39th Annual Symposium on Frequency Control最新文献_第3页

A Novel Miniature ZT-Cut Resonator 一种新型微型ZT-Cut谐振器

39th Annual Symposium on Frequency Control Pub Date : 1985-05-29 DOI: 10.1109/FREQ.1985.200873

J. Hermann

引用次数: 10

Recent Developments in Synchronization and Tracking with Synchronous Oscillators 同步振荡器同步与跟踪的最新进展

39th Annual Symposium on Frequency Control Pub Date : 1985-05-29 DOI: 10.1109/FREQ.1985.200842

T. Flamouropoulos, V. Uzunoglu, M. White

引用次数: 3

Reducing TCXO Error After Aging Adjustment 减少老化调整后的TCXO误差

39th Annual Symposium on Frequency Control Pub Date : 1985-05-29 DOI: 10.1109/FREQ.1985.200839

R. Clark

引用次数: 1

Enhanced Composite Resonator Analysis and LTS Application to the Quartz Crystal Microbalance 增强型复合谐振腔分析及LTS在石英晶体微天平中的应用

39th Annual Symposium on Frequency Control Pub Date : 1985-05-29 DOI: 10.1109/FREQ.1985.200897

E. Benes, K. Harms, G. Thorn

引用次数: 3

Design for a Subcompact Q-Enhanced Active Maser 一种超小型q增强有源脉泽的设计

39th Annual Symposium on Frequency Control Pub Date : 1985-05-29 DOI: 10.1109/FREQ.1985.200822

R. Hayes, H.T.M. Wang

{"title":"Design for a Subcompact Q-Enhanced Active Maser","authors":"R. Hayes, H.T.M. Wang","doi":"10.1109/FREQ.1985.200822","DOIUrl":"https://doi.org/10.1109/FREQ.1985.200822","url":null,"abstract":"A design is presented for a compact hydrogen maser considerably smaller than those previously developed by this laboratory. The design uses cavity loading to reduce the diameter and length of the microwave cavity to 3 in., and Q-enhancement to achieve maser oscillation. The smaller cavity size leads to commensurate reductions in the size of several other components, particularly the magnetic shields, with the result that the assembled physics package (microwave cavity, vacuum chamber, dissociator, state selector and four nested magnetic shields) will fit within a 5.5-in. by 5.5-in. by 14-in. envelope. Significant improvements have also been made in the size and power consumption of the maser electronics. New, smaller components have allowed a complete microwave front-end (a 1.42-GEz amplifier, an active mixer, an active phase shifter and attenuator, a 5 to 1400-MHz frequency multiplier, several dividers and combiners) and a critical part of the cavity-control electronics to be housed in a 5.5-in. by 5.5-in. by 2-in. package. Further reductions in system size have been made possible by the commercial availability of integratedcircuit number controlled oscillators (NCOs), which have permitted the development of small, efficient frequency synthesizers for the receiver and cavitycontrol system. The maser which will result when all of these components are combined should prove very attractive for applications in which high stability, small package size and low weight are ll critical requirements.","PeriodicalId":291824,"journal":{"name":"39th Annual Symposium on Frequency Control","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129145560","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: 3

A Comparison of Frequency Noise of Quartz Resonators 石英谐振器频率噪声的比较

39th Annual Symposium on Frequency Control Pub Date : 1985-05-29 DOI: 10.1109/FREQ.1985.200832

J. Gagnepain

引用次数: 13

Highly Stable, Ovenized Bulk Shear Mode Resonators 高度稳定的烘烤体剪切模谐振器

39th Annual Symposium on Frequency Control Pub Date : 1985-05-29 DOI: 10.1109/FREQ.1985.200872

