Proceedings of the 2000 IEEE/EIA International Frequency Control Symposium and Exhibition (Cat. No.00CH37052)最新文献_第6页

New researches on low noise signal generation based upon electronic devices with strong surface sensitivity 基于高表面灵敏度电子器件的低噪声信号产生新研究

Proceedings of the 2000 IEEE/EIA International Frequency Control Symposium and Exhibition (Cat. No.00CH37052) Pub Date : 2000-06-07 DOI: 10.1109/FREQ.2000.887374

Dai Enguang

引用次数: 1

Optimization of inner structure of fan-shaped SAW transducers 扇形SAW换能器内部结构优化

Proceedings of the 2000 IEEE/EIA International Frequency Control Symposium and Exhibition (Cat. No.00CH37052) Pub Date : 2000-06-07 DOI: 10.1109/FREQ.2000.887372

E.V. Bausk

引用次数: 3

Design, manufacturing, and characterization of high-frequency thickness-shear mode resonators 高频厚度-剪切模谐振器的设计、制造和表征

Proceedings of the 2000 IEEE/EIA International Frequency Control Symposium and Exhibition (Cat. No.00CH37052) Pub Date : 2000-06-07 DOI: 10.1109/FREQ.2000.887338

J. Rabe, S. Buttgenbach, B. Zimmermann, P. Hauptmann

{"title":"Design, manufacturing, and characterization of high-frequency thickness-shear mode resonators","authors":"J. Rabe, S. Buttgenbach, B. Zimmermann, P. Hauptmann","doi":"10.1109/FREQ.2000.887338","DOIUrl":"https://doi.org/10.1109/FREQ.2000.887338","url":null,"abstract":"AT-cut quartz crystals vibrating in the thickness-shear mode are well known as mass sensitive devices. After deposition of a sensitive layer on one or both surfaces of the quartz discs these resonators are suitable for the application as chemical sensors for analysis in gaseous and liquid media, which are known as quartz crystal microbalances (QCM). Up to now the resonant frequencies of these resonators are 5 to 30 MHz. The application of combined photolithographic and etching processes offers new promising approaches for the manufacturing of quartz resonators with higher resonant frequencies, up to 75 MHz, and smaller diameters. Resonators were fabricated and subsequently characterized optically and mechanically by means of light microscopy, SEM, and surface profiling and electrically by means of impedance analysis. The etched surfaces are very smooth and parallel, leading to high Q-factors up to 5/spl middot/10/sup 4/, which is excellent for high frequency resonators. A high mechanical stability due to the 128 /spl mu/m thick quartz frame was proofed. The influences of surface roughness and etch channels on the resonators' performance were examined. The behaviour under acoustic load was investigated experimentally. The results showed that 50 MHz resonators operated in water reach zero phase of impedance. In liquid media, changes in the viscosity (/spl eta//sub L/) and density (/spl rho//sub L/) lead to a decrease of the resonant frequency (/spl Delta/f) of the QCM. A linear relationship between (/spl eta//sub L//spl rho//sub L/)/sup 1/2/ and /spl Delta/f was observed, in agreement with theory, while the frequency shifts are much higher than reported before.","PeriodicalId":294110,"journal":{"name":"Proceedings of the 2000 IEEE/EIA International Frequency Control Symposium and Exhibition (Cat. No.00CH37052)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115476677","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: 30

Cryo-cooled sapphire oscillator operating above 35 K 低温冷却蓝宝石振荡器工作在35 K以上

Proceedings of the 2000 IEEE/EIA International Frequency Control Symposium and Exhibition (Cat. No.00CH37052) Pub Date : 2000-06-07 DOI: 10.1109/FREQ.2000.887404

G. Dick, R.T. Wang

{"title":"Cryo-cooled sapphire oscillator operating above 35 K","authors":"G. Dick, R.T. Wang","doi":"10.1109/FREQ.2000.887404","DOIUrl":"https://doi.org/10.1109/FREQ.2000.887404","url":null,"abstract":"We present preliminary design features for a second generation thermomechanically compensated sapphire resonator. Developed a few years ago, the \"77 K CSO\" resonator showed a quality factor Q=2/spl times/10/sup 6/ at an operating temperature of 85 K, enabling a frequency stability of /spl delta/f/f<1/spl times/10/sup -13/. The new design promises a frequency stability of parts in 10/sup 15/ with cooling provided by a cryocooler consuming several hundred watts or less. Optimization of the resonator design for a temperature of 40 K results in a mechanical tuning rate requirement (MHz/micron) reduced by a factor of 8, allowing for reduced EM fields at the surface of the sapphire and reduced sensitivity to mechanical deformation. This optimized EM design is implemented in a self-assembling mechanical design that allows easy disassembly for cleaning, together with a first-order cancellation for expected mechanisms of physical creep. The new design is expected to share the very short thermal time constants characteristic of the 10 K and 77 K CSO resonators, thus allowing effective compensation of rapid temperature fluctuations.","PeriodicalId":294110,"journal":{"name":"Proceedings of the 2000 IEEE/EIA International Frequency Control Symposium and Exhibition (Cat. No.00CH37052)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127358987","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

