Pub Date : 2012-12-31DOI: 10.1109/EMCEUROPE.2012.6396742
D. Burger, S. Tenbohlen, W. Kohler, W. Ebbinghaus
Switching operations in the primary circuits of medium voltage switchgears are mostly attended by discharge processes in terms of pre- and restrikes between the switch contacts. Due to their high amplitudes as well as their steep wave fronts, such discharges are known to be very broadband and severe sources of electromagnetic disturbance. This contribution deals with the origin and the consequences of repetitively occurring electromagnetic disturbance pulses due to multiple restrikes at vacuum circuit breakers. On the basis of measurements at a special switchgear test setup, the impact of multiple restrikes at vacuum circuit breakers on the EMC of the switchgear installation is analyzed in time and frequency domain. Based on the results, the severity of multiple restrikes is estimated by comparing the disturbance values with conventional (well known) switching disturbances like during disconnector operations. Finally, some approaches for the handling of multiple restrikes at vacuum circuit breakers with respect to the EMC aspects are given in the summary.
{"title":"Impact of multiple restrikes at vacuum circuit breakers on the EMC of medium voltage switchgear","authors":"D. Burger, S. Tenbohlen, W. Kohler, W. Ebbinghaus","doi":"10.1109/EMCEUROPE.2012.6396742","DOIUrl":"https://doi.org/10.1109/EMCEUROPE.2012.6396742","url":null,"abstract":"Switching operations in the primary circuits of medium voltage switchgears are mostly attended by discharge processes in terms of pre- and restrikes between the switch contacts. Due to their high amplitudes as well as their steep wave fronts, such discharges are known to be very broadband and severe sources of electromagnetic disturbance. This contribution deals with the origin and the consequences of repetitively occurring electromagnetic disturbance pulses due to multiple restrikes at vacuum circuit breakers. On the basis of measurements at a special switchgear test setup, the impact of multiple restrikes at vacuum circuit breakers on the EMC of the switchgear installation is analyzed in time and frequency domain. Based on the results, the severity of multiple restrikes is estimated by comparing the disturbance values with conventional (well known) switching disturbances like during disconnector operations. Finally, some approaches for the handling of multiple restrikes at vacuum circuit breakers with respect to the EMC aspects are given in the summary.","PeriodicalId":377100,"journal":{"name":"International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133498545","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 : 2012-12-31DOI: 10.1109/EMCEUROPE.2012.6396923
M. Kowal, S. Kubal, P. Piotrowski, R. Zielinski
The main goal of this paper is an analysis of the vulnerability of radiocommunication systems operating in the 24-29GHz band against the interference from other systems operating in this band. Analysis was focused on Short Range Radars and Fixed Service. Short characteristic of both systems, calculation method, scenarios of interference and simulation results were shown.
{"title":"Compatibility study between short range radars and fixed service operating in 24GHz band — selected aspects","authors":"M. Kowal, S. Kubal, P. Piotrowski, R. Zielinski","doi":"10.1109/EMCEUROPE.2012.6396923","DOIUrl":"https://doi.org/10.1109/EMCEUROPE.2012.6396923","url":null,"abstract":"The main goal of this paper is an analysis of the vulnerability of radiocommunication systems operating in the 24-29GHz band against the interference from other systems operating in this band. Analysis was focused on Short Range Radars and Fixed Service. Short characteristic of both systems, calculation method, scenarios of interference and simulation results were shown.","PeriodicalId":377100,"journal":{"name":"International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"73 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133652201","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 : 2012-12-31DOI: 10.1109/EMCEUROPE.2012.6396791
P. Arcuti, G. Monti, L. Tarricone, L. Sileo, L. Martiradonna, M. De Vittorio
This paper presents a novel biotelemetry system based on a fully-passive architecture; High Electron Mobility Transistors are used as sensing elements. The main advantages and drawbacks related to the approach here proposed are deeply analyzed and some possible solutions identified. Furthermore, some preliminary experimental results are given and discussed.
