公开(公告)号：US4265124A

公开(公告)日：1981-05-05

申请号：US45506

申请日：1979-06-04

申请人： Teong C. Lim ,  Edward J. Staples

发明人： Teong C. Lim ,  Edward J. Staples

IPC分类号： G01L9/08 ,  G01D5/48 ,  G01L9/00 ,  G01N29/24 ,  H03H3/08 ,  H03H9/25

CPC分类号： G01L9/0025 ,  G01D5/48

摘要： Disclosed is an acoustic wave sensor, including an acoustic wave oscillator having a resonant frequency which is modulated according to changes in a physical variable and a broadcast amplifier for directly transmitting the modulated frequency as a radio frequency signal. As a surface acoustic wave pressure sensor, the sensor includes a housing defining a cavity therein, an opening in the housing communicating with the cavity, a surface acoustic wave transducer attached to the housing to close the opening and adapted to deflect in response to a pressure differential across the transducer, an amplifier coupled to the transducer in a feedback loop, the transducer thereby being adapted to modulate the resonant frequency of the loop in response to the deflection, and a broadcast amplifier for directly transmitting the modulated frequency as a radio frequency signal. As a Stoneley acoustic wave pressure sensor, the sensor includes a housing defining a cavity therein, an opening in the housing communicating with the cavity, a Stoneley acoustic wave transducer attached to the housing to close the opening and adapted to deflect in response to a dynamic pressure differential across the transducer, an orifice in the housing communicating with the cavity to equalize any static pressure differential, an amplifier coupled to the transducer in a feedback loop, the transducer thereby being adapted to modulate the resonance frequency of the loop in response to the deflection, and a broadcast amplifier for directly transmitting the modulated frequency as a radio frequency signal.

摘要翻译： 公开了一种声波传感器，包括具有根据物理变量的变化调制的谐振频率的声波振荡器和用于直接发送调制频率作为射频信号的广播放大器。 作为表面声波压力传感器，传感器包括在其中限定腔室的壳体，与壳体连通的壳体中的开口，附接到壳体的表面声波换能器以闭合开口并适于响应于压力而偏转 换能器之间的差分，放大器，耦合到反馈回路中的换能器，换能器因此适于响应于偏转来调制回路的谐振频率，以及广播放大器，用于直接传输调制频率作为射频信号 。 作为斯通利声波压力传感器，传感器包括在其中限定空腔的壳体，壳体中的与空腔连通的开口，连接到壳体的斯通利声波传感器，以闭合开口并适于响应于动态 跨越换能器的压力差，壳体中的孔与空腔连通以均衡任何静态压力差，在反馈回路中耦合到换能器的放大器，因此该换能器适于响应于调节环路的谐振频率 偏转，以及广播放大器，用于直接发送调制频率作为射频信号。

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：US4323901A

公开(公告)日：1982-04-06

申请号：US122331

申请日：1980-02-19

申请人： Roger E. De Wames ,  William F. Hall ,  William W. Ho ,  Teong C. Lim

发明人： Roger E. De Wames ,  William F. Hall ,  William W. Ho ,  Teong C. Lim

IPC分类号： H01Q3/46 ,  H01Q19/06

CPC分类号： H01Q3/46 ,  H01Q19/06

摘要： Disclosed is a phased array for steering an electromagnetic wave, which includes a first layer of active material, including parallel first inner and outer surfaces, and a second layer of active material, including parallel second inner and outer surfaces which are also parallel to the first inner and outer surfaces, the second layer being adjacent to the first layer. An electrically conductive ground plane of indium tin oxide is disposed between the first and second layers and in electrical contact with the first and second inner surfaces. A first series of spaced parallel electrodes, each of the electrodes being in the form of a thin strip of indium tin oxide, is deposited on the first outer surface, while a second series of spaced parallel electrodes, each of these electrodes also being in the form of a thin strip of indium tin oxide, is similarly deposited on the second outer surface but is orthogonal to the first series of electrodes. A first anti-reflective coating may be deposited on the first outer surface, with a second antireflective coating deposited on the second outer surface.

摘要翻译： 公开了一种用于转向电磁波的相控阵列，其包括第一层活性材料，包括平行的第一内表面和外表面，以及第二层活性材料，包括平行的第二内表面和外表面，其平行于第一 内表面和外表面，第二层与第一层相邻。 铟锡氧化物的导电接地平面设置在第一和第二层之间并与第一和第二内表面电接触。 第一系列间隔开的平行电极，每个电极呈铟锡氧化物的薄带形式，沉积在第一外表面上，而第二系列间隔开的平行电极，这些电极中的每一个也位于 铟锡氧化物薄带的形式类似地沉积在第二外表面上，但与第一系列电极正交。 第一抗反射涂层可沉积在第一外表面上，第二抗反射涂层沉积在第二外表面上。