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2018 European Frequency and Time Forum (EFTF)最新文献

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Inkjet printing of thin electrodes for quartz resonators 石英谐振器用薄电极的喷墨打印
2018 European Frequency and Time Forum (EFTF) Pub Date : 2018-04-10 DOI: 10.1109/EFTF.2018.8408986
A. Saadani, P. Lavenus, O. Le Traon, G. Hwang, F. Sthal
{"title":"Inkjet printing of thin electrodes for quartz resonators","authors":"A. Saadani, P. Lavenus, O. Le Traon, G. Hwang, F. Sthal","doi":"10.1109/EFTF.2018.8408986","DOIUrl":"https://doi.org/10.1109/EFTF.2018.8408986","url":null,"abstract":"A first vibrating inertial quartz gyrometer with gold nanoparticles electrodes is presented in this paper. Electrical measurements have shown enhancement of the quality factor compared to standard gyrometers with 200 nm evaporated gold electrodes.","PeriodicalId":395582,"journal":{"name":"2018 European Frequency and Time Forum (EFTF)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128098097","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: 0
Study of the phase noise of Langatate crystal resonators langate晶体谐振器相位噪声的研究
2018 European Frequency and Time Forum (EFTF) Pub Date : 2018-04-10 DOI: 10.1109/EFTF.2018.8408992
A. Pokharel, F. Sthal, E. Vaillant, J. Imbaud, J. Boy, F. Esnault, G. Cibiel
{"title":"Study of the phase noise of Langatate crystal resonators","authors":"A. Pokharel, F. Sthal, E. Vaillant, J. Imbaud, J. Boy, F. Esnault, G. Cibiel","doi":"10.1109/EFTF.2018.8408992","DOIUrl":"https://doi.org/10.1109/EFTF.2018.8408992","url":null,"abstract":"In this paper, the intrinsic study on Langatate (LGT) crystal resonators has been carried out at 10 MHz resonant frequency. Among the crystals belonging to the Langasite family, the Langatate (La3Ga5.5Ta0.5O14) also called LGT seems to be an alternative option to substitute the quartz crystal resonators for frequency and time applications. The intrinsic properties like electromechanical coupling coefficients, product of quality factor and frequency are normally seen higher than in quartz crystal resonators. Moreover, the amplitude-frequency effect and the force-frequency coefficient are lower. The characterization of these resonators is given in terms of impedance, Q-factors, turnover temperature, amplitude-frequency effect and phase noise. The short-term stability of some resonator pairs has been measured about 31013 in terms of Allan standard deviation.","PeriodicalId":395582,"journal":{"name":"2018 European Frequency and Time Forum (EFTF)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127051626","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
An anti-jamming system for GNSS timing applications 用于GNSS授时应用的抗干扰系统
2018 European Frequency and Time Forum (EFTF) Pub Date : 2018-04-10 DOI: 10.1109/EFTF.2018.8409021
J. Querol, Adriano Camps, Esteban Garbin Manfredini, R. Piriz
{"title":"An anti-jamming system for GNSS timing applications","authors":"J. Querol, Adriano Camps, Esteban Garbin Manfredini, R. Piriz","doi":"10.1109/EFTF.2018.8409021","DOIUrl":"https://doi.org/10.1109/EFTF.2018.8409021","url":null,"abstract":"Radio-Frequency Interference (RFI) and jamming are increasing problems for timing applications based on Global Navigation Satellite Systems (GNSS). FENIX-lite is a real-time pre-correlation anti-jamming system designed to provide increased resilience against RFI/jamming in critical GNSS-enabled applications. This work aims to evaluate the combined performance of FENIX-lite and a timing setup composed by two GNSS disciplined oscillators named DOWR. The results show that FENIX provides an anti-jamming resilience of 10–30 dB, at the expense of introducing a small bias and an additional jitter of 2-4 ns.","PeriodicalId":395582,"journal":{"name":"2018 European Frequency and Time Forum (EFTF)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134353108","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
Optimal traceability to the SI second through TAI 从SI秒到TAI的最佳可追溯性
2018 European Frequency and Time Forum (EFTF) Pub Date : 2018-04-10 DOI: 10.1109/EFTF.2018.8409028
G. Petit, G. Panfilo
{"title":"Optimal traceability to the SI second through TAI","authors":"G. Petit, G. Panfilo","doi":"10.1109/EFTF.2018.8409028","DOIUrl":"https://doi.org/10.1109/EFTF.2018.8409028","url":null,"abstract":"The frequency of a secondary frequency standard needs to be determined in the SI, by comparison to that of the Cs hyperfine transition. When no direct comparison to such a primary frequency standard is possible, the SI second can also be accessed through TAI. Based on the experience of several recent experiments, we propose an approach providing optimal access to the SI second through TAI and show that it can be used for any laboratory even those not participating to UTC. We estimate the presently achievable uncertainty and show how it could be improved under realistic considerations in the coming years.","PeriodicalId":395582,"journal":{"name":"2018 European Frequency and Time Forum (EFTF)","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123058018","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
