2007 ieee international symposium on electromagnetic compatibility

40EMC <strong>2007</strong> ADVANCE PROGRAMStephen Gedney, University of Kentucky; Chong Luo, University ofKentucky; Bryan Guernsey, University of Kentucky; J. Alan Roden,Aerospace Corporation; Robert Crawford, Aerospace Corporation; JeffreyMiller, Aerospace Corporation; and Stephen Gedney, University of KentuckyA discontinuous Galerkin Finite-Element Time-Domain method is presented.The method is based on a high order finite element discretizationof Maxwell’s time-dependent curl equations. The global volume isdecomposed into contiguous sub-domains of finite-elements with independentfunction expansions. The fields are coupled across sub-domainboundaries by enforcing the tangential field continuity. This leads to alocally implicit, globally explicit difference operator that provides anefficient high-order, accurate, time-dependent solution.An Efficient Implementation of Parallel FDTDXiaohe Chen; Michael Cracraft; Yaojiang Zhang; Jianmin Zhang; andJames Drewniak, — University of Missouri-Rolla; Bruce Archambeault,IBM Corporation; Samuel Connor, IBM CorporationA parallel FDTD algorithm has been realized based on 1-D domaindecomposition. Data communication among different adjacent processorsis manipulated by a self-defined C++ class, MPI FDTD, in whichportable functions of the message passing interface (MPI) library areused. The details of the implementation are discussed. EMC applicationsof the code such as cross talk of traces, cavity, vias, as well as anIC package are provided to demonstrate the parallel efficiency.POSTER SESSION 01: SYSTEM EMCEMC Management in a High Power Pulse LaserJoel Raimbourg, CEAThe Ligne d’Integration Laser (LIL) is the biggest European laser facility.The plant is a 150 by 80 meter building which includes 8 highpower lasers and a target chamber for experiments. We need to stock20 Mjoules in capacity banks and commute 250 kA to feed the laserbeams. The 60 kJ of light power are concentrated on one target forphysics experiments. This generates electromagnetic pulses with levelsof up to 10 kV/m and frequencies up to 3 GHz. Many electromagneticvictims (such as laser beam diagnostic detectors) need to functionunder serious interference conditions. This paper gives an overview ofthe electromagnetic compatibility management of this project. One ofthe principal difficulties is the single shot aspect of the process. Allelectromagnetic victims must work under normal conditions duringthe experiment. A temporary dysfunction is not permitted in our case.EMI Sub-System Level Emission Limits Based on StatisticAnalysisQin Yu; and Zijue Zhang, — Alcatel-LucentProduct EMI pre-compliance evaluation becomes more importantnowadays than before due to the growing industrial trend in outsourcingOEM. Precompliance testing involves measuring the radiatedand power port conducted emissions of a complex system at theunit, shelf and/or sub-system levels. Defining the appropriate EMIlimits at the sub-system level is crucial for the compliance of theoverall system. The suppliers rely on the product specifications todesign their products. If the sub-system level limit specified is tooconservative, the product would be over designed and the cost wouldgo up. However, if the sub-system level limit specified is too loose,the system EMI compliance will be in jeopardy. This paper utilizedthe statistical modeling recommended by ITU to estimate the maximumincrease in the radiated and power-line conducted emissionsfrom a multi-unit system. The results are useful in determiningappropriate product sub-system level EMI limits and enhancingengineering judgment for compliance evaluation. The sub-systemlevel limits based on the statistical analysis provide plausible andrational criteria for sub-system level compliance evaluation and preventthe product from being over-designed.Development of Apparatus for Measuring ElectromagneticShielding Effectiveness at the GHz Frequency BandJong-Hwa Kwon, ETRI; Jae Ick Choi, ETRI; and Jong Gwan Yook, YonseiUniversityWe have designed and manufactured a flanged double ridged waveguideas a sample holder for measuring the electromagnetic shieldingeffectiveness (SE) of planar material in broadband frequency rangesup to 10 GHz. The newly proposed sample holder in this paper hasa tapered section for broadband impedance matching to the 50 ohmcoaxial feed section. And we compared the measurement results withthe simulation results by using the commercial software tool. Theresults from the designed sample holder agree well with those fromthe fabricated ones when considering the design specification of S11< -20 dB at the operational frequency range. Also, to verify themeasuring apparatus, we have tried to measure and compare the SEsof commercial shielding material made of 100% NiC by the proposedsample holder and ASTM D4935 holder.Analysis of the Shielding Effectiveness of a RectangularCavity with Apertures to an ESD Radiated Field by theTransmission Line MethodLiuping Wang; and Yougang Gao, — Beijing University of Posts andTelecommunicationsIn this article, we first analyze the characteristics of an electrostaticdischarge (ESD) electromagnetic pulse (EMP) and introduce the basictheory of the transmission line method (TLM), which is used to analyzethe shielding effectiveness of rectangular enclosures with apertures.The calculations show that the TML shielding efficiency contoursare in agreement with the FDTD calculated results. Then weexpand the fundamental formulas to deal with the cases of roundholes, multi-holes, and arbitrary angles of polarization.Distribution and Characteristic of the Disturbances in theDriving System of a Fuel Cell BusBo Zhang; Jinliang He; Shaofeng Yu; Wei Li; Rong Zeng; and YongHuang, — Tsinghua University; Jae-bok Lee; and Sug-hun Chang, —Korea Electrotechnology Research InstituteThis paper analyzes the distribution and the characteristic of the disturbancesin the driving system of a fuel cell bus by measuring boththe conductive and radiative emissions. A statistical method wasused to investigate the parameters of the typical voltage waveforms,which were compared with the standard ones in ISO7637-2. Theresults are useful for the further investigation of the EMC problemsin the fuel cell bus.Electromagnetic Cross Coupling between Ground SupportPower Lines and Spacecraft Umbilical CablesJ. Chai, The Aerospace Corporation; E. Dressel, N/A; and D. Taylor, N/AThe transients recorded by the hybrid On-line Lightning MonitoringSystem (OLMS) led to the investigation of the electromagnetic crosscoupling between the ground support power lines and spacecraftumbilical cables. It was discovered that the associated Power-Onevents had sufficient temporal association and amplitude correlationto cause the recorded transients, and some recommendations weremade to further address the issue.©<strong>2007</strong> IEEE www.emc<strong>2007</strong>.org