{"title":"A novel biotelemetry system to monitor human vital signs","authors":"P. Arcuti, G. Monti, L. Tarricone, L. Sileo, L. Martiradonna, M. De Vittorio","doi":"10.1109/EMCEUROPE.2012.6396791","DOIUrl":"https://doi.org/10.1109/EMCEUROPE.2012.6396791","url":null,"abstract":"This paper presents a novel biotelemetry system based on a fully-passive architecture; High Electron Mobility Transistors are used as sensing elements. The main advantages and drawbacks related to the approach here proposed are deeply analyzed and some possible solutions identified. Furthermore, some preliminary experimental results are given and discussed.","PeriodicalId":377100,"journal":{"name":"International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133955276","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 : 2012-12-31DOI: 10.1109/EMCEUROPE.2012.6396817
S. Wielandt, D. Mercy, N. Stevens, L. De Strycker, Jean-Pierre Goemaere
When RFID reader antennas are placed in a parallel line configuration, proper shielding is indispensable to prevent the readout of tags in a different line. However, placing electrically conductive or magnetically permeable shielding materials in the vicinity of a loop antenna influences the magnetic field strength and self inductance of the antenna, thus affecting the readout range. This paper evaluates the effects of different shieldings on the magnetic field strength, the readout range of an RFID tag and the self inductance of the antenna. The considered shieldings consist of copper or a combination of copper with a layer of highly or lowly permeable ferrite on top. First, the influences of these materials are compared to a free space setup in FEM simulations. These results are subsequently verified in an experimental setup. The configuration with a copper plate covered with a highly permeable ferrite layer increases the magnetic field strength, readout range and self inductance of the antenna, in contrast to the other configurations. Due to the efficient shielding, erroneous readout events of tags in a parallel line are suppressed.
{"title":"Evaluation of shielding materials for low frequency RFID systems","authors":"S. Wielandt, D. Mercy, N. Stevens, L. De Strycker, Jean-Pierre Goemaere","doi":"10.1109/EMCEUROPE.2012.6396817","DOIUrl":"https://doi.org/10.1109/EMCEUROPE.2012.6396817","url":null,"abstract":"When RFID reader antennas are placed in a parallel line configuration, proper shielding is indispensable to prevent the readout of tags in a different line. However, placing electrically conductive or magnetically permeable shielding materials in the vicinity of a loop antenna influences the magnetic field strength and self inductance of the antenna, thus affecting the readout range. This paper evaluates the effects of different shieldings on the magnetic field strength, the readout range of an RFID tag and the self inductance of the antenna. The considered shieldings consist of copper or a combination of copper with a layer of highly or lowly permeable ferrite on top. First, the influences of these materials are compared to a free space setup in FEM simulations. These results are subsequently verified in an experimental setup. The configuration with a copper plate covered with a highly permeable ferrite layer increases the magnetic field strength, readout range and self inductance of the antenna, in contrast to the other configurations. Due to the efficient shielding, erroneous readout events of tags in a parallel line are suppressed.","PeriodicalId":377100,"journal":{"name":"International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131816429","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 : 2012-12-31DOI: 10.1109/EMCEUROPE.2012.6396727
T. Nakayama, D. Kitagawa, M. Ishii, Y. Saito
In the consumer electronics field, the clock frequency of the system LSI (large-scale integration) is increasing significantly. To maintain operational stability, the impedance of the power distribution network, especially in the high frequency range, has to be reduced. This results in increased number of power supply or ground pins for an LSI package. The increased pin count will require a larger LSI package leading to a cost increase. In order to reduce costs, the number and placement of the power supply pins and ground pins have to be optimized and hence, the current on each power supply pins and ground pin should be monitored. We are therefore developing a new probe using a printed circuit board with embedded parts to monitor the high frequency current of each pin in a ball grid array (BGA) package. In this paper, we report on the structure of the new probe and its high-frequency current measurement results.
