2007 ieee international symposium on electromagnetic compatibility

34EMC <strong>2007</strong> ADVANCE PROGRAM(SA) and specific absorption rate (SAR) calculation. We demonstratedthat the two approaches have the same accuracy but the timedomainapproach is more straightforward in the numerical analysis.We also showed some SA/SAR calculation results for a UWB pulseexposure to an anatomical human body model.BIOLOGICAL EFFECTSEnabling the Use of Broadband Tissue Equivalent Liquidsfor Specific Absorption Rate MeasurementsMark Douglas; and Chung-Kwang Chou, — Motorola LabsThe aim of this study is to determine a robust prediction algorithmfor the change in SAR due to deviations in the complex permittivityof a homogeneous phantom from standardized reference values.Several antenna sizes and distances to the phantom are investigatedso as to study a large range of SAR distributions. Simulations usingthe Moment Method are presented. Results are analyzed over a frequencyrange of 30 to 6000 MHz. It is demonstrated that the predictionalgorithm, while developed using dipole antennas, worksequally well for realistic wireless devices. Employing the predictionalgorithm reduces the SAR measurement uncertainty due to permittivitychanges, thereby improving the reproducibility of SAR complianceassessment between laboratories. Another benefit of the algorithmis that it enables SAR measurement standards committees torelax their tolerances on the complex permittivity from defined targets,which allows for the use of broadband tissue equivalent liquids,thus reducing the cost of SAR measurement. The method presentedin this paper has been adopted for inclusion in the next revisions ofthe IEEE 1528 and IEC 62209 measurement standards.Electromagnetic Field Radiation of Mobile Phone Inside aMetallic EnclsoureC. K. Tang; W. K. Lam; K. H. Chan; L. C. Fung; S. W. Leung; and Y.M. Siu, — City University of Hong KongA numerical study on the electromagnetic (EM) field radiation of amobile phone inside a metallic enclosure, from the human safetyaspect, is presented in this paper. The study on the effects of a numberof human bodies and their positions inside the metallic enclosureon the induced E-field was carried out. Results have shown that theE-field induced on the human head of a mobile phone user is not sensitiveto the loadings of human bodies inside the metallic enclosure.However, the E-field induced away from the mobile phone user thatcontributes to the E-field exposure of other people nearby is significantlychanged for different human capacities inside the metallicenclosure. Results have also indicated that the E-field induced on thehuman head of a mobile phone user would be increased by 34% whenother people using mobile phones are in proximity to the conductingwalls of the metallic enclosure.Inter-Laboratory Comparison Results of the ProficiencyTesting Program of EMI Test Sites in JapanKunihiro Osabe, Voluntary EMC Laboratory Accreditation Center, Inc.Recently, an inter-laboratory comparison of the proficiency testingprogram based on the ISO/IEC Guide 43-1 was performed at EMItest sites in Japan by VLAC (Voluntary EMC LaboratoryAccreditation Center Inc.), the Japanese Accreditation Body for EMCtest laboratories. A comb generator operated by AC mains was usedfor the artifact, since the technical proficiency of EMI measurementcannot be evaluated unless both of the conducted emissions and theradiated emissions are measured among the EMI test laboratories.This program, therefore, was performed to measure the conductedemission noise from the switching regulator incorporated into thepower supply circuit of the artifact, and to measure the radiated noiseemitted from the comb generator itself through the enclosure and ACmains cable. For the radiated emissions measurements, the artifactwas connected through the VHF-Line Impedance StabilizationNetwork (LISN) to the supply and the AC mains. That is, the commonmode impedance of of the mains power supply was specified toall participating test sites for the radiated emissions measurements.As a result of this program, the distribution width of the collecteddata from the group was kept from 6 dB to 10 dB, therefore it waseasy to find the laboratory which had isolated data from the group.Testing Large Industrial Systems, Preparations andTechniquesKenneth Boston, L S Research LLCThe success of EMC tests of large systems, machines which cannot beaccommodated within the typical EMC laboratory environment,depends on several factors, which will require careful planning in theinitial stages of the project. Several of the issues surrounding theplanning, staging, and testing of these types of systems will be discussed,and various observations and conclusions reached throughstudy and experience will be presented. Some of these issues are regulatory,and some are technical in nature. With the current EMCdirective being replaced in the summer of <strong>2007</strong>, the regulatory environmentfor most of these systems will also be changing.PRINTED CIRCUIT BOARD MODELINGThe Effects of Signal Trace’s Termination on GroundBounce and Common-Mode RadiationEng Kee Chua, Institute of High Performance Computing; Kye Yak See,Nanyang Technological University; Weng Yew Chang, Nanyang TechnologicalUniversity; and Er Ping Li, Institute of High Performance ComputingBased on the Method of Moments (MoM), the ground bounce on anyarbitrary printed circuit structure as well as the common mode currenton any conductor that attached to the printed circuit structure arepredicted. The MoM is applied to obtain the impedance matrix,which could be used to determine the unknown current vector as wellas the inductance matrix. With the inductance matrix and currentvector, the potential difference between any two adjacent nodes is predicted.The effects of the signal trace’s termination on ground bounceand common-mode radiation are discussed through numerical results.Capacitance of an Open Circuit Via PortFranz Schlagenhaufer; and Matthew Wood, — The University of WesternAustraliaThe via capacitance as part of a power plane structure is defined andcalculated using a series expansion for the electrostatic field. Then bychoosing a suitable surface surrounding the via, Gauss’s Law isapplied to obtain a numerically stable expression for the capacitance,written in series form. Attention is paid to the influence of dimensionsand material on the capacitance value, and comparisons withMethod-of-Moment based simulation packages are made.Coupling Analysis of PCB-Chassis Systems with SignalLines and Via Structures Using SPICENaoki Kobayashi, NEC Jisso and Production Technologies ResearchLaboratories; Todd Hubing, Clemson University; Ken Morishita; ManabuKusumoto; and Takashi Harada, — Jisso and Production TechnologiesResearch LaboratoriesThis paper describes the SPICE modeling of printed circuit boards(PCBs) with signal lines and via structures electrically connected to a©<strong>2007</strong> IEEE www.emc<strong>2007</strong>.org