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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38EMC <str<strong>on</strong>g>2007</str<strong>on</strong>g> ADVANCE PROGRAMproblem, the line-of-sight link between Rosetta Orbiter and Landerwill be used to measure the back lobes of the CONSERT Landerantenna with high angular resoluti<strong>on</strong>.An Efficient Shielding Effectiveness Calculati<strong>on</strong> <strong>on</strong> aRectangular Enclosure with Numerous Square AperturesParissa Dehkhoda; Ahad Tavakoli; and Rouzbeh Moini, — AmirkabirUniversity of TechnologyUtilizing the traditi<strong>on</strong>al transmissi<strong>on</strong> line model, the shielding effectivenessof an enclosure with numerous apertures is efficiently calculated.Here, the array of apertures is represented by an appropriateadmittance in the model. Since the representing admittance takesthe mutual coupling between apertures into account, the results aremore accurate than that of the traditi<strong>on</strong>al transmissi<strong>on</strong> line model.The results of this fast and accurate model are in very good agreementwith the MoM and semianalytical methods.COMPUTATIONAL ELECTROMAGNETIC MODELING IIIAnalytical HF Model of a Low Voltage DC Motor ArmatureIncluding Parasitic PropertiesJens Benecke; and Stefan Dickmann, — Helmut-Schmidt-UniversitätHamburgA high frequency (HF) electrical model of a DC motor armature isderived from its geometric and physical properties. This modelincludes the armature windings’ properties as well as inductive andcapacitive couplings between windings, armature, axis, and commutatorsurfaces. It provides sufficient detail to simulate the armature’scomplex impedance up to a frequency of approximately 1 GHz, providesexpressi<strong>on</strong>s to calculate the model elements from c<strong>on</strong>structi<strong>on</strong>parameters, and visualizes their influence <strong>on</strong> the impedance.Simulati<strong>on</strong> Analysis <strong>on</strong> EMI of an ±800 kV UHVDCC<strong>on</strong>verter Stati<strong>on</strong>Zhanqing Yu; Jinliang He; R<strong>on</strong>g Zeng; Bo Zhang; and Shuiming Chen, —Tsinghua University; H<strong>on</strong>g Rao; Jie Zhao; Xiaolin Li; and Qi Wang, —Technology Research Centre, China Southern Power Grid Co. Ltd.Wide-band frequency EM noise is generated during the processes offiring and turn-off of thyristor valves in c<strong>on</strong>verter stati<strong>on</strong>s. The noisewill be c<strong>on</strong>ducted al<strong>on</strong>g the primary circuitry, and may interfere withsec<strong>on</strong>dary systems by the way of c<strong>on</strong>ducted and radiated coupling.The ± 800 kV UHVDC transmissi<strong>on</strong> project is a newly developedtechnique and is not widely used in the world. The EMI problem is<strong>on</strong>e of most important issue that should be studied deeply in thestage of designing. A method of c<strong>on</strong>ducted EMI analysis based <strong>on</strong>the time-domain wide-band circuit simulati<strong>on</strong>, as well as a methodof radiated EMI analysis based <strong>on</strong> the Method of Moments, are proposedand verified in the paper. The EMI levels of the ±800 kV c<strong>on</strong>verterstati<strong>on</strong>, which is planned and being designed in China rightnow, are presented.An Investigati<strong>on</strong> <strong>on</strong> ILCMs for Coupling of Fields into aGeneric Missile Body through AperturesLawrence Chirwa, University of Ulster; John F. Daws<strong>on</strong>; and Martin P.Robins<strong>on</strong>, — University of YorkThe c<strong>on</strong>venti<strong>on</strong>al way of analyzing <strong>electromagnetic</strong> coupling intocavities is by means of full-wave solvers based <strong>on</strong> techniques such asthe finite-difference time-domain method, the method of moments,and the transmissi<strong>on</strong> line matrix (TLM) method. However, thesemethods require c<strong>on</strong>siderable computing resources and time to reacha soluti<strong>on</strong>. Intermediate level circuit models (ILCMs) have beenshown to be far more