2007 ieee international symposium on electromagnetic compatibility
2007 ieee international symposium on electromagnetic compatibility
2007 ieee international symposium on electromagnetic compatibility
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10EMC <str<strong>on</strong>g>2007</str<strong>on</strong>g> ADVANCE PROGRAMThe electro-optical modulator based <strong>on</strong> Pockels effect implementsthe transiti<strong>on</strong> from electrical signal to optical signal. This makesusing optical fiber in EMC measurements come true. This paperdescribes the principle of modulators based <strong>on</strong> Pockels effect, designsthe modulator with high precisi<strong>on</strong>, calculates the electric field in themodulator, discusses the parameters of the modulator, and gives theequivalent electrical circuit.The Development of Integrated Electro-optic Sensor forIntensive Electric Field MeasurementR<strong>on</strong>g Zeng; Weiyuan Chen; Jinliang He; Puxua Zhu; Xiaolin Li; and QiWang, — Department of Electrical Engineering, Tsinghua UniversityIn order to meet the special demands of impulse electric field measurementsimultaneously, such as intensive signal, fine insulati<strong>on</strong>,transient, wide frequency band, and small size, three kinds of opticalelectric integrated electric field sensor were designed and fabricated.The output/input character and frequency resp<strong>on</strong>se of the sensorswere examined carefully. It can be found that the measurable amplitudeof two traditi<strong>on</strong>ally designed sensors is less than 80 kV/m,which is not suitable for intensive electric field measurement. But anovel sensor designed here is suitable for insulated, intensive (about300kV/m) electric field measurement. And the applicati<strong>on</strong> of which,in the lightning impulse experiment up<strong>on</strong> air gap, ensures that thesensor can be expected to be in widespread use in transient intensiveelectric field measurement investigati<strong>on</strong>s.Basis for a Wireless Network for EMC Measurements inElectric Substati<strong>on</strong>sW. H. Siew, University of Strathclyde; Karl Liu, N/A; Bukar Musa, N/A;Yu Wang, N/A; and Faheem Mir, N/ASwitching operati<strong>on</strong>s of power equipment, such as disc<strong>on</strong>nect switchand circuit breakers in high voltage substati<strong>on</strong>s, produce high frequencytransient currents which propagates al<strong>on</strong>g the busbars. Thebusbars then act as antennae, producing transient <strong>electromagnetic</strong>fields in the switchyards. In <strong>electromagnetic</strong> <strong>compatibility</strong> (EMC)c<strong>on</strong>siderati<strong>on</strong>s, the resulting fields are important sources of <strong>electromagnetic</strong>interference (EMI); moreover, highly sophisticated, newtechnology equipments are being introduced into the substati<strong>on</strong>senvir<strong>on</strong>ment for measurement, c<strong>on</strong>trol, protecti<strong>on</strong>, and communicati<strong>on</strong>purposes. These equipments are located close to the switchingequipments in the switchyards, hence to establish the EMC of theequipment it is desirable to quantify this high voltage envir<strong>on</strong>ment.This paper describes a new digital wireless measurement systemwhich is based <strong>on</strong> Bluetooth technology that can be used in powerstati<strong>on</strong>s or other similar harsh envir<strong>on</strong>ments. It comprises a RemoteAcquisiti<strong>on</strong> Unit (RAU), a Wireless Data Communicati<strong>on</strong> Network(WDCN) and a PC-based C<strong>on</strong>trol Platform. The performance andcapability of the system is assessed against another measurement systembased <strong>on</strong> fiber optics technology and found to be more portable,easier to install, and cheaper than the latter. The limitati<strong>on</strong>s of thewireless system are c<strong>on</strong>sidered and ways of addressing them in furtherresearch are discussed.On the Selecti<strong>on</strong> of Telecommunicati<strong>on</strong> Port ImpedanceStabilizati<strong>on</strong> Networks (ISNs)David Arnett, Hewlett Packard Company; and Edward Blankenship,Hewlett Packard CompanyWhen measuring telecommunicati<strong>on</strong> port c<strong>on</strong>ducted disturbances <strong>on</strong>10BaseT or 100BaseT Ethernet, test labs will find different testresults based <strong>on</strong> whether they select an ISN for two differential pairsor