Pub Date : 2014-10-02DOI: 10.1109/CPEM.2014.6898542
Haibin Jin, Jing Wu, Li You, Zhiyuan Hu
For high-frequency resistive voltage divider, the distributed parameter model was studied and the key factors affecting its performance were discussed. The high-frequency characteristics of typical outer structure of voltage divider were simulated by ANSYS software. According to the reflection coefficient, VSWR and return loss, an optimized structure of divider for high frequency is presented.
{"title":"Research on key technology on designing high-frequency resistive voltage divider design","authors":"Haibin Jin, Jing Wu, Li You, Zhiyuan Hu","doi":"10.1109/CPEM.2014.6898542","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898542","url":null,"abstract":"For high-frequency resistive voltage divider, the distributed parameter model was studied and the key factors affecting its performance were discussed. The high-frequency characteristics of typical outer structure of voltage divider were simulated by ANSYS software. According to the reflection coefficient, VSWR and return loss, an optimized structure of divider for high frequency is presented.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122004353","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}
Pub Date : 2014-10-02DOI: 10.1109/CPEM.2014.6898315
S. Kim, Dong-Gwang Ha, Gwanyeol Park, Jiman Choi, J. Park, Woon Song, Soon-Gul Lee, H. Im, Hyungsang Kim, Y. Chong
We report our setup and measurement results of the quality factor Q of superconducting microwave resonators at mK temperature in a dilution refrigerator. The power dependence of the superconducting resonators' Q was measured down to the single photon level. Measurements were performed on two types of microwave resonators. First, a half-wavelength coplanar waveguide (CPW) resonator made of niobium film on an oxidized high-resistivity silicon substrate was measured. Then a rectangular box resonator made of machined superconducting aluminum alloy was measured. While the CPW chip resonator's Q value showed noticeable decrease at low microwave power, the box resonator's Q showed little power dependence. This setup is intended to perform characterization of various microwave resonators, which will serve as key components in superconducting qubit in circuit QED architecture.
{"title":"Power-dependence measurement of the quality factor of superconducting microwave resonators at mK temperature","authors":"S. Kim, Dong-Gwang Ha, Gwanyeol Park, Jiman Choi, J. Park, Woon Song, Soon-Gul Lee, H. Im, Hyungsang Kim, Y. Chong","doi":"10.1109/CPEM.2014.6898315","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898315","url":null,"abstract":"We report our setup and measurement results of the quality factor Q of superconducting microwave resonators at mK temperature in a dilution refrigerator. The power dependence of the superconducting resonators' Q was measured down to the single photon level. Measurements were performed on two types of microwave resonators. First, a half-wavelength coplanar waveguide (CPW) resonator made of niobium film on an oxidized high-resistivity silicon substrate was measured. Then a rectangular box resonator made of machined superconducting aluminum alloy was measured. While the CPW chip resonator's Q value showed noticeable decrease at low microwave power, the box resonator's Q showed little power dependence. This setup is intended to perform characterization of various microwave resonators, which will serve as key components in superconducting qubit in circuit QED architecture.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125750112","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}
Pub Date : 2014-10-02DOI: 10.1109/CPEM.2014.6898247
C. Kalmbach, J. Schurr, F. Ahlers, A. Muller, S. Novikov, N. Lebedeva, A. Satrapinski
We present first ac measurements of the quantized Hall resistance in graphene. Remarkably, the first results are very similar to that of conventional, unshielded GaAs devices. The future exploration of the detailed loss mechanisms in graphene by established ac analysis techniques thus gives a good chance to understand and to eliminate the ac losses, enabling a future graphene-based impedance standard.
{"title":"First ac measurements of the quantum Hall effect in epitaxial graphene","authors":"C. Kalmbach, J. Schurr, F. Ahlers, A. Muller, S. Novikov, N. Lebedeva, A. Satrapinski","doi":"10.1109/CPEM.2014.6898247","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898247","url":null,"abstract":"We present first ac measurements of the quantized Hall resistance in graphene. Remarkably, the first results are very similar to that of conventional, unshielded GaAs devices. The future exploration of the detailed loss mechanisms in graphene by established ac analysis techniques thus gives a good chance to understand and to eliminate the ac losses, enabling a future graphene-based impedance standard.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129210497","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}
Pub Date : 2014-10-02DOI: 10.1109/CPEM.2014.6898491
A. Katkov, G. Gubler, J. Lee, R. Behr, J. Nissila
This paper describes the investigation of the influence of harmonics in a signal that is measured by using an AC quantum voltmeter. Equations for parameters of the signal being measured, such as amplitude of the fundamental frequency that depends on the sampling frequency and harmonics are presented.