Small size STW microwave source with temperature compensation and low g-vibration sensitivity 具有温度补偿和低g-振动灵敏度的小型STW微波源

Proceedings of the 2000 IEEE/EIA International Frequency Control Symposium and Exhibition (Cat. No.00CH37052) Pub Date : 2000-06-07 DOI: 10.1109/FREQ.2000.887375

Wei Zhou

引用次数: 0

Cryogenic sapphire oscillator with improved frequency stability 提高频率稳定性的低温蓝宝石振荡器

Proceedings of the 2000 IEEE/EIA International Frequency Control Symposium and Exhibition (Cat. No.00CH37052) Pub Date : 2000-06-07 DOI: 10.1109/FREQ.2000.887403

S. Chang, A. Mann, A. Luiten

引用次数: 11

Quartz crystal element for angular rate sensor 角速率传感器用石英晶体元件

Proceedings of the 2000 IEEE/EIA International Frequency Control Symposium and Exhibition (Cat. No.00CH37052) Pub Date : 2000-06-07 DOI: 10.1109/FREQ.2000.887335

H. Matsudo, M. Ishihara, S. Kawasaki, J. Yukawa, M. Hatanaka

引用次数: 9

Treatment of slip in a generalized acoustic load concept 广义声荷载概念中滑移的处理

Proceedings of the 2000 IEEE/EIA International Frequency Control Symposium and Exhibition (Cat. No.00CH37052) Pub Date : 2000-06-07 DOI: 10.1109/FREQ.2000.887327

R. Lucklum, G. McHale

引用次数: 4

Experimental verification of compensation phenomena in oscillators with two multiple modes 双多模振荡器补偿现象的实验验证

Proceedings of the 2000 IEEE/EIA International Frequency Control Symposium and Exhibition (Cat. No.00CH37052) Pub Date : 2000-06-07 DOI: 10.1109/FREQ.2000.887401

D. Tsarapkin, M.I. Chichvarin, I. A. Isakov

{"title":"Experimental verification of compensation phenomena in oscillators with two multiple modes","authors":"D. Tsarapkin, M.I. Chichvarin, I. A. Isakov","doi":"10.1109/FREQ.2000.887401","DOIUrl":"https://doi.org/10.1109/FREQ.2000.887401","url":null,"abstract":"The features of nonlinear processes in oscillators with two synchronous modes open up a new method of frequency stabilization, as in such oscillators the correlated normal frequency shifts of the same sign arising, for instance, due to temperature variations or active device reactance perturbations tend to compensate each other in respect of their influence on an oscillation period. This paper deals with experimental verification of the theory. Two cases of a harmonic ratio, 1:2 and 1:3, are investigated. The RF model used incorporates a transistor one-pole negative conductance active device loaded on a LC-filter with two multiple resonant frequencies. Both harmonic ratios provide easy and reproducible tuning at the compensation regime. The most remarkable demonstration of the discussed phenomenon takes place when the oscillator is overcompensated, as in this situation an oscillation frequency grows while a capacitor shunting the active device output is being increased. Frequency stability gain in excess of 40 dB in a rather wide range of parameters is registered in some tests.","PeriodicalId":294110,"journal":{"name":"Proceedings of the 2000 IEEE/EIA International Frequency Control Symposium and Exhibition (Cat. No.00CH37052)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130184349","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: 2

Bulk acoustic waves propagation in Li/sub 2/B/sub 4/O/sub 7/ piezoelectric crystals under the static uniaxial mechanical pressure 静单轴机械压力下体声波在Li/sub 2/B/sub 4/O/sub 7/压电晶体中的传播

Proceedings of the 2000 IEEE/EIA International Frequency Control Symposium and Exhibition (Cat. No.00CH37052) Pub Date : 2000-06-07 DOI: 10.1109/FREQ.2000.887356

K. S. Aleksandrov, P. P. Turchin, B. Sorokin, A. A. Karpovich, V. Nefedov

引用次数: 1