Surface-wave electro-acoustic filter专利检索-电声换能器传感器变压器和转换设备专利检索查询-专利查询网

Surface-wave electro-acoustic filter

阅读：890发布：2022-05-14

专利汇可以提供Surface-wave electro-acoustic filter专利检索，专利查询，专利分析的服务。并且An electro-acoustic surface-wave (Rayleigh waves) device comprises a piezoelectric plate equipped with two transducers one at least of which is constituted by two comb-shaped electrodes having interleaved teeth. At least one of the electrodes have teeth of a dissimilar length the envelope of which is the curve representing the Fourier transform of the transfer function of the device when operated as a filter. The device finds application in the fields of radar, telecommunications, data processing, and the like.，下面是Surface-wave electro-acoustic filter专利的具体信息内容。

权利要求

1. A surface-wave electro-acoustic filter comprising a plate (3) of piezoelectric material; two transducers (1, 2) applied to said plate, at least one of which comprises two metal electrodes (1A, 1B) in comb-shaped form having interleaved teeth, at least one of the comb-shaped electrodes (1B) having teeth of dissimilar length, the envelope described by the tips of the teeth of said electrode being essentially the curve defining the Fourier transform of the transfer function of the device when operating as a fIlter; and the number of teeth in the electrode with dissimilar length teeth being sufficiently large for the envelope or envelopes to define the major undulations and lobes in said transform.

2. A filter as claimed in claim 1, acting as a bandpass filter, wherein the envelope of the teeth of the combination of the envelopes of the teeth, is approximately the curve following the law described by the function y sin x/x ; x and y being coordinates respectively associated with the spacing and the lengths of said teeths.

3. A device as claimed in claim 1 wherein the piezoelectric plate (3) is made of quartz.

4. A device as claimed in claim 3, wherein the quartz plate (3) is X-cut and the electrodes are applied to the plate to obtain a direction of propagation of acoustic waves making an angle of about 30* with the Y axis; X and Y being crystallographic axes of said quartz plate.

5. A device as claimed in claim 1 wherein the piezoelectric plate (3) is made of cadmium sulphide.

6. A device as claimed in claim 1, wherein the pitch of said interleaved teeth is smaller than 10 microns.

7. A device as claimed in claim 1 wherein two adjacent teeth are connected to one and the same electrode at points (4) which correspond to a change in sign in the Fourier transform.

8. A device as claimed in claim 1 wherein more than one of the comb-shaped electrodes has teeth of dissimilar lengths, the combination of the envelopes of the tips of the teeth forming said curve defining the Fourier transform.

9. A device as claimed in claim 1 wherein the teeth of the comb-shaped electrodes are equidistant from each other.

10. A device as claimed in claim 7 wherein the teeth applied to the plate are equidistant from each other.

11. A device as claimed in claim 1, wherein the piezoelectric plate (3) is made of piezoelectric ceramic.

12. A device as claimed in claim 1, wherein the piezoelectric plate (3) is made of lithium methaniobate.

说明书全文

相关专利内容

标题	发布/更新时间	阅读量
一种基于声光偏转器的非机械式激光三维扫描系统	2020-05-08	988
具有集成结构特征部的电声换能器隔膜及相关系统和方法	2020-05-12	826
一种基于多核处理器的在线水声通信算法测试装置	2020-05-08	508
一种可提高电声转换效率的超声外科手术系统	2020-05-13	481
音效补偿方法和装置、可读存储介质、终端	2020-05-13	888
一种标准超声功率源	2020-05-13	527
一种用于带管腔的压力测量系统的校准装置	2020-05-12	160
用于音频头戴设备的多模自适应消噪的系统及方法	2020-05-12	808
便携式扬声器	2020-05-12	533
用于超声波及电声系统的骨传导扬声器	2020-05-08	789

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。

申请试用

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。

申请试用

电声换能器热门专利

热门分类

Surface-wave electro-acoustic filter

该功能需要专业版企业版VIP权限，您可以：