0211
摘要： An anti-reflective acoustic diffusion device is provided by a group of irregularly dimensioned diffusing elements positioned on an acoustic wave substrate end that diffuse the SAW and eliminate unwanted acoustic reflections from the end of the substrate. The irregularly dimensioned diffusing elements are substantially irregular in size, shape, composition, and location and provide the desired diffusion into a nearly uniform distributed acoustic energy with a random phase. The anti-reflective acoustic diffusion device can be used with SAW, BAW or multiple acoustic wave configurations. This invention also encompasses an anti-reflective acoustic diffusion system and methods for diffusing acoustic reflections with anti-reflective acoustic diffusing elements.
摘要翻译： 防反射声扩散装置由位于声波衬底端的不规则尺寸的扩散元件组提供，其扩散了SAW并从衬底的端部消除了不需要的声反射。 不规则尺寸的漫射元件在尺寸，形状，组成和位置上基本上是不规则的，并且将随机相的期望扩散提供到几乎均匀的分布的声能。 抗反射声扩散装置可以与SAW，BAW或多声波配置一起使用。 本发明还包括抗反射声扩散系统和用抗反射声扩散元件扩散声反射的方法。
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公开(公告)号：US07132908B1
公开(公告)日：2006-11-07
申请号：US10943832
申请日：2004-09-16
CPC分类号： H03H9/25
摘要： RF programmable SAW filters achieve selectable filter performance by providing tunable input and output interdigital (IDTs) with different synchronous frequencies and substantially reduce electromagnetic interference (EMI) associated with RF signals not of interest. The RF programmable SAW filter includes tunable input and output IDT's, with the input and output IDT's having different input and output IDT synchronous frequencies. The input signal is divided into multiple output signals along multiple signal paths that are applied to an input tap weight network wherein the amplitude of each output signal may be varied individually. The individually weighted signal paths are then applied one each to individual IDT input electrode fingers in a means for IDT input, which is characterized by a synchronous frequency Fin. The IDT input means generates an acoustic wave that propagates to a means for IDT output, which is characterized by a synchronous frequency Fout, where Fin and Fout are not the same. The electrical signals generated in the IDT output means are processed through an output tap weight network, and the output signal is formed as a weighted sum to provide a selectable center frequency, a selectable bandwidth, a minimum insertion loss, a maximum sidelobe rejection level and a selectable filter transfer function, or phase/magnitude profile.RF programmable SAW filters, RF partially programmable SAW filters, RF fully programmable SAW filters and a method for making programmable RF SAW filters are provided.
摘要翻译： RF可编程SAW滤波器通过提供具有不同同步频率的可调谐输入和输出叉指（IDT）来实现可选择的滤波器性能，并显着降低与不感兴趣的RF信号相关的电磁干扰（EMI）。 RF可编程SAW滤波器包括可调输入和输出IDT，输入和输出IDT具有不同的输入和输出IDT同步频率。 输入信号沿着多个信号路径被分成多个输出信号，这些信号路径被施加到输入抽头加权网络，其中每个输出信号的振幅可以单独变化。 然后将单独加权的信号路径一个一个地应用于IDT输入装置中的各个IDT输入电极指，其特征在于中的同步频率F SUB。 IDT输入装置产生传播到用于IDT输出的装置的声波，其特征在于同步频率F OUT OUT，其中F SUB和/或OUT 不一样。 在IDT输出装置中产生的电信号通过输出抽头加权网络进行处理，并且输出信号形成为加权和，以提供可选择的中心频率，可选带宽，最小插入损耗，最大旁瓣抑制电平和 可选择的滤波器传递函数或相位/幅度分布。 提供RF可编程SAW滤波器，RF部分可编程SAW滤波器，RF完全可编程SAW滤波器和制造可编程RF SAW滤波器的方法。
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公开(公告)号：US07122783B1
公开(公告)日：2006-10-17
申请号：US10985077
申请日：2004-11-02
申请人： Robert A. Pastore, Jr. , John A. Kosinski , Hong-Liang Cui , Yan Zhang , Zhifan Yin , Bingquan Chen
发明人： Robert A. Pastore, Jr. , John A. Kosinski , Hong-Liang Cui , Yan Zhang , Zhifan Yin , Bingquan Chen
CPC分类号： G01V1/00
摘要： Fiber Bragg gratings (FBG) seismic activity sensors coupled in sensor arrays provide increased sensitivity to seismic activities, lower strain values and an absence of EMI allowing detection of troop and vehicle movements based on ground vibrations generating seismic signals. The FBG sensor head features a spring-mass configuration with a head surface, fiber optic cable and the FBG sensor attached to a spring that stretches during the acceleration of the mass. Waves propagating inside the earth and along the ground arriving at the sensor locations cause movement of the seismic activity sensors embedded in the ground and this movement induces an acceleration-dependent change in the FBG gratings placed on the sensors. In multiple sensor configurations, the cable will be connected to the other sensors in the network. FBG sensors, sensor arrays and sensor methods are provided in several embodiments.
