1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)最新文献

{"title":"Effects of ferrite sheet attachment to portable telephone in reducing electromagnetic absorption in human head","authors":"Jianqing Wang, O. Fujiwara, T. Takagi","doi":"10.1109/ISEMC.1999.810126","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810126","url":null,"abstract":"In order to reduce the spatial peak specific absorption rate (SAR) in a human head due to a portable telephone, we have proposed attaching a ferrite sheet to the portable telephone. In this paper, the mechanism of SAR reduction is reviewed and then the effects of the attachment location and size, and the material properties of ferrite sheet on the SAR reduction are investigated by using the finite-difference time-domain (FDTD) method in conjunction with a detailed human head model. Their effects on the antenna radiation efficiency are also given. The results lead to a guide to choosing and designing a ferrite sheet with the maximum SAR reducing effect for portable telephones.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128918977","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}

{"title":"A simulation of \"Class A\" noise by P-CNG","authors":"H. Inoue, K. Sasajima, M. Tanaka","doi":"10.1109/ISEMC.1999.812960","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.812960","url":null,"abstract":"Using a programmable composite noise generator (P-CNG) which have been developing by the authors, Middleton's (1977) \"Class A\" noise is simulated. It is mentioned also what we should take care of if we use the P-CNG for immunity tests. The setting method of A and /spl Gamma/' which are the parameters of the \"Class A\" noise is shown. The time-based amplitude probability distributions (APD) of the P-CNG output are measured. As a result, it was found that the time-based APD is coincident with the setting and experiment value of the \"Class A\" noise.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122007495","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}

{"title":"Power density spectrum estimation of the random controlled PWM single-phase boost rectifier","authors":"F. Mihalič, M. Milanovič","doi":"10.1109/ISEMC.1999.810122","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810122","url":null,"abstract":"Random modulation is of increasing interest in power electronics and also holds promise for reducing filtering requirements in AC/AC, DC/DC converter applications and reducing acoustic noise in motor drive applications. This paper deals with the power spectrum density (PSD) estimation methods of the random controlled pulse width modulation (RPWM) single-phase structured boost rectifier. Estimated PSD is also experimentally verified. The switch-mode operation of the converter results in electromagnetic interference (EMI) which is produced due to large di/dt and dv/dt. In addition to all steps to minimize the generation of EMI (i.e. introduction of RPWM), improvement of power spectra is also considered.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124028781","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}

{"title":"Coupling of PEEC models with transmission line models for simulation of wiring structures","authors":"G. Wollenberg, A. Gorisch","doi":"10.1109/ISEMC.1999.810131","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810131","url":null,"abstract":"In order to reduce the cost for the creation and simulation of partial element equivalent circuit (PEEC) models it is beneficial to describe sections, that fulfil the requirements for the transmission line equations (2D models) with transmission line (TL) models and couple them to the pure 3D PEEC models for the other parts. In this paper the coupling of PEEC models to the homogeneous TL model is demonstrated. Different discontinuities and nonuniformities are studied.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122251659","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}

{"title":"Measurement of emissions and immunity on telecommunication lines-a universal ISN concept for unshielded cables","authors":"M. Stecher","doi":"10.1109/ISEMC.1999.810102","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810102","url":null,"abstract":"The new editions of CISPR 22/EN 55022 as well as CISPR 24/EN 55024 require testing of emission and immunity on telecommunication ports of information technology equipment (ITE) and telecommunication equipment. Different versions of impedance stabilization networks (ISNs) are required for the different conformance alternatives and cable categories. Since there is a great variety of systems with different pin connections of the Western RJ45 connector, a solution with a basic universal network using a universal interface and a series of adapters has been chosen. A high-performance balun has been developed for verification and calibration. Imperfections of the CISPR 22 standard are discussed together with characteristics and proposed amendments of CISPR 16-1 for ISN characterization and calibration.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130471451","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}

