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1. 发明授权

US4181904A Acoustic-wave convolvers utilizing diffused waveguides and beam compression techniques 失效
标题翻译：利用扩散波导和光束压缩技术的声波卷积器
公开(公告)号：US4181904A
公开(公告)日：1980-01-01
申请号：US932248
申请日：1978-08-09
申请人： Joseph F. Weller , James D. Crowley , Thomas G. Giallorenzi
发明人： Joseph F. Weller , James D. Crowley , Thomas G. Giallorenzi
IPC分类号： G06G7/195 , H03H9/26 , H01L41/08 , H03H9/30 , H03K5/159
CPC分类号： G06G7/195
摘要： Two input transducers launch oppositely-propagating acoustic surface waves on a piezoelectric substrate. The waves are compressed to a smaller beamwidth and then laterally confined in a diffused channel waveguide where non-linear interaction occurs at increased energy densities due to the beam compression. In one embodiment the beam compression is accomplished in multistrip couplers. In another embodiment, diffused horn-shaped channels are provided for compressing the beamwidth. Both piezoelectric and semiconductor convolvers are disclosed.
摘要翻译：两个输入传感器在压电基板上发射相反传播的声表面波。波被压缩到较小的波束宽度，然后横向限制在扩散通道波导中，由于波束压缩，在增加的能量密度下发生非线性相互作用。在一个实施例中，束压缩是在多段耦合器中完成的。在另一个实施例中，提供扩散的喇叭形通道用于压缩波束宽度。公开了压电和半导体卷取器。

2. 发明授权

US4088969A Tapped surface acoustic wave delay line 失效
标题翻译：敲击表面声波延迟线
公开(公告)号：US4088969A
公开(公告)日：1978-05-09
申请号：US788874
申请日：1977-04-19
申请人： James D. Crowley , Joseph F. Weller , Thomas G. Giallorenzi
发明人： James D. Crowley , Joseph F. Weller , Thomas G. Giallorenzi
IPC分类号： G10K11/36 , H03F13/00 , H03H9/42 , H03H9/30 , H01L45/02 , H03F3/04 , H03F3/55
CPC分类号： H03F13/00 , G10K11/36 , H03H9/423
摘要： A tapped surface acoustic wave (SAW) delay line with time-resolved outputssing piezoelectric leaky wave coupling and bulk wave amplification, and having low loss characteristics. A solid piezoelectric semiconductor is placed adjacent to a solid piezoelectric substrate. A pulsed rf input signal is applied to interdigital transducers (IDT) on the substrate. The applied signal launches a SAW in the substrate in a direction parallel to the interface between the substrate and the piezoelectric semiconductor solid. Upon reaching the interface, the SAW is piezoelectrically leaky-wave coupled across an air gap to a bulk acoustic wave in the piezoelectric semiconductor. Reflections of the bulk wave occur at both surfaces of the piezoelectric semiconductor, and piezoelectrically couples back across the air gap to excite a SAW on the piezoelectric substrate. The resultant rf output includes the normal delayed SAW pulse and additional delayed and time-resolved pulses. The amplitude of the bulk wave may be increased using bulk wave amplification.
摘要翻译：具有时间分辨输出的抽头声表面波（SAW）延迟线，采用压电泄漏波耦合和体波放大，具有低损耗特性。将固体压电半导体放置成与固体压电基板相邻。脉冲rf输入信号被施加到基板上的指数间换能器（IDT）。所施加的信号在平行于衬底和压电半导体固体之间的界面的方向上在衬底中发射SAW。在到达界面时，SAW在压电半导体中横跨气隙压电泄漏波耦合到体声波。体波的反射发生在压电半导体的两个表面，并且压电耦合回穿过气隙，以激发压电衬底上的SAW。所得到的rf输出包括正常延迟的SAW脉冲和附加的延迟和时间分辨脉冲。可以使用体波放大来增加体波的幅度。

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