2015 IEEE International Symposium on Electromagnetic Compatibility (EMC)最新文献

On measurement of reverberation chamber time constant and related curve fitting techniques 混响室时间常数的测量及曲线拟合技术

2015 IEEE International Symposium on Electromagnetic Compatibility (EMC) Pub Date : 2015-09-14 DOI: 10.1109/ISEMC.2015.7256196

Xiaotian Zhang, M. Robinson, I. Flintoft

{"title":"On measurement of reverberation chamber time constant and related curve fitting techniques","authors":"Xiaotian Zhang, M. Robinson, I. Flintoft","doi":"10.1109/ISEMC.2015.7256196","DOIUrl":"https://doi.org/10.1109/ISEMC.2015.7256196","url":null,"abstract":"The reverberation chamber time constant quantifies how fast a reverberation chamber loses its stored energy at different frequencies, which makes it a very important parameter in many power related tests, such as the measurement of antenna efficiency, the measurement of absorption cross section, and the electromagnetic immunity test of electronic devices. The chamber time constant is usually obtained by doing regressions of power delay profile and calculating its gradient. But the shape of power delay profile can sometimes be distorted by the band limited window function applied in the frequency domain. A non-linear curve fitting technique which can cancel the effect of window function was developed, aiming to give a robust determination of the chamber time constant. With the help of this technique, window functions with much smaller bandwidth can be applied without introducing error in the evaluation of chamber time constant. In this paper, a 1 MHz wide window function in which only 10 samples of S21 are available was put under test and it was found a robust answer of chamber time constant can still be given by non-linear curve fitting techniques. Therefore the measurement time can be reduced and the frequency resolution of the chamber time constant can be increased at the same time.","PeriodicalId":412708,"journal":{"name":"2015 IEEE International Symposium on Electromagnetic Compatibility (EMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115381404","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: 12

Increased EMI immunity in CMOS operational amplifiers using an integrated common-mode cancellation circuit 利用集成共模抵消电路提高CMOS运算放大器的抗电磁干扰能力

2015 IEEE International Symposium on Electromagnetic Compatibility (EMC) Pub Date : 2015-09-14 DOI: 10.1109/ISEMC.2015.7256128

Marco Grassi, Jean-Michel Redouté, A. Richelli

引用次数: 10

A fuzzy approach for IEMI risk analysis of IT-Systems with respect to transient disturbances 基于暂态扰动的it系统IEMI风险模糊分析方法

2015 IEEE International Symposium on Electromagnetic Compatibility (EMC) Pub Date : 2015-09-14 DOI: 10.1109/ISEMC.2015.7256318

T. Peikert, H. Garbe, S. Potthast

引用次数: 7

ESD performance evaluation of powered high-speed interfaces 供电高速接口的ESD性能评估

2015 IEEE International Symposium on Electromagnetic Compatibility (EMC) Pub Date : 2015-09-14 DOI: 10.1109/ISEMC.2015.7256322

Sebastian Koch, H. Gossner, H. Gieser, L. Maurer

引用次数: 3

Extension of the emission measurements for alternative test methods above 1 GHz for unintentional electromagnetic radiators 非故意电磁辐射器1 GHz以上替代测试方法发射测量的扩展

2015 IEEE International Symposium on Electromagnetic Compatibility (EMC) Pub Date : 2015-09-14 DOI: 10.1109/ISEMC.2015.7256203

B. Menssen, D. Hamann, H. Garbe

{"title":"Extension of the emission measurements for alternative test methods above 1 GHz for unintentional electromagnetic radiators","authors":"B. Menssen, D. Hamann, H. Garbe","doi":"10.1109/ISEMC.2015.7256203","DOIUrl":"https://doi.org/10.1109/ISEMC.2015.7256203","url":null,"abstract":"The standards by CISPR and IEC describe different procedures for the measurement of the radiated disturbance of electronic equipment. However, these standards only account for measuring the maximum radiated electric field strength for a specified number of sampling points. This leads to the assumption that especially for the characteristics of unintentional electromagnetic radiators, the specified amount of sampling points is not sufficient so that the true maximum of the electric field strength might be undetermined. Therefore, stochastic approaches were derived to predict the maximum radiated electric field strength based on the total radiated power. Above 1 GHz and without using a reverberation chamber, the determination of the total radiated power is very time consuming. Hence, a new approach is presented in this paper which uses standardized sampling approaches from alternative test methods to predict the maximum radiated electric field strength from a reduced number of angles of observation. Its accuracy and applicability as an extension for the emission measurements of unintentional electromagnetic radiators is assessed.","PeriodicalId":412708,"journal":{"name":"2015 IEEE International Symposium on Electromagnetic Compatibility (EMC)","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122935099","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

Finite element simulation of the frequency-dependent polarization of biological cells 生物细胞频率相关极化的有限元模拟

2015 IEEE International Symposium on Electromagnetic Compatibility (EMC) Pub Date : 2015-09-14 DOI: 10.1109/ISEMC.2015.7256219