Microwave acoustic properties of diamond based HBAR at low temperatures 低温下金刚石基HBAR的微波声学特性
2018 European Frequency and Time Forum (EFTF) Pub Date : 2018-04-10 DOI: 10.1109/EFTF.2018.8408984
B. Sorokin, Gennady M. Kvashmn, A. S. Novoselov, A. B. Shipilov
{"title":"Microwave acoustic properties of diamond based HBAR at low temperatures","authors":"B. Sorokin, Gennady M. Kvashmn, A. S. Novoselov, A. B. Shipilov","doi":"10.1109/EFTF.2018.8408984","DOIUrl":"https://doi.org/10.1109/EFTF.2018.8408984","url":null,"abstract":"Original technique for low-temperature microwave acoustic investigations of single crystalline diamond by HBAR operating on bulk acoustic wave has been developed for the first time. Study of the temperature and frequency dependences for HBAR's quality factor in experimental samples as Al/AlN/Mo/diamond was carried out in a wide frequency range 0.5–10 GHz and temperatures of 4–400 K. The transition between Akhiezer's and Landau-Rumer's acoustic attenuation modes in diamond has been investigated in details.","PeriodicalId":395582,"journal":{"name":"2018 European Frequency and Time Forum (EFTF)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132085658","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
Microwave field amplitude stabilization using Ramsey spectroscopy signal 利用拉姆齐光谱信号稳定微波场振幅
2018 European Frequency and Time Forum (EFTF) Pub Date : 2018-04-10 DOI: 10.1109/EFTF.2018.8409002
M. Gozzelino, A. Godone, S. Micalizio, F. Levi, C. Calosso
{"title":"Microwave field amplitude stabilization using Ramsey spectroscopy signal","authors":"M. Gozzelino, A. Godone, S. Micalizio, F. Levi, C. Calosso","doi":"10.1109/EFTF.2018.8409002","DOIUrl":"https://doi.org/10.1109/EFTF.2018.8409002","url":null,"abstract":"We present a method to actively stabilize the amplitude of the microwave field which constitutes the probe for many state-of-the-art compact atomic clocks. The method applies to clocks working in pulsed operation, specifically with a Ramsey scheme. The proposed technique relies on information directly extracted from the clock atomic signal, as it computes the gradient in the two variables (amplitude and frequency) characterizing the probe field, instead of differentiating solely the frequency response, as in usual operation. Magnetic field sensing based on spectroscopy has proven to be a valuable tool for metrology and precise measurement field. We demonstrate the advantage of using the spectroscopic signal to stabilize the microwave field amplitude, in order to reach 10−15 stability with compact clocks, by mitigating cavity-pulling shift effects.","PeriodicalId":395582,"journal":{"name":"2018 European Frequency and Time Forum (EFTF)","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134366686","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: 0
Development status of the Rb POP space clock for GNSS applications 用于GNSS应用的Rb POP空间时钟的发展现状
2018 European Frequency and Time Forum (EFTF) Pub Date : 2018-04-10 DOI: 10.1109/EFTF.2018.8409000
P. Arpesi, J. Belfi, M. Gioia, N. Marzoli, R. Romani, A. Sapia, M. Gozzelino, C. Calosso, F. Levi, S. Micalizio, A. Tuozzi, M. Belloni
{"title":"Development status of the Rb POP space clock for GNSS applications","authors":"P. Arpesi, J. Belfi, M. Gioia, N. Marzoli, R. Romani, A. Sapia, M. Gozzelino, C. Calosso, F. Levi, S. Micalizio, A. Tuozzi, M. Belloni","doi":"10.1109/EFTF.2018.8409000","DOIUrl":"https://doi.org/10.1109/EFTF.2018.8409000","url":null,"abstract":"We present the status of the industrialization activity of a Rubidium POP (Pulsed Optically Pumped) clock Physics Package (PP) designed to meet the harsh space environment and more than 12 years of life-time. Leonardo completed the design phase including thermal, mechanical and magnetic analyses. PP manufacturing started at the beginning of 2018. The vibration test on the full microwave cavity assembly prototype including the Rb cell is foreseen by the first half of the year. The target for the Rb POP industrialization activity is to achieve a space qualification of the full clock by 2020 and the readiness for experimental flight by 2022.","PeriodicalId":395582,"journal":{"name":"2018 European Frequency and Time Forum (EFTF)","volume":"267 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133982926","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
Analysis of resonant sensors based on mutually injection-locked oscillators beyond the critical Duffing amplitude 超过临界Duffing幅值的互注入锁振谐振传感器分析
2018 European Frequency and Time Forum (EFTF) Pub Date : 2018-04-10 DOI: 10.1109/EFTF.2018.8409011
J. Juillard, A. Mostafa, Pietro M. Ferreira