{"title":"Influence of harmonics on AC measurements using a quantum voltmeter","authors":"A. Katkov, G. Gubler, J. Lee, R. Behr, J. Nissila","doi":"10.1109/CPEM.2014.6898491","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898491","url":null,"abstract":"This paper describes the investigation of the influence of harmonics in a signal that is measured by using an AC quantum voltmeter. Equations for parameters of the signal being measured, such as amplitude of the fundamental frequency that depends on the sampling frequency and harmonics are presented.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122434899","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}
Pub Date : 2014-10-02DOI: 10.1109/CPEM.2014.6898279
M. Homklintian, T. Funck, J. Melcher, H. Bachmair
A determination of the frequency behaviour of the PTB calculable capacitor in the audio frequency range is carried out by applying an equivalent circuit model. The circuit model considers the influence of distributed admittances and impedances within the calculable capacitor and has been derived from the main currents flowing inside the calculable capacitor and the voltage drops caused by these currents. It has been found that the frequency dependence of the cross capacitance is proportional to the square of the frequency, whereby mutual inductances of opposite electrodes and capacitances to ground dominate the behaviour at higher frequencies. At a frequency of 1592 Hz, the correction of the PTB calculable capacitor with a value of 1 pF amounts to 9.2×10-8 pF with an expanded uncertainty (k = 2) of 3.1×10-8 pF.
{"title":"Calculated frequency behaviour of the PTB calculable capacitor in audio frequency range","authors":"M. Homklintian, T. Funck, J. Melcher, H. Bachmair","doi":"10.1109/CPEM.2014.6898279","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898279","url":null,"abstract":"A determination of the frequency behaviour of the PTB calculable capacitor in the audio frequency range is carried out by applying an equivalent circuit model. The circuit model considers the influence of distributed admittances and impedances within the calculable capacitor and has been derived from the main currents flowing inside the calculable capacitor and the voltage drops caused by these currents. It has been found that the frequency dependence of the cross capacitance is proportional to the square of the frequency, whereby mutual inductances of opposite electrodes and capacitances to ground dominate the behaviour at higher frequencies. At a frequency of 1592 Hz, the correction of the PTB calculable capacitor with a value of 1 pF amounts to 9.2×10-8 pF with an expanded uncertainty (k = 2) of 3.1×10-8 pF.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128560634","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}
Pub Date : 2014-10-02DOI: 10.1109/CPEM.2014.6898458
Yuan Gao, Honghui Li, Zengmin Wang
We developed a magnetic flux measurement system which is based on the binary Josephson system two years ago. After that, we continue researching on the improvement of magnetic flux measurement and start to focus on the precision measurement of the mutual inductance with the flux measurement system we built before. This paper introduces the mutual inductance measurement method which is based on the programmable Josephson system at NIM. Experimental results show that the type A uncertainty of the measurement of mutual inductances of 341 mH and 577 mH is less than 2 ppm, which demonstrates the feasibility and reliability of the flux and mutual inductance measurement method we proposed.
{"title":"Mutual inductance measurement with programmable Josephson system","authors":"Yuan Gao, Honghui Li, Zengmin Wang","doi":"10.1109/CPEM.2014.6898458","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898458","url":null,"abstract":"We developed a magnetic flux measurement system which is based on the binary Josephson system two years ago. After that, we continue researching on the improvement of magnetic flux measurement and start to focus on the precision measurement of the mutual inductance with the flux measurement system we built before. This paper introduces the mutual inductance measurement method which is based on the programmable Josephson system at NIM. Experimental results show that the type A uncertainty of the measurement of mutual inductances of 341 mH and 577 mH is less than 2 ppm, which demonstrates the feasibility and reliability of the flux and mutual inductance measurement method we proposed.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117165998","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}
Pub Date : 2014-10-02DOI: 10.1109/CPEM.2014.6898319
E. Paez, R. Callarotti, M. Azpúrua, Y. Sánchez
In this paper we present the calculation of the equivalent circuit's parameters for a magnetic loop-coupled cylindrical resonant cavity. This analysis is valid even for moderated quality factors, Q. The equivalent circuit is determined via field analysis using the Lagrangian formulation considering all terms of the mathematical formalism, whose RLC parameters are determined using a Vector Network Analyzer and the critical points method. This approach offers an interesting insight useful to characterize resonant cavities with potential application in electromagnetic material characterization.