Sebastian Bohmelt, Fabian Scharf, M. Dudzinski, M. Rozgic, L. Fichte, M. Stiemer

{"title":"Finite element simulation of the frequency-dependent polarization of biological cells","authors":"Sebastian Bohmelt, Fabian Scharf, M. Dudzinski, M. Rozgic, L. Fichte, M. Stiemer","doi":"10.1109/ISEMC.2015.7256219","DOIUrl":"https://doi.org/10.1109/ISEMC.2015.7256219","url":null,"abstract":"The impact of electromagnetic fields on biological tissue is increasingly gaining relevance for electromagnetic compatibility considerations. To estimate such effects, the determination of the electromagnetic exposition on the cellular level is essential. Hence, a new method for the finite element simulation of biological cells in electrolyte solution based on the electro-quasistatic approximation to Maxwell's equations is presented here. By non-overlapping iterative domain decomposition (IDD), a more efficient and accurate incorporation of surface charge relaxation on material interfaces is achieved than by former methods. IDD does not only lead to an efficient consideration of the interface coupling of electrical flux- and current densities, but also overcomes numerical problems related to size differences of individual cell components. A completely parallel treatment of the resulting subdomains will enable the simulation of large cell systems in the future. The approach is validated in the case of a time-harmonic external field. Further, numerical errors and convergence properties are analyzed.","PeriodicalId":412708,"journal":{"name":"2015 IEEE International Symposium on Electromagnetic Compatibility (EMC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114263547","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

Mode conversion and transfer characteristics of conducted disturbance to Ethernet device from power supply cable 供电电缆传导扰动对以太网设备的模式转换及传输特性

2015 IEEE International Symposium on Electromagnetic Compatibility (EMC) Pub Date : 2015-09-14 DOI: 10.1109/ISEMC.2015.7256190

T. Matsushima, O. Wada, K. Takaya, Y. Okugawa

引用次数: 1

Investigations on the shaft currents of an electric vehicle traction system in dynamic operation 电动汽车牵引系统动态运行时轴电流的研究

2015 IEEE International Symposium on Electromagnetic Compatibility (EMC) Pub Date : 2015-09-14 DOI: 10.1109/ISEMC.2015.7256248

S. Jeschke, S. Tsiapenko, H. Hirsch

{"title":"Investigations on the shaft currents of an electric vehicle traction system in dynamic operation","authors":"S. Jeschke, S. Tsiapenko, H. Hirsch","doi":"10.1109/ISEMC.2015.7256248","DOIUrl":"https://doi.org/10.1109/ISEMC.2015.7256248","url":null,"abstract":"As a result of the power train electrification in electric and hybrid vehicles the electromagnetic compatibility of these vehicles is comprehensively affected. To ensure the electromagnetic compatibility of these vehicles the traction system is built up completely shielded and isolated from the vehicle chassis. Considering the shielding of the propulsion system the shaft of the traction drive represents a weak point. Due to stray capacitances of the drive's bearings the high frequent portions of the stator current can couple onto the shaft. These currents can flow through the gear box in direction of the wheels and possibly affect sensors of the 12V system. For EMC testing on component level, normally the common mode current on the cables between the inverter and the drive and between the inverter and the propulsion battery is considered. For the disturbances occurring on the battery cables alternatively the unsymmetrical voltage is measured using a high voltage coupling network. Considering the actual standard, a measurement of the shaft currents is actually not provided. Another point is that the measurements are normally tested in constant operating points, not representing the typical operation of a vehicle. Thus in this paper the shaft currents occurring in the traction system of an electric vehicle are investigated for constant and dynamic operation. For the investigation, a Hardware in the Loop (HiL) setup of an electric vehicle traction system with the ability to variably simulate dynamic drive scenarios is used. For the detection of the shaft currents, an inductive measurement transducer is used. The occurring EMI are measured using a Time Domain EMI Measurement system to analyze the EMI behavior and to indentify critical operating points during the dynamic operation of an electric vehicle.","PeriodicalId":412708,"journal":{"name":"2015 IEEE International Symposium on Electromagnetic Compatibility (EMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129937920","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: 8

Determination of radiated emissions of an electrically large EUT: Simulation and experiment 电大型EUT辐射发射的测定:模拟和实验

2015 IEEE International Symposium on Electromagnetic Compatibility (EMC) Pub Date : 2015-09-14 DOI: 10.1109/ISEMC.2015.7256175

Xiaowei Wang, R. Vick

引用次数: 6

Optimal terahertz shielding performances of flexible multilayer screens based on chemically doped graphene on polymer substrate 基于化学掺杂石墨烯的聚合物衬底柔性多层屏的最佳太赫兹屏蔽性能

2015 IEEE International Symposium on Electromagnetic Compatibility (EMC) Pub Date : 2015-09-14 DOI: 10.1109/ISEMC.2015.7256309

A. D’Aloia, M. D'amore, M. S. Sarto

{"title":"Optimal terahertz shielding performances of flexible multilayer screens based on chemically doped graphene on polymer substrate","authors":"A. D’Aloia, M. D'amore, M. S. Sarto","doi":"10.1109/ISEMC.2015.7256309","DOIUrl":"https://doi.org/10.1109/ISEMC.2015.7256309","url":null,"abstract":"The shielding performances of multilayer screens made of laminated graphene sheets with flexible polymeric interlayer depend on several factors such as thickness of the polymer interlayers, number of laminated graphene sheets, electron transport properties of graphene, and frequency range. Previous studies have highlighted that the frequency dependent graphene conductivity is a function of the charge carrier density, mobility and quantum scattering time, and it is strongly affected by doping and fabrication route. This paper is aimed at the analysis of the shielding performances of laminated graphene/polymer multilayers at terahertz, in order to provide insights on the optimum shield design as a function of frequency. The proposed simulation model accounts for the frequency dispersive properties of the graphene monolayer and of the polyethylene terephthalate (PET), which is considered as flexible polymeric interlayer material. The optimal choice of the substrate thickness is discussed in order to achieve the maximum value of the shielding effectiveness (SE) in the terahertz frequency range. The proposed design procedure is applied to three multilayer shield configurations, which are made of different types of chemically doped graphene. The computed frequency spectra of the shielding effectiveness up to 10 THz highlight the shielding performances of the considered samples.","PeriodicalId":412708,"journal":{"name":"2015 IEEE International Symposium on Electromagnetic Compatibility (EMC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128805846","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: 13