摘要翻译： 耦合在传感器阵列中的光纤布拉格光栅（FBG）地震活动传感器为地震活动提供了更高的灵敏度，更低的应变值和不存在EMI，从而可以基于产生地震信号的地面振动检测部队和车辆的运动。 FBG传感器头具有弹簧质量配置，带有头表面，光纤电缆，FBG传感器连接到在质量加速过程中延伸的弹簧。 传播到地球和沿着地面到达传感器位置的波浪使嵌入地面的地震活动传感器的运动发生变化，导致放置在传感器上的FBG光栅的加速度相关变化。 在多个传感器配置中，电缆将连接到网络中的其他传感器。 在几个实施例中提供FBG传感器，传感器阵列和传感器方法。
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公开(公告)号：US06459345B1
公开(公告)日：2002-10-01
申请号：US09928701
申请日：2001-08-08
IPC分类号： H03H964
CPC分类号： H03H9/6403
摘要： A programmable SAW transversal filter utilizing a finger array and phase shifters to implement unidirectional transducers for providing low insertion loss and reduced or suppressed triple transient echo. A piezoelectric substrate has an input unidirectional transducer and an output unidirectional transducer formed thereon. A surface acoustic wave is transmitted between the input unidirectional transducer and the output unidirectional transducer. Programmable gain devices and phase shifters are coupled to the respective input unidirectional transducer fingers and the output unidirectional transducer fingers forming multi-phase unidirectional transducers. The present invention may be utilized as a transversal filter in many communication devices, and in particular a multi format personal communication system.
摘要翻译： 使用手指阵列和移相器的可编程SAW横向滤波器来实现单向换能器，用于提供低插入损耗和减少或抑制的三重瞬态回波。 压电基板具有输入单向换能器和形成在其上的输出单向换能器。 在输入单向换能器和输出单向换能器之间传播表面声波。 可编程增益器件和移相器耦合到相应的输入单向换能器指状物和输出单向换能器指状物，形成多相单向换能器。 本发明可以用作许多通信设备中的横向滤波器，特别是多格式的个人通信系统。
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公开(公告)号：US06492884B1
公开(公告)日：2002-12-10
申请号：US09613048
申请日：2000-06-29
IPC分类号： H03H1500
CPC分类号： H03H9/6403
摘要： The operational flexibility of programmable transversal filters is enhanced by incorporating switch arrays to permit passage for a plurality of tap voltages or signals to particular amplifiers in amplifier arrays. Fixed gain amplifiers may be incorporated to overcome the need to calibrate variable gain amplifiers and to reduced the number of amplifiers required.
摘要翻译： 可编程横向滤波器的操作灵活性通过结合开关阵列来允许通过多个抽头电压或信号到放大器阵列中的特定放大器来增强。 可以结合固定增益放大器来克服校准可变增益放大器的需要，并减少所需的放大器的数量。
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6.发明授权
公开(公告)号：US5278854A
公开(公告)日：1994-01-11
申请号：US946720
申请日：1992-09-18
CPC分类号： H03F3/08
摘要： Bulk gallium arsenide having a high hold-off voltage is optically activated by a laser resulting in high power output. A high voltage input is applied to a semi-insulating gallium arsenide material. The gallium arsenide material is activated by laser light, thereby resulting in large current conduction. An external oscillating signal is superimposed on the high current resulting in a high power output.
摘要翻译： 具有高保持电压的大量砷化镓由激光器光学激活，导致高功率输出。 高电压输入施加到半绝缘砷化镓材料上。 砷化镓材料被激光激发，从而导致大的电流传导。 外部振荡信号叠加在高电流上，导致高功率输出。
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