Acoustic surface wave transmission device
阅读：138发布：2021-11-30
专利汇可以提供Acoustic surface wave transmission device专利检索，专利查询，专利分析的服务。并且A surface wave integratable filter includes input and output transducers spaced apart on an acoustic wave propagating medium. The input transducer launches acoustic surface waves along a path in which the wavefronts diverge. Disposed on the medium between the input and output transducers is an acoustic lens formed of a material that exhibits an acoustical refractive index greater than one. The lens acts to change the width of the acoustic wavefront and thereby enables appropriate selection of the physical size of the output transducer so as to obtain desired input and output impedances while securing increased efficiency of interaction at the output transducer.，下面是Acoustic surface wave transmission device专利的具体信息内容。
1. A signal transmission device comprising: a medium propagative of acoustic surface waves; means including an input transducer responsive to input signals for launching acoustic surface waves along a predetermined path on said medium, the fronts of said waves having a width which changes during propagation; an acoustic lens, including a material on said medium exhibiting an acoustical refractive index greater than one, disposed in said path for modifying the width change of said fronts; and means including an output transducer responsive to said acoustic surface waves transmitted through said lens for developing an output signal.
2. A device as defined in claim 1 in which said material decreases the velocity of propagation of said waves so that said lens is convergent.
3. A device as defined in claim 1 in which said lens converges said acoustic waves to a focal point further along said path than said output transducer, and including an element attenuative of said surfaces waves disposed on said medium in the vicinity of said focal point.
4. A device as defined in claim 1 in which said output transducer includes a series of interleaved electrodes disposed across the path of said waves, and in which the distance of said output transducer along said path beyond said lens as well as the length of said electrodes are selected to obtain a predetermined impedance for said output transducer while optimizing the interaction of said output transducer with said surface waves.
5. A device as defined in claim 1 in which at least one of said input and output transducers is coupled to a plane of reference potential, and in which said acoustic lens also is coupled to said plane of reference potential.
6. A device as defined in claim 1 in which said lens is convergent and in which said output transducer has a width across the path less than that of said input transducer.
7. A device as defined in claim 1 in which said lens is divergent and in which said output transducer has a width across the path of said waves greater than that of said input transducer.
8. A device as defined in claim 4 which includes a second output transducer similar to the first output transducer but spaced on said medium on the other side of said input transducer than said first output transducer, which further includes a second acoustic lens disposed in the propagation path between said input transducer and said second output transducer, and in which the electrodes of said second output transducer have a different length from those of said first output transducer so that said second output transducer presents an impedance substantially different from that of said first output transducer.
9. A device as defined in claim 8 in which said second acoustic lens exhibits a refractive power substantially different from that of the first acoustic lens.
10. A device as defined in claim 1 in which said acoustic lens curves the fronts of said acoustic waves and in which interactive portions of said output transducer are correspondingly curved.
11. A signal transmission device comprising: a medium capable of propagating acoustic surface waves; means including an electro-acoustic input transducer responsive to electrical input signals for launching acoustic surface waves along a predetermined path on a surface of said medium; acoustic surface wave lens means for focusing acoustic surface waves on said medium, comprising a substantially two-dimensional lens pattern disposed on said surface in said path to intercept surface waves propagated therealong and being composed of a material which conducts surface waves at a velocity different from the velocity of propagation of surface waves on said medium; and means including an electro-acoustic output transducer on said surface of said medium responsive to said acoustic surface waves transmitted through said lens pattern for developing electrical output signals.
| 标题 | 发布/更新时间 | 阅读量 |
|---|---|---|
| 异质薄膜结构的制备方法 | 2020-05-11 | 863 |
| 时分、时分与频分、时分与码分、时分与码分与频分结合的声表面波标签测温系统及方法 | 2020-05-11 | 515 |
| 基于极窄带滤波与背越效应的单微波量子放大器 | 2020-05-11 | 667 |
| 一种基于钯镍合金薄膜的声表面波氢气传感器 | 2020-05-13 | 990 |
| 滤波器装置、多工器、高频前端电路以及通信装置 | 2020-05-08 | 479 |
| 一种扁平式三相永磁无刷直流电机机芯 | 2020-05-12 | 628 |
| 电磁超声SV波与表面波检测系统 | 2020-05-08 | 495 |
| 提取器 | 2020-05-11 | 566 |
| 一种高增益高抑制北斗一代有源天线模块 | 2020-05-13 | 109 |
| 一种用于全球导航卫星系统的多模射频低噪声放大器模块 | 2020-05-12 | 632 |
高效检索全球专利专利汇是专利免费检索,专利查询,专利分析-国家发明专利查询检索分析平台，是提供专利分析，专利查询，专利检索等数据服务功能的知识产权数据服务商。
我们的产品包含105个国家的1.26亿组数据，免费查、免费专利分析。
分析报告
专利汇分析报告产品可以对行业情报数据进行梳理分析，涉及维度包括行业专利基本状况分析、地域分析、技术分析、发明人分析、申请人分析、专利权人分析、失效分析、核心专利分析、法律分析、研发重点分析、企业专利处境分析、技术处境分析、专利寿命分析、企业定位分析、引证分析等超过60个分析角度，系统通过AI智能系统对图表进行解读，只需1分钟，一键生成行业专利分析报告。
QQ群二维码
意见反馈
意见反馈