{"title":"EMI from an automotive CAN bus","authors":"F. Silva, M. Quílez, J. Llop, X. Torres, P. Riu","doi":"10.1109/ISEMC.1999.812958","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.812958","url":null,"abstract":"Electromagnetic radiated emissions from an automotive CAN bus are analyzed. This type of subsystems can produce interference's on electronic components or submodules, including radio receptors. Measurements inside and outside the car are performed. The control of the differential signal slope results in an easy way to reduce EMI at high frequencies. Finally, a set of near field measurements inside the car is presented.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134088774","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}

{"title":"Analysis on loop area trace radiated emissions from decoupling capacitor placement on printed circuit boards","authors":"M. Montrose","doi":"10.1109/ISEMC.1999.812941","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.812941","url":null,"abstract":"This paper presents, with a solid conclusion, practical, hands-on applied EMC information for engineers that can be put to immediate use without relying on the mathematics of Maxwell's equations. An examination is made to determine if the physical placement of decoupling capacitors makes a significant difference in the development and propagation of radiated emissions from a printed circuit board (PCB) when used with actual, high-speed components. The focus is on what happens on both the top and bottom layers of a PCB, regardless of whether the board is single-sided, double-sided or multilayer. This paper complements existing research that investigates decoupling using simulation. Correlation between simulation and actual results is supported in this paper. A problem with simulation is that results calculated sometimes cannot take into consideration common-mode RF energy developed by components switching multiple outputs under maximum capacitive load, consuming a large amount of inrush current or impulse currents from switching cross-conduction. Common-mode energy cannot always be efficiently simulated at this time, thus causing the possibility of inaccurate assumptions regarding anticipated radiated emissions from a PCB layout. Behavioral models used for simulation are usually (theoretically) perfect and may not represent actual design parameters due to parasitics and other electromagnetic effects that cannot be easily calculated or anticipated. RF energy is developed due to digital components switching logic states. A voltage gradient on the power and ground planes between components causes common-mode EMI to be observed on interconnects and other radiating structures. Decoupling capacitors are provided to minimize voltage gradients, along with minimizing RF switching energy injected into the power distribution network and distributed throughout the entire PCB. The magnitude of radiated energy, related to decoupling capacitors is investigated in this paper, based on the physical location to digital components. In addition, common engineering problems in determining an optimal decoupling capacitor value are presented, with regard to both time and frequency domain analysis.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128674514","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}

{"title":"A comparison of radiated emissions testing to European Directive 95/54/EC using an open field test site and a semi-anechoic chamber","authors":"P. Miller","doi":"10.1109/ISEMC.1999.810119","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810119","url":null,"abstract":"Most automotive component level testing, and in particular European Directive 95/54 requires that under some (in practice most) conditions radiated emissions measurements from electrical/electronic sub-assemblies (ESAs) are made with the ESA under test mounted on an elevated ground plane 1 m high on a wooden table. It is shown that how this ground plane is connected to the test sites ground is very important, and that this is in fact a key issue in obtaining correlation between different open field sites and also in obtaining correlation to test results obtained in a semi-anechoic chamber.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"35 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116389088","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}

{"title":"Modeling and simulation validation for EMC applications","authors":"B. Archambeault","doi":"10.1109/ISEMC.1999.812954","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.812954","url":null,"abstract":"Modeling and simulation tools are very valuable as design and analysis tools to help in EMC engineering problems. As with any tool, they only provide accurate results when used properly. It is not always practical to use measurements to validate simulation results. Intermediate results from various modeling techniques can be used to help validate specific models, and increase confidence in the final results.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114526533","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}

{"title":"Application of the method of moments (MoM) to a challenging real-world EMC problem","authors":"H.-D. Brums, H. Singer, M. Leone","doi":"10.1109/ISEMC.1999.810100","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.810100","url":null,"abstract":"The method of moments (MoM) was applied to two problems defined for the valuation of different common numerical modeling techniques that are used in the area of EMC. The fundamentals of the theory is repeated. It is shown that for the examples considered only the electric field integral equation (EFIE) is sufficient.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"109 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115162910","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}