2018 IEEE International Frequency Control Symposium (IFCS)最新文献_第8页

Effect of Local Oscillator Performance on Ultrawideband Indoor Localization System 本振性能对超宽带室内定位系统的影响

2018 IEEE International Frequency Control Symposium (IFCS) Pub Date : 2018-05-01 DOI: 10.1109/FCS.2018.8597520

A. Hati, Fabio C.S. Daxilva, V. Gerginov, C. Nelson

引用次数: 0

High $k_{t}^{2}cdot Q$ Waveguide-Based ScAlN-on-Si UHF and SHF Resonators 高$k_{t}^{2}cdot Q$波导的单晶硅上标硅(ScAlN-on-Si)超高频和超高频谐振器

2018 IEEE International Frequency Control Symposium (IFCS) Pub Date : 2018-05-01 DOI: 10.1109/FCS.2018.8597447

M. Ghatge, V. Felmetsger, R. Tabrizian

{"title":"High $k_{t}^{2}cdot Q$ Waveguide-Based ScAlN-on-Si UHF and SHF Resonators","authors":"M. Ghatge, V. Felmetsger, R. Tabrizian","doi":"10.1109/FCS.2018.8597447","DOIUrl":"https://doi.org/10.1109/FCS.2018.8597447","url":null,"abstract":"This paper reports, for the first time, on waveguide-based resonators implemented in scandium-doped aluminum nitride-on-silicon (ScAlN-on-Si) stack to simultaneously benefit from large piezoelectric constants of ScAlN and low acoustic dissipation in single crystal silicon. <tex>$1mumathbf{m}$</tex>-thick ScAlN film with Sc content of 7% is reactively sputtered on silicon substrates using ac-powered dual-target S-gun magnetron with Al targets containing embedded pure Sc pellets. A Cl<inf>2</inf>/H<inf>2</inf> based low-power plasma etching recipe is developed to pattern resonators with smooth vertical sidewalls. In-and out-of-plane waveguide-based resonator prototypes with large electromechanical coupling coefficient <tex>$(mathbf{k}_{mathbf{t}}^{2})$</tex> and high quality-factor <tex>$(mathbf{Q})$</tex> are implemented over 80 MHz-3.5 GHz demonstrating <tex>$k_{t}^{2}$</tex> of 0.7<sup>%</sup>-2.9<sup>%</sup> and <tex>$mathbf{Q}$</tex> of 2000–6400. Specifically, a high <tex>$mathbf{f}_{0}times mathbf{Q}$</tex> of <tex>$4.3times 10^{12}$</tex> is measured for a resonator at 3.5 GHz, and a high <tex>$mathbf{k}_{mathbf{t}}^{2}times mathbf{Q}$</tex> of 51 is measured at 108 MHz. The large <tex>$mathbf{k}_{mathbf{t}}^{2}times mathbf{Q}$</tex> of ScAlN-on-Si waveguide-based resonators along with lithographical frequency tailorability demonstrate their potential for realization of highly integrated front-end filters for multi-band 5G systems.","PeriodicalId":180164,"journal":{"name":"2018 IEEE International Frequency Control Symposium (IFCS)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114520434","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

A Proposal for Absolute Inertial Imaging Using Two Mechanical Modes 一种采用两种机械模式的绝对惯性成像方法

2018 IEEE International Frequency Control Symposium (IFCS) Pub Date : 2018-05-01 DOI: 10.1109/FCS.2018.8597557

A. Ganesan, A. Seshia

引用次数: 0

A Low SWaP-C Prototype Ka-Band Frequency Synthesizer for Atomic Clocks 用于原子钟的低SWaP-C原型ka波段频率合成器

2018 IEEE International Frequency Control Symposium (IFCS) Pub Date : 2018-05-01 DOI: 10.1109/FCS.2018.8597514

Michael O. Toennies, L. Yit, E. Burt, R. Tjoelker

引用次数: 0

Selected Studies on High Performance Laser-Pumped Rubidium Atomic Clocks 高性能激光泵浦铷原子钟的研究

2018 IEEE International Frequency Control Symposium (IFCS) Pub Date : 2018-05-01 DOI: 10.1109/FCS.2018.8597452

C. Affolderbach, N. Almat, M. Gharavipour, F. Gruet, W. Moreno, M. Pellaton, G. Mileti

引用次数: 5

Phase Noise Measurement of RF Devices Using Full Digital Phase Noise Measurement Method 用全数字相位噪声测量方法测量射频器件的相位噪声

2018 IEEE International Frequency Control Symposium (IFCS) Pub Date : 2018-05-01 DOI: 10.1109/FCS.2018.8597532

Kazuya Xoucm, T. Imaike

引用次数: 2

A Novel High Resolution Optical Time Delay Cable Measurement System Utilized in Fiber Verification in Radio Interferometry 一种用于无线电干涉测量中光纤验证的新型高分辨率光延时电缆测量系统

