时间频率公报最新文献_第8页

A magnetometer based on coherent population beating 基于相干人口跳动的磁力计

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138848

Li Liu, Yigen Wang, Xiao-na Zhao, Yuxin Zhuang, Zhong Wang

引用次数: 0

Compact clocks for industrial applications: The EMRP project IND 55 MClocks 用于工业应用的紧凑型时钟:EMRP项目IND 55 MClocks

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138881

S. Micalizio, F. Levi, A. Godone, C. Calosso, B. François, S. Guérandel, D. Holleville, E. de Clercq, L. de Sarlo, P. Yun, J. Danet, M. Langlois, R. Boudot, M. A. Hafiz, E. Şahin, C. Affolderbach, S. Kang, F. Gruet, M. Gharavipour, G. Mileti, B. Desruelle

引用次数: 0

Modelling and control of a travelling wave in a finite beam, using multi-modal approach and vector control method 基于多模态方法和矢量控制方法的有限梁行波建模与控制

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138895

S. Ghenna, F. Giraud, C. Giraud-Audine, M. Amberg, B. Lemaire-Semail

引用次数: 7

Precise three-channel integrated time counter 精确的三通道集成时间计数器

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138910

R. Szplet, P. Kwiatkowski, Z. Jachna, K. Rozyc

引用次数: 2

Balanced low-loss 2-IDT double mode SAW filter with narrowed passband and improved selectivity 平衡低损耗2-IDT双模SAW滤波器，窄通带和提高选择性

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138864

D. Sergei

{"title":"Balanced low-loss 2-IDT double mode SAW filter with narrowed passband and improved selectivity","authors":"D. Sergei","doi":"10.1109/FCS.2015.7138864","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138864","url":null,"abstract":"This paper presents the new balanced low-loss DMS filter with the narrowed passband and improved selectivity on 42° YX LiTaO3. The filter is realized as two-transducer scheme. A narrow passband of the filter is obtained by choosing a definite gap length between the input and output IDTs. Also the both long weighted input IDT and reflectors are used. A shape of the frequency response of the filter is determined by the weighting function of the input IDT, number of the electrodes in output IDT and reflectors, relationship between the electrode pitches in the input IDT, output IDT and reflectors. An optimization of the mentioned parameters with a computer simulation using equivalent circuit model allows to get a specified high selectivity of the filter with a fractional bandwidth of 0.5-0.6% under condition that the insertion losses are low and input and output impedances are close to the specified real values. To decrease the input and output impedances the parallel connection of the two filters in the different acoustic tracks is used. To improve the selectivity of the filter the cascaded connection and phase weighting the input IDT are employed. The 300 MHz sample of the balanced SAW filter has shown an insertion loss of 3 dB, 2-dB bandwidth of 1.5 MHz, stopband attenuation of 70 dB at ±12 MHz offsets from a center frequency in a 75-Ω balanced system. The filter did not require the matching elements and housed in the 9.1×7.1×2 mm SMD package.","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"11 1","pages":"388-391"},"PeriodicalIF":0.0,"publicationDate":"2015-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84603455","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

Comparison of different carrier-envelope frequency stabilization methods for a high performance DPSSL frequency comb 一种高性能DPSSL频率梳不同载波包络稳频方法的比较

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138915

S. Kundermann, S. Lecomte

引用次数: 2

Mercury lamp studies in support of trapped ion frequency standards 支持捕获离子频率标准的汞灯研究

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138820

L. Yi, E. Burt, R. Tjoelker

{"title":"Mercury lamp studies in support of trapped ion frequency standards","authors":"L. Yi, E. Burt, R. Tjoelker","doi":"10.1109/FCS.2015.7138820","DOIUrl":"https://doi.org/10.1109/FCS.2015.7138820","url":null,"abstract":"The mercury linear ion trap frequency standard (LITS) [1] at JPL continues to advance with multiple applications. In particular, the outstanding long-term stability [2] and practicality of the ground-based clock have attracted significant interests for time-keeping and metrology. However, the mercury RF discharge lamp used for optical pumping and state detection may limit the ultimate stability performance of the clock [3-4], constraining even broader application. For mercury ion frequency standards, the operational lamp behavior is described by the ratio of useful light at 194nm and unwanted background light at 254nm (194/254). This ratio has been observed to depend on several factors Increasing the 194nm output decreases optical pumping times and an increase of the 194/254 ratio improves the clock signal-to-noise ratio (SNR). These improvements lead to an improvement in clock short-term stability and enable the use of an even broader range of local oscillators. We have carried out several experiments to unfold the relationship between the 194/254 and the fabrication factors: buffer gas pressure, lamp ID, and the quantity of mercury. The quantitative results may be used to improve the process of lamp fabrication for mercury ion frequency standards. The research here may also shed light on other lamp-based applications.","PeriodicalId":57667,"journal":{"name":"时间频率公报","volume":"27 1","pages":"188-192"},"PeriodicalIF":0.0,"publicationDate":"2015-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83689144","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 Time Validation Facility (TVF): An all-new key element of the Galileo operational phase 时间验证设施(TVF):伽利略操作阶段的一个全新的关键元素

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138851

R. Piriz, D. Rodríguez, P. Roldan, A. Mudrak, A. Bauch, F. Riedel, E. Staliuniene, J. Galindo, H. Esteban, I. Sesia, G. Cerretto, K. Jaldehag, C. Rieck, P. Uhrich, G. Rovera

引用次数: 8

The study of BeiDou timing receiver delay calibration 北斗授时接收机时延标定研究

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138902

Hongbo Wang, Hang Yi, Shengkang Zhang, Haifeng Wang, F. Shi, Huaiying Shang, Yujie Yang, J. Ge, Zhiqi Li

引用次数: 4

87Rb isoclinic point thermometry 87Rb等斜点测温

时间频率公报 Pub Date : 2015-04-12 DOI: 10.1109/FCS.2015.7138786

N. Wells, T. Driskell, J. Camparo

引用次数: 1