B. R. Ucavoy, S. V. Krisnaswamy, H. Salvo, R. A. Moore

{"title":"Highly Stable, Ovenized Bulk Shear Mode Resonators","authors":"B. R. Ucavoy, S. V. Krisnaswamy, H. Salvo, R. A. Moore","doi":"10.1109/FREQ.1985.200872","DOIUrl":"https://doi.org/10.1109/FREQ.1985.200872","url":null,"abstract":"In previous work we have demonstrated a parabolic frequency dependence on temperature for specific cuts of lithium tantalate excited by shear mode ZnO transd~cers(l*~). These cuts confirmed the validity of the computer model used to determine the first order zero temperature coefficient propagation directions(3s4). This work also demonstrated that nonpiezoelectric microwave resonators exhibiting temperature stability of an overtone frequency could be produced. Our current work is an extension of this effort with three goals: (1) Find more useful cuts in terms of providing a higher temperature turnover appropriate for stabilization by means of a themstated oven. (2) Provide increased vibration resistance by identifying crystal cuts which have minimum internal piezoelectric coupling with the requisite temperature behavior as in (1). (3) Permit the highest loaded Q with the requirements provided for in (1) and ( 2 ) . Toward these goals we have examined the temperature frequency characteristic of a new singly rotated cut of lithium tantalate. Several identical cuts were tested at a number of different microwave frequencies. The turnover region €or this new cut is from +6OoC to +80°C. The resonator plate orientation for which these results were obtained is a single rotation of the plate about x away from z to an angle near loo. Loaded Q values in excess of lo4 at 2 GHz have been measured. This value is believed to be limited by material defects distributed throughout the bulk of the crystal. These results show temperature stable high overtone bulk acoustic resonators (HEARS) with an application potential substantially greater than those shown before with a frequency stability exceeding parts per million with relatively simple temperature stabilization.","PeriodicalId":291824,"journal":{"name":"39th Annual Symposium on Frequency Control","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132922548","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: 1

The Amplitude-Frequency Effect in SC-Cut Resonators SC-Cut谐振器的幅频效应

39th Annual Symposium on Frequency Control Pub Date : 1985-05-29 DOI: 10.1109/FREQ.1985.200861

R. Filler

引用次数: 35

The Influence of Temperature and Electric Field on The Etch-Channel Density in Swept Cultured Quartz 温度和电场对扫掠培养石英中蚀刻通道密度的影响

39th Annual Symposium on Frequency Control Pub Date : 1985-05-29 DOI: 10.1109/FREQ.1985.200851

J. Gualtieri

{"title":"The Influence of Temperature and Electric Field on The Etch-Channel Density in Swept Cultured Quartz","authors":"J. Gualtieri","doi":"10.1109/FREQ.1985.200851","DOIUrl":"https://doi.org/10.1109/FREQ.1985.200851","url":null,"abstract":"It is known that sweeping can reduce the etch-channel density in quartz. Various electrode types may be used for sweeping quartz. Usually employed are platinum-foil electrodes under pressure or evaporated metallizations to the z-surfaces with pressure or welded contacts. The reduction in etchchannel density varies with the electrode type and with the temperature and applied field conditions. In the present work, emphasis was on studying sweeping with gold metallized z-surfaces. The temperature and field values which reduce etch-channel density to zero were investigated.* Under certain values of temperature and field, gold has been found to diffuse into the quartz. This diffusion correlates with the reduction of etch-channels to zero. Using dark-background light-scattering microscopy, it was found that etch-channels were originating at the surface intersection of straight growth tunnels as previously reported by Katz, et al. ,I and at irregularly curved defect lines (possibly precipitate decorated dislocations) which invariably connect the growth tunnels. After sweeping, metal decoration of both defect types was also observed using the light-scattering method.","PeriodicalId":291824,"journal":{"name":"39th Annual Symposium on Frequency Control","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127592624","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: 26

A Variational Method for the Design of Trapped Energy Resonators 一种设计困能谐振器的变分方法

39th Annual Symposium on Frequency Control Pub Date : 1985-05-29 DOI: 10.1109/FREQ.1985.200876

R. Peach

引用次数: 7