{"title":"Proposal of a current measurement technique for each pin of a BGA package","authors":"T. Nakayama, D. Kitagawa, M. Ishii, Y. Saito","doi":"10.1109/EMCEUROPE.2012.6396727","DOIUrl":"https://doi.org/10.1109/EMCEUROPE.2012.6396727","url":null,"abstract":"In the consumer electronics field, the clock frequency of the system LSI (large-scale integration) is increasing significantly. To maintain operational stability, the impedance of the power distribution network, especially in the high frequency range, has to be reduced. This results in increased number of power supply or ground pins for an LSI package. The increased pin count will require a larger LSI package leading to a cost increase. In order to reduce costs, the number and placement of the power supply pins and ground pins have to be optimized and hence, the current on each power supply pins and ground pin should be monitored. We are therefore developing a new probe using a printed circuit board with embedded parts to monitor the high frequency current of each pin in a ball grid array (BGA) package. In this paper, we report on the structure of the new probe and its high-frequency current measurement results.","PeriodicalId":377100,"journal":{"name":"International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134184135","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 : 2012-12-31DOI: 10.1109/EMCEUROPE.2012.6396929
M. Nakayama, T. Kobayashi
A simple equation for calculating electric field strength has been widely used for electromagnetic applications. This equation has also been applied to the calibration of electric field probes, which has been specified in various standards, such as ISO/TR 10305-1, ISO/TR 10305-2, and IEEE Std. 1309. It is, however, valid only in the far field region. It is well known that the far field distance is given by λ/2π, where λ is the wavelength. This formula, however, gives a distance where the magnitudes of three terms - electrostatic, induction, and radiation fields - are equal. The lowest test frequency specified in ISO 11452-2 is 80 MHz (λ = 3.75 m) and the test distance is 1 m, which slightly exceeds λ/2π. The accuracy attained by the conventional equation deteriorates at this marginal distance. In this report, a new equation for calculating the electric field strength is proposed, embracing the effects of variations in space impedance. Numerical results yielded by the conventional and proposed equations were compared with the experimental data measured in a radio anechoic chamber. Substantial improvement in accuracy was achieved with the proposed equation.
{"title":"Electric field strength estimation in boundary region between near and far fields","authors":"M. Nakayama, T. Kobayashi","doi":"10.1109/EMCEUROPE.2012.6396929","DOIUrl":"https://doi.org/10.1109/EMCEUROPE.2012.6396929","url":null,"abstract":"A simple equation for calculating electric field strength has been widely used for electromagnetic applications. This equation has also been applied to the calibration of electric field probes, which has been specified in various standards, such as ISO/TR 10305-1, ISO/TR 10305-2, and IEEE Std. 1309. It is, however, valid only in the far field region. It is well known that the far field distance is given by λ/2π, where λ is the wavelength. This formula, however, gives a distance where the magnitudes of three terms - electrostatic, induction, and radiation fields - are equal. The lowest test frequency specified in ISO 11452-2 is 80 MHz (λ = 3.75 m) and the test distance is 1 m, which slightly exceeds λ/2π. The accuracy attained by the conventional equation deteriorates at this marginal distance. In this report, a new equation for calculating the electric field strength is proposed, embracing the effects of variations in space impedance. Numerical results yielded by the conventional and proposed equations were compared with the experimental data measured in a radio anechoic chamber. Substantial improvement in accuracy was achieved with the proposed equation.","PeriodicalId":377100,"journal":{"name":"International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134473606","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 : 2012-12-31DOI: 10.1109/EMCEUROPE.2012.6396684
S. Kubal, M. Kowal, P. Zieliński
This paper presents a preliminary analysis of the scattering effects of the radio waves caused by reflections from irregular surface. As a main tool of the analysis the geometrical optics (GO) has been chosen. GO was described in the introduction. The model of surface used for simulation and results of analysis of different cases are presented as well.
{"title":"Radiation characteristics of simple irregular surface","authors":"S. Kubal, M. Kowal, P. Zieliński","doi":"10.1109/EMCEUROPE.2012.6396684","DOIUrl":"https://doi.org/10.1109/EMCEUROPE.2012.6396684","url":null,"abstract":"This paper presents a preliminary analysis of the scattering effects of the radio waves caused by reflections from irregular surface. As a main tool of the analysis the geometrical optics (GO) has been chosen. GO was described in the introduction. The model of surface used for simulation and results of analysis of different cases are presented as well.","PeriodicalId":377100,"journal":{"name":"International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115651195","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 : 2012-12-31DOI: 10.1109/EMCEUROPE.2012.6396770
W. Radasky, R. Hoad
Throughout the world there are plans to enhance the operation of electricity power networks to deal with the introduction of distributed and renewable power systems. The basic approach is to provide a new communications system to monitor and control future power networks (Smart Grid). Unfortunately electromagnetic disturbances such as those associated with typical electromagnetic interference (EMI) can cause problems with the operation of modern electronics. In addition a set of high power EM threats are of even greater concern, although the probability of occurrence for each threat is low. This paper introduces these three HPEM threats and describes the possible impacts on electronics within electricity networks of the future, if they are not protected before being placed in service.
