Acoustic surface wave devices
阅读：741发布：2022-03-08
专利汇可以提供Acoustic surface wave devices专利检索，专利查询，专利分析的服务。并且An acoustic surface wave device having a low capacitance transducer array comprising a pair of parallel strip terminal electrodes at each end and a plurality of electrically isolated intermediate electrodes regularly spaced between them. Each intermediate electrode is shown either as a wide strip or preferably as a pair of narrower spaced parallel strips electrically connected together. Since the piezoelectric effect is determined by the induced electrical charge, which is the same for each electrode, a form of weighting is disclosed in which the length of the electrodes varies inversely with source strength, and only that part of the acoustic surface wave beam whose width corresponds to the shortest electrode is employed.，下面是Acoustic surface wave devices专利的具体信息内容。
1. An acoustic surface wave device comprising a body of piezoelectric material, and an acoustic surface wave transducer arranged on an acoustic surface wave propagation surface of said body, said acoustic surface wave transducer comprising a pair of parallel elongate spaced apart terminal electrodes and a plurality of substantially parallel adjacent elongate conductive electrodes conductively separate one from the other and arranged in succession between said elongate terminal electrodes and substantially parallel thereto so that an electrical signal of a predetermined frequency applied to said terminal electrodes will launch a surface elastic wave to propagate over said surface and that an acoustic surface wave propagating over said surface will be detected by said electrodes to cause a corresponding electric signal to occur at said terminal electrodes.
2. An acoustic surface wave device as claimed in claim 1 in which each of the conductively separate elongate electrodes comprises a pair of spaced parallel conductive strips conductively joined together.
3. An acoustic surface wave device as claimed in claim 2 in which said acoustic surface wave transducer is a launching transducer.
4. An acoustic surface wave device as claimed in claim 2 in which the piezoelectric material has the property that the generation of acoustic surface waves by an interdigital launching electrode is determined by the electrical charge induced on the surface of said body.
5. An acoustic surface wave device as claimed in claim 3 in which the piezoelectric material comprises a ferroelectric ceramic.
6. An acoustic surface wave device as claimed in claim 3 in which a weighted distribution of effective acoustic surface wave source strength is provided along said launching transducer by arranging the lengths of said elongate electrodes in inverse relationship with the desired effective source strength, and a receiving transducer arranged on said propagation sUrface and in the path of a beam of acoustic surface waves propagated from said launching transducer so that the portion of said receiving transducer responsive to acoustic surface waves lies substantially entirely within that part of said beam which is formed by all the pairs of said elongate electrodes.
7. An ultrasonic device comprising a body of piezoelectric material, and a pair of acoustic surface wave transducers spaced apart on a surface of said body for transmitting and receiving, respectively, an acoustic surface wave propagated contiguous to said surface, at least one of said transducers comprising a pair of spaced apart parallel elongate conductive terminal electrodes and a plurality of parallel elongate conductive electrodes insulatively separated from each other and from the terminal electrodes and arranged between said terminal electrodes and parallel thereto.
8. An ultrasonic device as claimed in claim 7 wherein said plurality of elongate electrodes each comprise a pair of spaced parallel conductive members joined together at one end by a conductive member.
9. An ultrasonic device as claimed in claim 8 wherein said one transducer is adapted to receive an alternating electric signal of a given frequency at said terminal electrodes thereby to launch within said body an acoustic surface wave to propagate along said surface.
10. An ultrasonic device as claimed in claim 8 wherein said one transducer is adapted to detect an acoustic surface wave propagating in said body along said surface to derive an alternating electric signal at said terminal electrodes corresponding to an electric signal applied to the transmitting transducer.
11. An ultrasonic device as claimed in claim 9 wherein said plurality of elongate electrodes vary progressively in length between said terminal electrodes.
12. An ultrasonic deivce as claimed in claim 9 wherein said plurality of elongate electrodes vary progressively in length from the mid-point between said terminal electrodes to each of the terminal electrodes.
13. An ultrasonic device as claimed in claim 10 wherein said plurality of elongate electrodes vary progressively in length between said terminal electrodes.
| 标题 | 发布/更新时间 | 阅读量 |
|---|---|---|
| 基于声纹特征识别的聚乙烯气相流化床生产过程结块在线监测系统及方法 | 2020-05-11 | 512 |
| 可用于非满管排水管道的流量测量装置 | 2020-05-12 | 177 |
| 一种综合模式的压电发电单元及道路全断面同步发电装置 | 2020-05-11 | 480 |
| 一种压电驱动压电检测的解耦式微陀螺装置 | 2020-05-11 | 37 |
| 一种测氢气的磁电谐振传感器、测试装置及测试方法 | 2020-05-12 | 584 |
| 基于H形共振管提升光声光谱传感器性能的装置和方法 | 2020-05-11 | 102 |
| 一种多机理复合式宽频带振动俘能器 | 2020-05-12 | 101 |
| 一种压电催化多孔陶瓷材料、其制备方法与应用 | 2020-05-08 | 972 |
| 一种新型单晶体光弹调制器 | 2020-05-11 | 206 |
| 掺杂HfO2铁电栅的InAlNGaN HEMT器件 | 2020-05-11 | 481 |
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