2018 IEEE International Frequency Control Symposium (IFCS) Pub Date : 2018-05-01 DOI: 10.1109/FCS.2018.8597450

R. Julie, T. Abbott, J. Burger, R. Siebrits

{"title":"A Novel High Resolution Optical Time Delay Cable Measurement System Utilized in Fiber Verification in Radio Interferometry","authors":"R. Julie, T. Abbott, J. Burger, R. Siebrits","doi":"10.1109/FCS.2018.8597450","DOIUrl":"https://doi.org/10.1109/FCS.2018.8597450","url":null,"abstract":"A long distance optical fiber cable measurement is described that delivers ~0.2 picosecond (ps) delay resolution with capability for high accuracy relative distance extraction over 10's of microseconds of delay. This is necessary in radio interferometry, for verification, but has general applicability to many situations found in optical fiber transport. For radio interferometry one can use direct RF over fiber to transport the hydrogen maser clock source, and measurement of fiber to certain points in the cable system is very important. The long distance measurements are used to show that the thermal stability of the buried optical fiber cable keeps the propagation delay changes on the optical fiber link stable to less than 9.5 ps over 20 minutes, meeting a key requirement for phase margins for interferometry. The measurement method shows great promise in general optical fiber measurement for optical cables over long distances, with high resolution and dynamic range, enabling capabilities better than those offered by normal OTDR (Optical Time Domain Reflectometer) or OFDR (Optical Frequency Domain Reflectometer) methods.","PeriodicalId":180164,"journal":{"name":"2018 IEEE International Frequency Control Symposium (IFCS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128059834","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: 5

Dissemination of Reference Signals for a Next Generation Radio Telescope 为下一代射电望远镜传播参考信号

2018 IEEE International Frequency Control Symposium (IFCS) Pub Date : 2018-05-01 DOI: 10.1109/FCS.2018.8597492

R. Siebrits, J. Burger, G. Adams, R. Gamatham, F. Kapp, T. Abbott, S. Malan, E. Bauermeister, L. Boyana, H. Kriel, M. Welz, N. Mnyandu, A. Otto, C. Vander Merwe, S. Tshongweni, T. Gibbon

{"title":"Dissemination of Reference Signals for a Next Generation Radio Telescope","authors":"R. Siebrits, J. Burger, G. Adams, R. Gamatham, F. Kapp, T. Abbott, S. Malan, E. Bauermeister, L. Boyana, H. Kriel, M. Welz, N. Mnyandu, A. Otto, C. Vander Merwe, S. Tshongweni, T. Gibbon","doi":"10.1109/FCS.2018.8597492","DOIUrl":"https://doi.org/10.1109/FCS.2018.8597492","url":null,"abstract":"A fully integrated system for transmitting atomic clock signals over optical fibre in a high branching ratio (64) directly to L-Band Digitiser units is demonstrated to achieve ultra low jitter, sub picosecond phasing and sub nanosecond timing. The Digitiser units are located on each MeerKatradio telescope antenna which is located 6 km to 12 km from the transmitter. A 1712 MHz sampling clock and a pulse per second signal are transmitted to the Digitisers by RF over Fibre techniques. The Digitisers demodulate the timing signals and use them internally to timestamp astrophysical signals which are sampled at a rate of 1712 MSPS. The integrated jitter of the sample clock transmitter is 70 fs and the RMS phase drift over 20 minutes is 140 fs RMS at the Digitiser units connected to short lengths of fibre. Sub sample period phase variation with a short term standard deviation of < 320 ps is demonstrated between the timing pulses and RF sample clock zero crossing cycles utilizing on board time interval counting on the Digitisers. An integrated time of flight measurement is also performed by the transmitter, to compensate for differential path delays between antennas, with an estimated uncertainty of <1 ns. The system is unique in that it supplies reference clock and timing signals directly to the point of sampling inside Digitisers placed after the receivers of the telescope. The final system is fully EMC qualified. Interferometry was utilized for initial verification of the full telescope phasing stability and drift of the order of 20 ps over 4 hours was achieved.","PeriodicalId":180164,"journal":{"name":"2018 IEEE International Frequency Control Symposium (IFCS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127923628","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: 4

Near-Zero TCF of HAL SAW Resonator with LiTaO3-on-Quartz Structure LiTaO3-on-Quartz结构HAL SAW谐振器的近零TCF

2018 IEEE International Frequency Control Symposium (IFCS) Pub Date : 2018-05-01 DOI: 10.1109/FCS.2018.8597496

M. Kadota, Y. Yunoki, T. Shimatsu, Miyuki Uomot, Shuji Tanaka

引用次数: 14

Comparison and Analysis of One-Way Time Transfer Based on GPS and CAPS Constellations 基于GPS和CAPS星座的单向时间传递比较与分析

2018 IEEE International Frequency Control Symposium (IFCS) Pub Date : 2018-05-01 DOI: 10.1109/FCS.2018.8597515

Cheng Jingya, Xu Longxia, L. Xiaohui, Ju Jun

引用次数: 1