1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027)最新文献_第9页

Microwave HBAR spectroscopy and transducer application of carbon nanotube films 碳纳米管薄膜的微波HBAR光谱及换能器应用

1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027) Pub Date : 1999-10-17 DOI: 10.1109/ULTSYM.1999.849461

G. Mansfeld, S. Alekseev, Y. Gulyaev, Z. Kosakovskaya

引用次数: 1

Material, geometry, and frequency independent bivariate universal functions for the analysis of mechanical and electrical loading effects in acoustic devices: A Fast-MoM approach 材料、几何和频率无关的二元通用函数用于声学设备中机械和电气负载效应的分析:一种快速mom方法

1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027) Pub Date : 1999-10-17 DOI: 10.1109/ULTSYM.1999.849362

A. Baghai-Wadji

{"title":"Material, geometry, and frequency independent bivariate universal functions for the analysis of mechanical and electrical loading effects in acoustic devices: A Fast-MoM approach","authors":"A. Baghai-Wadji","doi":"10.1109/ULTSYM.1999.849362","DOIUrl":"https://doi.org/10.1109/ULTSYM.1999.849362","url":null,"abstract":"In this paper we consider the massloading problem in surface acoustic wave devices under fairly general conditions. We assume a finite number of non-equidistantly spaced electrodes with arbitrary cross-section geometries and material constitutions. Electrical loading effect is also addressed and a model is presented which is a generalization of this author's model published in 1989. To solve our problem we have considerably improved the capabilities of the Fast-MoM analysis technique. It turns out that it is possible to generate bivariate universal functions which are frequency, material, and geometry independent. The purpose of this paper is to provide an idea about how the universal functions are created. Having the universal functions we simply have to follow the following recipe to solve a practical problem: (1) discretize the boundaries of electrodes; (2) find the positions of a number of sampling points; (3) sample the universal functions; (4) construct a square matrix; (5) solve a system of equations. If the frequency, or the material, or the geometry of an electrode alters only the locations of the sampling points change. In this paper we present examples for the universal functions and discuss one application of the Fast-MoM.","PeriodicalId":339424,"journal":{"name":"1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124890507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Performance of 50 MHz transducers incorporating fiber composite, PVDF, PbTiO/sub 3/ and LiNbO/sub 3/ 采用光纤复合材料、PVDF、PbTiO/sub 3/和LiNbO/sub 3/的50 MHz换能器的性能

1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027) Pub Date : 1999-10-17 DOI: 10.1109/ULTSYM.1999.849209

J. Zhao, Carlos H. F. Alves, K. Snook, J. Cannata, W.H. Chen, R. Meyer, S. Ayyappan, T. Ritter, K. Shung

{"title":"Performance of 50 MHz transducers incorporating fiber composite, PVDF, PbTiO/sub 3/ and LiNbO/sub 3/","authors":"J. Zhao, Carlos H. F. Alves, K. Snook, J. Cannata, W.H. Chen, R. Meyer, S. Ayyappan, T. Ritter, K. Shung","doi":"10.1109/ULTSYM.1999.849209","DOIUrl":"https://doi.org/10.1109/ULTSYM.1999.849209","url":null,"abstract":"The performance of high frequency single element transducers depends greatly upon the mechanical and electrical properties of the piezoelectric materials used. This study compares the design and performance of transducers incorporating different materials. The materials selected include 1-3 PZT fiber composite, PbTiO/sub 3/ ceramic, PVDF film and LiNbO/sub 3/ single crystal. Transducers were tested for insertion loss and -6 dB bandwidth using the pulse/echo response from a flat quartz target. All transducers were constructed with a 3 mm aperture size and f number between 2 to 3. Backing and matching materials were varied to optimize each design. An additional design consideration is electrical impedance matching to 50 ohm especially for the fiber composite and PbTiO/sub 3/ transducers due to their relatively high dielectric constant. Sensitivity between transducers displayed a significant variation, with insertion losses from -21.3 dB to -46 dB. -6 dB bandwidths were in the range of 47 to 118%. In-vitro UBM images of the human eye were made to compare the different transducers.","PeriodicalId":339424,"journal":{"name":"1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122076863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Very highly efficient surface acoustic wave convolver using GaSb/InSb/AlGaAsSb heterostructures grown on LiNbO/sub 3/ substrates 利用生长在LiNbO/ sub3 /衬底上的GaSb/InSb/AlGaAsSb异质结构的非常高效的表面声波卷积器

1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027) Pub Date : 1999-10-17 DOI: 10.1109/ULTSYM.1999.849402

N. Kuze, H. Goto, Y. Kanno, M. Tsunashima, Y. Yamagata, K. Yamanouchi

引用次数: 2

High-field properties of PMN-PT single crystals PMN-PT单晶的高场性能

1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027) Pub Date : 1999-10-17 DOI: 10.1109/ULTSYM.1999.849167

Wei Luo, A. Ding, Haosu Luo, Z. Yin

引用次数: 6

Investigation of longitudinal leaky surface acoustic waves by scanning acoustic force microscopy 扫描声力显微镜研究纵向泄漏表面声波

1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027) Pub Date : 1999-10-17 DOI: 10.1109/ULTSYM.1999.849379

G. Behme, E. Chilla, H.-J. Frohlich

引用次数: 1

A nonlinear amplitude modulation phenomenon 一种非线性调幅现象

1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027) Pub Date : 1999-10-17 DOI: 10.1109/ULTSYM.1999.849467

Jian-jun Chen, Y. Mao, Yan Zhang, Wen‐hua Jiang, D. Zhang

引用次数: 0

Digital beamforming using non-uniform oversampling delta-sigma conversion 使用非均匀过采样δ - σ转换的数字波束形成

1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027) Pub Date : 1999-10-17 DOI: 10.1109/ULTSYM.1999.849230

M. Karaman, M. Kozak

引用次数: 10

Study of propagation properties of quasi-longitudinal leaky surface acoustic wave propagating on Y-rotated cut quartz substrates 准纵向泄漏表面声波在y旋转切割石英基底上的传播特性研究

1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027) Pub Date : 1999-10-17 DOI: 10.1109/ULTSYM.1999.849411

D. Zhang, X. Tong, H. Qin

引用次数: 2

Ultrasound acoustic stimulated emission for controlling thermal surgery 超声声刺激发射控制热手术

1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027) Pub Date : 1999-10-17 DOI: 10.1109/ULTSYM.1999.849257

T. Karjalainen, J.S. Thierman, K. Hynynen

引用次数: 11