{"title":"Analysis of resonant sensors based on mutually injection-locked oscillators beyond the critical Duffing amplitude","authors":"J. Juillard, A. Mostafa, Pietro M. Ferreira","doi":"10.1109/EFTF.2018.8409011","DOIUrl":"https://doi.org/10.1109/EFTF.2018.8409011","url":null,"abstract":"Sensor architectures based on coupled resonators are receiving increased interest from the resonant sensing community. Certain output metrics of such sensors have an increased sensitivity to the measurand, compared to conventional resonant sensors with frequency-modulated outputs. In the present paper, we extend our study of the properties of mutually injection-locked oscillators (MILOs) into the nonlinear domain, assuming the resonators are subject to cubic restoring forces. Our analysis shows that, depending on the softening or hardening character of the nonlinearity, some MILOs may be operated well above the critical Duffing amplitude. Moreover, it turns out that all the output metrics of such MILOs are not similarly affected by noise. A typical example is given, in which we show that, above the critical Duffing amplitude, phase difference measurements are limited by the A-f effect, whereas amplitude ratio measurements are not. These theoretical results are supported by transient simulations.","PeriodicalId":395582,"journal":{"name":"2018 European Frequency and Time Forum (EFTF)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122740225","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
Influence of the acoustic energy distribution on the in-liquid sensitivity of thin film electroacoustic resonators 声能分布对薄膜电声谐振器液中灵敏度的影响
2018 European Frequency and Time Forum (EFTF) Pub Date : 2018-04-10 DOI: 10.1109/EFTF.2018.8409014
T. Mirea, J. Olivares, M. Clement, E. Iborra
{"title":"Influence of the acoustic energy distribution on the in-liquid sensitivity of thin film electroacoustic resonators","authors":"T. Mirea, J. Olivares, M. Clement, E. Iborra","doi":"10.1109/EFTF.2018.8409014","DOIUrl":"https://doi.org/10.1109/EFTF.2018.8409014","url":null,"abstract":"In contrast to quartz crystal microbalances, the sensitivity of thin film bulk acoustic wave resonators (FBARs) is strongly dependent on all layers composing the composite structure. Previous studies of the pure mass sensitivity of suspended FBARs, proved that placing low acoustic impedance materials at the sensing surface of the device can enhance their sensitivity by carefully controlling the energy trapping effects. Here we extend those studies by investigating if the in-liquid sensitivity of shear-mode AlN-based solidly mounted resonators (SMRs), working at 2 GHz, display a similar dependence on the device configuration (top electrode thickness and material). We use the finite element method (FEM) and experimental results to demonstrate that if one is restricted by the readout circuit to a certain resonant frequency, the sensitivity of the devices (particularly in-liquid sensors or biosensors) can be boosted by proper design while preserving the initial frequency. This is possible since the variations in sensitivity are strongly dependent on the energy distribution within the whole resonant structure.","PeriodicalId":395582,"journal":{"name":"2018 European Frequency and Time Forum (EFTF)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127515448","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
Reactive sputtering of AlScN thin Ulms with variable Sc content on 200 mm wafers 变Sc含量AlScN薄Ulms在200mm晶圆上的反应溅射
2018 European Frequency and Time Forum (EFTF) Pub Date : 2018-04-10 DOI: 10.1109/EFTF.2018.8408987
M. Clement, V. Felmetsger, T. Mirea, E. Iborra
{"title":"Reactive sputtering of AlScN thin Ulms with variable Sc content on 200 mm wafers","authors":"M. Clement, V. Felmetsger, T. Mirea, E. Iborra","doi":"10.1109/EFTF.2018.8408987","DOIUrl":"https://doi.org/10.1109/EFTF.2018.8408987","url":null,"abstract":"Sc-doped AlN polycrystalline films are attractive active layers for high frequency (GHz range) acoustic resonators owing to the significant enlargement of the AlN piezoelectric activity with the increasing Sc content. To sputter homogenously doped AlScN films on 200 mm Si wafers we use a configurable cathode containing a variable number of embedded Sc pellets to fine tuning the Sc content in the films. The method was implemented in an Endeavor-AT™ cluster tool from OEM Group, adapted for sputtering on 200 mm wafers. 1 μm thick AlScN films with uniform Sc content (around 7 at.%), high crystal quality and good piezoelectric response have been sputtered over 200 mm production-level wafers.","PeriodicalId":395582,"journal":{"name":"2018 European Frequency and Time Forum (EFTF)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127734319","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
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