{"title":"An overview of the impacts of three high power electromagnetic (HPEM) threats on Smart Grids","authors":"W. Radasky, R. Hoad","doi":"10.1109/EMCEUROPE.2012.6396770","DOIUrl":"https://doi.org/10.1109/EMCEUROPE.2012.6396770","url":null,"abstract":"Throughout the world there are plans to enhance the operation of electricity power networks to deal with the introduction of distributed and renewable power systems. The basic approach is to provide a new communications system to monitor and control future power networks (Smart Grid). Unfortunately electromagnetic disturbances such as those associated with typical electromagnetic interference (EMI) can cause problems with the operation of modern electronics. In addition a set of high power EM threats are of even greater concern, although the probability of occurrence for each threat is low. This paper introduces these three HPEM threats and describes the possible impacts on electronics within electricity networks of the future, if they are not protected before being placed in service.","PeriodicalId":377100,"journal":{"name":"International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114408366","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 : 2012-12-31DOI: 10.1109/EMCEUROPE.2012.6396871
Nishimoto Taiki, Rikiya Asai, T. Matsushima, T. Hisakado, O. Wada
When an LSI package is mounted on a PCB, parasitic couplings are unintentionally generated between them. Antiresonance of these couplings (package-common-mode resonance) can cause degradation of signal and power integrity. In this paper, the authors experimentally verified the package-common-mode resonance by comparing scattering parameters with variation of CMOS output jitter. In order to suppress increase of the jitter, resister-dumping method was tested as a countermeasure.
{"title":"Experimental verification of signal integrity deterioration due to package-common-mode resonance","authors":"Nishimoto Taiki, Rikiya Asai, T. Matsushima, T. Hisakado, O. Wada","doi":"10.1109/EMCEUROPE.2012.6396871","DOIUrl":"https://doi.org/10.1109/EMCEUROPE.2012.6396871","url":null,"abstract":"When an LSI package is mounted on a PCB, parasitic couplings are unintentionally generated between them. Antiresonance of these couplings (package-common-mode resonance) can cause degradation of signal and power integrity. In this paper, the authors experimentally verified the package-common-mode resonance by comparing scattering parameters with variation of CMOS output jitter. In order to suppress increase of the jitter, resister-dumping method was tested as a countermeasure.","PeriodicalId":377100,"journal":{"name":"International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123342573","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 : 2012-12-31DOI: 10.1109/EMCEUROPE.2012.6396779
S. Khedimallah, B. Nekhoul, K. Kerroum, K. El Khamlichi Drissi
The Power Line Communications (PLC) are often used in the data transmission for the management in the power transport network. Also since a few years the PLC uses the distribution network to transmit data (Internet, television cable, house automation ...) among customers. In this work we are interested in calculation of the electromagnetic field emitted by the PLC network taking into account the power transformer. To realize this work we use the concept of Schelkunoff allowing to calculate the electromagnetic field emitted by an antenna located in a free space traversed by a current in the presence of the propagation. To validate our work we confront our calculation results with those obtained by the NEC-4 software which uses the antennas theory then, we propose some applications.
电力线通信(Power Line Communications, PLC)是电力输送网络管理中常用的数据传输设备。几年来，PLC使用配电网在客户之间传输数据(互联网、电视电缆、家庭自动化……)。在这项工作中，我们感兴趣的是在考虑电力变压器的情况下计算PLC网络发出的电磁场。为了实现这项工作，我们使用舍尔库诺夫允许的概念来计算由位于自由空间的天线发出的电磁场，该天线在存在传播的情况下被电流穿过。为了验证我们的工作，我们将计算结果与使用天线理论的NEC-4软件的计算结果进行了比较，并提出了一些应用。
{"title":"Analysis of Power Line Communications electromagnetic field in electrical networks taking into account the power transformers","authors":"S. Khedimallah, B. Nekhoul, K. Kerroum, K. El Khamlichi Drissi","doi":"10.1109/EMCEUROPE.2012.6396779","DOIUrl":"https://doi.org/10.1109/EMCEUROPE.2012.6396779","url":null,"abstract":"The Power Line Communications (PLC) are often used in the data transmission for the management in the power transport network. Also since a few years the PLC uses the distribution network to transmit data (Internet, television cable, house automation ...) among customers. In this work we are interested in calculation of the electromagnetic field emitted by the PLC network taking into account the power transformer. To realize this work we use the concept of Schelkunoff allowing to calculate the electromagnetic field emitted by an antenna located in a free space traversed by a current in the presence of the propagation. To validate our work we confront our calculation results with those obtained by the NEC-4 software which uses the antennas theory then, we propose some applications.","PeriodicalId":377100,"journal":{"name":"International Symposium on Electromagnetic Compatibility - EMC EUROPE","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123609979","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：