{"title":"Determination of the equivalent circuit for a cylindrical loop-coupled cavity resonator","authors":"E. Paez, R. Callarotti, M. Azpúrua, Y. Sánchez","doi":"10.1109/CPEM.2014.6898319","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898319","url":null,"abstract":"In this paper we present the calculation of the equivalent circuit's parameters for a magnetic loop-coupled cylindrical resonant cavity. This analysis is valid even for moderated quality factors, Q. The equivalent circuit is determined via field analysis using the Lagrangian formulation considering all terms of the mathematical formalism, whose RLC parameters are determined using a Vector Network Analyzer and the critical points method. This approach offers an interesting insight useful to characterize resonant cavities with potential application in electromagnetic material characterization.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"187 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117273652","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}
Pub Date : 2014-10-02DOI: 10.1109/CPEM.2014.6898493
G. Granger, Barry Wood
A 10 V programmable Josephson voltage standard system has been installed at the National Research Council Canada. The current margins for the first Josephson step at either current polarity are greater than 1 mA. A preliminary direct comparison of this programmable system with a hysteretic Josephson voltage standard is performed at 10 V.
{"title":"Preliminary comparison of a 10 V programmable josephson voltage standard and a hysteretic josephson voltage standard","authors":"G. Granger, Barry Wood","doi":"10.1109/CPEM.2014.6898493","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898493","url":null,"abstract":"A 10 V programmable Josephson voltage standard system has been installed at the National Research Council Canada. The current margins for the first Josephson step at either current polarity are greater than 1 mA. A preliminary direct comparison of this programmable system with a hysteretic Josephson voltage standard is performed at 10 V.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115162881","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}
Pub Date : 2014-10-02DOI: 10.1109/CPEM.2014.6898322
L. Oberto, M. Bisi, D. Jahn, S. Lippert, L. Brunetti
The European Metrology Research Program Project NEW-07 “Microwave and Terahertz metrology for homeland security” is aimed to develop metrological traceability of sources and detectors in sub-mm and THz frequency bands as a prerequisite for the traceability of more complex THz measurement systems, such as spectrometers, body scanners and imaging systems. In this framework, a Time Domain Spectrometer working up to about 3 THz has been set-up at Istituto Nazionale di Ricerca Metrologica, Italy. Its characteristics are here described. First characterization measurements have been done and are here reported in terms of stability and bandwidth and signal to noise ratio achievable with different kind of emitters.
{"title":"Set-up of a THz Time Domain Spectrometer at INRIM","authors":"L. Oberto, M. Bisi, D. Jahn, S. Lippert, L. Brunetti","doi":"10.1109/CPEM.2014.6898322","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898322","url":null,"abstract":"The European Metrology Research Program Project NEW-07 “Microwave and Terahertz metrology for homeland security” is aimed to develop metrological traceability of sources and detectors in sub-mm and THz frequency bands as a prerequisite for the traceability of more complex THz measurement systems, such as spectrometers, body scanners and imaging systems. In this framework, a Time Domain Spectrometer working up to about 3 THz has been set-up at Istituto Nazionale di Ricerca Metrologica, Italy. Its characteristics are here described. First characterization measurements have been done and are here reported in terms of stability and bandwidth and signal to noise ratio achievable with different kind of emitters.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"238 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115752033","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}
Pub Date : 2014-10-02DOI: 10.1109/CPEM.2014.6898617
C. H. Hall Barbosa, J. Hallstrom, M. Silva, L. C. Azevedo, L. C. Faria
The International Electrotechnical Commission (IEC) issued in 2010 a revision of the family of standards IEC 60060, describing, among other requirements, how to calculate the various amplitude and time parameters used to evaluate high voltage impulse waveforms. However, the standards are not clear in some aspects, especially when describing tail chopped lightning impulses. This paper aims at describe in detail how to properly estimate the time parameters of such impulses.
{"title":"Estimation of time parameters of tail chopped lightning impulses - Clarification of the standard IEC 60060-1/2010","authors":"C. H. Hall Barbosa, J. Hallstrom, M. Silva, L. C. Azevedo, L. C. Faria","doi":"10.1109/CPEM.2014.6898617","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898617","url":null,"abstract":"The International Electrotechnical Commission (IEC) issued in 2010 a revision of the family of standards IEC 60060, describing, among other requirements, how to calculate the various amplitude and time parameters used to evaluate high voltage impulse waveforms. However, the standards are not clear in some aspects, especially when describing tail chopped lightning impulses. This paper aims at describe in detail how to properly estimate the time parameters of such impulses.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"64 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125945823","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}
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