efficient than these c<strong>on</strong>venti<strong>on</strong>al methods.They are simpler and quicker to formulate and require significantlyless time to reach a soluti<strong>on</strong> than c<strong>on</strong>venti<strong>on</strong>al methods. This paperis <strong>on</strong> investigati<strong>on</strong>s in the bid to realize intermediate level circuitmodels for coupling into the generic missile body through apertures.A model for coupling via small apertures that yields credible results isrealized, and is validated against TLM results for the same problem.Simulati<strong>on</strong> and Analysis of EMC Chambers by Ray TracingMethodMing-Shing Lin, Nati<strong>on</strong>al Yunlin University of Science & Technology; Jia-Ming Ji, Dayeh University; Chung-I Hsu, Dayeh University; and Han-Chang Hsieh, Deputy Director of Sixth DEPTThe ray tracing method in c<strong>on</strong>juncti<strong>on</strong> with image theory was usedin this study to establish an analysis tool for evaluating the propertiesof EMC chambers. Computer codes were written in Matlab forsimulating the normalized site attenuati<strong>on</strong> (NSA), field uniformity(FU), and normalized site transmissi<strong>on</strong> loss (NSTL). By the simulati<strong>on</strong>program, NSAs of a semi-anechoic chamber and NSTLs of a fullyanechoic chamber were simulated and compared with measuredresults. The effects of the sec<strong>on</strong>d-order reflecti<strong>on</strong> <strong>on</strong> the simulatedNSAs of semianechoic chambers were discussed.Reduced Order Modeling for Transient Analysis of Carb<strong>on</strong>Nanotube Interc<strong>on</strong>nectsGiulio Ant<strong>on</strong>ini; and Ant<strong>on</strong>io Orlandi, — University of L’AquilaA state-space formulati<strong>on</strong> for transient analysis of carb<strong>on</strong> nanotubeinterc<strong>on</strong>nects is presented. Peculiar features of carb<strong>on</strong> nanotubesrelated to electr<strong>on</strong> transport are modeled in terms of per unit lengthparameters. The multic<strong>on</strong>ductor transmissi<strong>on</strong> line is firstly approximatedby a ladder network; its admittance matrix Y is expressed interms of Chebyshev polynomials in a closed form. The knowledge ofthe roots of such rati<strong>on</strong>al representati<strong>on</strong> makes it possible to generatea compact state-space macromodel of the nanotube interc<strong>on</strong>nect byselecting <strong>on</strong>ly the dominant poles. Numerical calculati<strong>on</strong>s, performedin both frequency and time domains, c<strong>on</strong>firm that the proposedmodel can be used to model carb<strong>on</strong> nanotube interc<strong>on</strong>nects asa building block of more complex systems.TLM Simulati<strong>on</strong> of RF Emissi<strong>on</strong>s and C<strong>on</strong>firmati<strong>on</strong> ofResults Through TestingDavid Johns, Flomerics; and Boris Shusterman, EMC Corporati<strong>on</strong>The Transmissi<strong>on</strong>-Line Matrix (TLM) method has been developed forthe EMC analysis of circuits and equipment packaging. TLM is usuallyformulated in the time-domain, enabling transient phenomenasuch as lightning, EMP, and ESD to be analyzed. In additi<strong>on</strong>, equivalentcompact models allow detailed features such as apertures andwires to be modeled in a computati<strong>on</strong>ally efficient manner whendealing with real-world structures. Recently the TLM technique hasbeen enhanced to enable complex circuits to be replaced with equivalentradiating sources for the simplicity of the analysis.SHIELDING PERFORMANCE MODELINGNumerical Modeling of Periodic Composite Media for anElectromagnetic Shielding Applicati<strong>on</strong>Dagang Wu; Rui Qiang; Ji Chen; and Ce Liu, — University of Houst<strong>on</strong>;Marina Koledintseva, UMR; Jim Drewniak, UMR; and BruceArchambeault, IBM Corporati<strong>on</strong>This paper describes a methodology to extract effective electricalproperties for a periodic composite medium. The extracti<strong>on</strong> algo-©<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