IEEE Transactions on Sonics and Ultrasonics最新文献_第2页

Optimal Center-Frequency Estimation for Back-Scattered Ultrasound Pulses 后向散射超声脉冲的最优中心频率估计

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-11-01 DOI: 10.1109/T-SU.1985.31669

R. K. Bahr, J. Bucklew, S. Flax

引用次数: 8

Spatial Uniformity and Broadband Matching in Multiply Tapped SAW Convolvers 多抽头SAW卷积的空间均匀性和宽带匹配

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-09-01 DOI: 10.1109/T-SU.1985.31652

E. Adler

{"title":"Spatial Uniformity and Broadband Matching in Multiply Tapped SAW Convolvers","authors":"E. Adler","doi":"10.1109/T-SU.1985.31652","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31652","url":null,"abstract":"Abstrnct-In surface-acoustic-wave (SAW) convolver4 used to process long-duration waveforms, the output plate electrode behaves like a lossy transmission line and the effects of electromagnetic delay and electrode resistivity must be taken into account in evaluating convnlver characteristics. These effects are characterized by a spatial uniformity or weighting function, which results in a device output that is a weighted, instead of a t rue, convolution. When a single tap is used to extract signal from a long cnnvolver, the amplitude and phase nonuniformities due to electromagnetic effects degrade the convolver performance. A common way of overcoming this spatial uniformity problem is to use many taps to extract the output signal. Although it reduces the effect of nonuniformities to acceptable levels, the multiple tapping solution can increase device insertion loss and decrease bandwidth unless special output-matching netwnrks are incorporated. These transmission line effects can be modeled by a simple equivalent circuit which makes it possible to calculate the spatial uniformity functions fnr both single and multiply tapped cnnvolver geometries. Using realistic values for parasitic elements introduced hy honding pads and wires, a multisection circuit for the multiply tapped structure is assembled and analyzed using ac circuit analysis programs. The characteristics of multiply tapped convolvers are presented with particular emphasis on spatial uniformity, system bandwidth, and insertion loss. Examples of the computer-aided design of appropriate output-matching networks which maximize handwidth and output level a r e given.","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"2021 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127094823","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: 7

Large-Scale Monolithic SAW Convolver/Correlator on Silicon 基于硅的大规模单片SAW卷积/相关器

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-09-01 DOI: 10.1109/T-SU.1985.31649

M. E. Motamedi, M. Kilcoyne, R.K. Asaourian

{"title":"Large-Scale Monolithic SAW Convolver/Correlator on Silicon","authors":"M. E. Motamedi, M. Kilcoyne, R.K. Asaourian","doi":"10.1109/T-SU.1985.31649","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31649","url":null,"abstract":"Convolver and correlator devices are key components for spread-spectrum communication systems. These devices are employed most effectively as matched filter elements to improve the signal-to-noise ratio in spread-spectrum communication systems. The basic design, fabrication, and operaling parameters of a monolithic SAW convolver/ correlator on a silicon semiconductor substrate are described. Both passive convolvers, such as metal-zinc oxide semiconductor structures, and active convolvers, such as PI-FET will be included. By use of a zinc oxide (ZnO) piezoelectric thin film material, both acoustoeleclric SAW and semiconductor electronic device components may be fabricated on the same monolithic substrate. The development of such monolithic signal processors is expected to result in very large time-bandwidth devices monolithically integrated on a single substrate compatible with low cost batch fabrication techniques. The device characterization is mainly performed by using an HP-8505 automatic network analyzer system controlled by an HP-9845 computer. Using this ystem, the transduction properties of ZnO/Si structures were evaluated. State-ofthe-art SAW monolithic technology is discussed for devices as long as 1.6 in and acoustic delays of 10 p , which are successfully fabricated on 3-in Si wafers. These large-scale devices are operating at 340 MHz and demonstrate insertion loss better than 35 dB at a feedthrough level of 90 dB, resulting in a dynamic range of better than 55 dB.","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125511893","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: 7

Convolution with Magnetostatic Waves in YIG Films YIG薄膜中静磁波的卷积

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-09-01 DOI: 10.1109/T-SU.1985.31653

J. Parekh, Hang-Sheng Tuan, K. Chang

{"title":"Convolution with Magnetostatic Waves in YIG Films","authors":"J. Parekh, Hang-Sheng Tuan, K. Chang","doi":"10.1109/T-SU.1985.31653","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31653","url":null,"abstract":"A recently reported theory is reviewed for the convolution of contra-propagating magnetostatic forward-volume waves (MSFVW) in an epitaxial yttrium iron garnet (YIG) film, which are in the form of continuous-wave signals or time-limited continuous-wave pulses. Initial experimental results on the convolution of contra-propagating MSFVW’s as well as of contra-propagating magnetostatic backward-volume waves (MSBVW) are reported. Computations of the MSFVW internal convolver hilinearity factor Fin, indicate an efficient convolution process over a wide bandwidth. The experimentally determined values of MSFVW Fint are in excellent agreement with theory. The present results will interest microwave system developers in electronic warfare and other areas, particularly if bandwidths of 1 GHz or larger can be realized in practice, even though magnetostatic-wave (MSW) delay lines, in comparison to SAW delay lines, are severely limited in terms of the maximum delay time that is realizable without excessive insertion loss, which is on the order of 0.5 CS. The reason for the interest in MSW convolvers (as, indeed, for the entire MSW technology) lies, of course, in the ability that is afforded for performing signal processing directly at microwave frequencies.","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121850529","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: 8

Zinc Oxide Films for Acoustoelectric Device Applications 声电器件用氧化锌薄膜

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-09-01 DOI: 10.1109/T-SU.1985.31645

F. Hickernell

引用次数: 135

Amplitude-Weighted Quadrature Phase Shift Keying Using SAW Technology 基于SAW技术的幅值加权正交相移键控

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-09-01 DOI: 10.1109/T-SU.1985.31663

M. Belkerdid, D. Malocha

引用次数: 7

Transient Behavior of Transverse Acoustoelectric Voltage and Nondestructive Characterization of Semiconductor Surfaces 横向声电电压的瞬态行为及半导体表面的无损表征

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-09-01 DOI: 10.1109/T-SU.1985.31662

B. Davari, P. Das

引用次数: 11

Efficient ZnO-SiO2-Si Sezawa Wave Convolver 高效ZnO-SiO2-Si Sezawa波卷积器

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-09-01 DOI: 10.1109/T-SU.1985.31650

S. Minagawa, T. Okamoto, T. Niitsuma, K. Tsubouchi, N. Mikoshiba

引用次数: 21

Memory Correlators with Multiple Input Channels 具有多输入通道的存储器相关器

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-09-01 DOI: 10.1109/T-SU.1985.31654

K. Ingebrigtsen, A. Rønnekleiv, S. Stueflotten

引用次数: 1

Announcement [EIC steps down] 公告[EIC辞职]

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-09-01 DOI: 10.1109/T-SU.1985.31643

T. Meeker

引用次数: 0