for four differential pairs. This paper discusses the reas<strong>on</strong> why testdata from the two ISN designs will sometimes agree and sometimesdiverge.Electromagnetic Compatibility Lack in Measuring Devicesand Quick Passive Detecti<strong>on</strong> MethodMarian Soinski; Roman Rygal; and Wojciech Pluta, — CzestochowaUniversity of Technology; and Piotr Kepski, Research & Development OfficeStr<strong>on</strong>g stati<strong>on</strong>ary magnetic fields from permanent magnet, or str<strong>on</strong>g<strong>electromagnetic</strong> fields from many different sources, when used in awr<strong>on</strong>g way, can change a proper behavior in already optimized technicalequipment. For example, many electr<strong>on</strong>ic electrical energymeters do not correctly count the c<strong>on</strong>sumpti<strong>on</strong> of electrical energy, orlow-voltage current transformers do not indicate proper levels of outputsignal. This is evidence of a lack of <strong>electromagnetic</strong> <strong>compatibility</strong>(EMC). To prevent the described situati<strong>on</strong> from happening, someacti<strong>on</strong>s have to be taken. This paper outlines the problem and proposesa possible soluti<strong>on</strong> to the phenomen<strong>on</strong> of illegal use of thedescribed lack of EMC.EMC TEST FACILITIES AND ANTENNASA Critique <strong>on</strong> Traceability in Site Validati<strong>on</strong> MeasurementsZh<strong>on</strong>g Chen, ETS-Lindgren; and Achim Enders, Technical University atBraunschweigSite validati<strong>on</strong> measurement procedures are specified in ANSI C63.4and ANSI C63.5 in the U.S., and CISPR 16 <str<strong>on</strong>g>internati<strong>on</strong>al</str<strong>on</strong>g>ly. The metricsfor site performance for both standards is the site attenuati<strong>on</strong> deviati<strong>on</strong>or normalized site attenuati<strong>on</strong> deviati<strong>on</strong>. However, the (normalized)site attenuati<strong>on</strong> deviati<strong>on</strong>s measured according to these standardsfor the same site-under-test are n<strong>on</strong>-unique, leading to ambiguitiesin the reference for traceability. Because the antennas used for siteattenuati<strong>on</strong> measurements are not specified, the variety of allowedantennas have a n<strong>on</strong>-negligible effect <strong>on</strong> site-attenuati<strong>on</strong> deviati<strong>on</strong>s.The main variable antenna characteristics which directly influence theapparent site resp<strong>on</strong>se are different antenna balun impedances, differentnear-field coupling effects for different antenna elements, and differentfar-field radiati<strong>on</strong> patterns. Results are presented for theseinfluencing factors to show that several dB variati<strong>on</strong>s in site attenuati<strong>on</strong>deviati<strong>on</strong>s can be obtained for the same site. C<strong>on</strong>sequently, standardsdevelopment organizati<strong>on</strong>s are suggested to (re-)c<strong>on</strong>sider specifyingand adopting some type(s) of reference antenna(s).Extracting Useful Informati<strong>on</strong> from Radiated Emissi<strong>on</strong> TestSite NSA and VNSA Data SetsEd Blankenship; David Arnett; and Gary Town; Hewlett-PackardCompany; Derick Skouby; and Henry Benitez, — ElectroMagneticInvestigati<strong>on</strong>s, LLCThis paper explores historical and technical details of the radiatedemissi<strong>on</strong> site attenuati<strong>on</strong> techniques. We give an example of additi<strong>on</strong>alinformati<strong>on</strong> bey<strong>on</strong>d pass/fail that can be gleaned from theresults. Our research dem<strong>on</strong>strates two ways to investigate test siteanomalies, using variati<strong>on</strong>s <strong>on</strong> the standard site attenuati<strong>on</strong> method.Verificati<strong>on</strong> of an EMC Facility Retro-Fit using Time-Domainand Field Uniformity MeasurementsDennis Camell, Nati<strong>on</strong>al Institute of Standards and Technology (NIST);Michael Taylor, Hach Co.; Robert Johnk, NIST; and Ben Davis, NISTThis paper summarizes a joint NIST-Industry measurement effort.Time-domain and field uniformity measurements are used to verify aretro-fit of RF absorber in an EMC Compliance Chamber from 30MHz to 6 GHz. Time gating and dense frequency packing of inser-©<str<strong>on</strong>g>2007</str<strong>on</strong>g> IEEE www.emc<str<strong>on</strong>g>2007</str<strong>on</strong>g>.org