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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EMC <str<strong>on</strong>g>2007</str<strong>on</strong>g> ADVANCE PROGRAM 37method to solve <strong>electromagnetic</strong> <strong>compatibility</strong> problems efficiently.Its numerical results are examined and compared with the c<strong>on</strong>venti<strong>on</strong>alADI-CPML method. It is found that for a CFL number equalto 5, the reflecti<strong>on</strong> error of the ERADI- CPML is approximately 12dB better than the c<strong>on</strong>venti<strong>on</strong>al ADI-CPML method.Efficient 3D Simulati<strong>on</strong> of Thin C<strong>on</strong>ducting Layers ofArbitrary ThicknessGöran Erikss<strong>on</strong>, Saab Communicati<strong>on</strong>, Saab ABIn this paper it is dem<strong>on</strong>strated how a class of relatively complexEMC simulati<strong>on</strong>s can be performed at a low cost, both in terms oftime and m<strong>on</strong>ey. Using a symmetric, two-way boundary c<strong>on</strong>diti<strong>on</strong>formulati<strong>on</strong>, shielding metal layers can be included in a global <strong>electromagnetic</strong>simulati<strong>on</strong>, without the need to resolve in detail theinterior of the layer. This formulati<strong>on</strong>, which has been previouslyused for some specific microwave and EMC problems, has no restricti<strong>on</strong>s<strong>on</strong> the ratio of layer thickness to the skin depth. It is implementedin a commercial finite element method (FEM) solverinstalled <strong>on</strong> a standard PC, and no source-code programming isrequired. The method is validated and its usefulness dem<strong>on</strong>stratedby applying it to a number of 3D examples of general EMC relevance.Wide-Band Hybrid MM-PO Computati<strong>on</strong>al ElectromagneticsTechnique Using [Z] Matrix Interpolati<strong>on</strong> and AdaptiveFrequency SamplingAndrzej Karwowski; and Artur Noga, — Silesian University of TechnologyIn this paper, we present a highly efficient computati<strong>on</strong>al <strong>electromagnetic</strong>stechnique for wide-band analysis of antennas radiating inthe presence of electrically large c<strong>on</strong>ducting bodies (platforms). Thetechnique is based up<strong>on</strong> the well known Moment Method–PhysicalOptics (MM-PO) hybrid formulati<strong>on</strong> combined with the impedancematrix interpolati<strong>on</strong> and a dynamic adaptive frequency sampling ofthe desired observable. Numerical examples are given to dem<strong>on</strong>stratec<strong>on</strong>siderable savings in both computer memory and CPU timeoffered by the proposed approach.COMPUTATIONAL ELECTROMAGNETIC MODELING IIFast FDTD Simulati<strong>on</strong> Using Laguerre Polynomials in MNAFrameworkKrishna Srinivasan; Ege Engin; and Madhavan Swaminathan, — GeorgiaInstitute of TechnologyIn this paper, a fast transient simulati<strong>on</strong> scheme using Laguerre polynomials,called Laguerre-MNA, has been developed for FDTD andcircuit simulati<strong>on</strong>. Compani<strong>on</strong> models for the Yee cells and circuitcomp<strong>on</strong>ents have been derived, permitting the use of MNA analysisto perform FDTD/transient circuit simulati<strong>on</strong>s using the Laguerremethod. Compani<strong>on</strong> models help simplify the matrix setup andreduce the matrix dimensi<strong>on</strong> that needs to be solved without employingl<strong>on</strong>g cumbersome equati<strong>on</strong>s. The FDTD simulati<strong>on</strong> usingLaguerre polynomials is unc<strong>on</strong>diti<strong>on</strong>ally stable and has shown to bemuch faster than the c<strong>on</strong>venti<strong>on</strong>al FDTD scheme. Prior work <strong>on</strong> transient<strong>electromagnetic</strong> simulati<strong>on</strong>s using Laguerre polynomials has adrawback of being able to simulate <strong>on</strong>ly for a certain time-durati<strong>on</strong>.A memory/time efficient soluti<strong>on</strong> has been proposed by which simulati<strong>on</strong>can be d<strong>on</strong>e for all time.Applicati<strong>on</strong> of a Hierarchical SVD/ACA Compressi<strong>on</strong>Technique to Near-Field Calculati<strong>on</strong>s of M<strong>on</strong>opole AntennasMiguel Astner, TU Hamburg-Harburg; Heinz-D. Brüns, TU Hamburg-Harburg; Guido Bürger, HVB Systems GmbH; and Hermann Singer, TUHamburg-HarburgThis paper describes the c<strong>on</strong>cept of hierarchical matrices and theapplicati<strong>on</strong> to near-field calculati<strong>on</strong>s of voltage or power drivenantennas. The hierarchical matrix structure is based up<strong>on</strong> a binarypartiti<strong>on</strong> of the structure to be analyzed, where blocks of the matrixcan be represented as full matrices or R(k)-matrices, the latter yieldinga data reduced representati<strong>on</strong> of the initial block. It has beenfound that the applicati<strong>on</strong> of <strong>on</strong>ly the adaptive cross-approximati<strong>on</strong>(ACA) matrix reducti<strong>on</strong> technique gave bad results in many practical3D cases and failed to predict the physical current distributi<strong>on</strong>. Theway out of this dilemma is to combine ACA with singular valuedecompositi<strong>on</strong> (SVD), yielding reliable results again. The new compressi<strong>on</strong>scheme turns out to be efficient and stable, and will bedescribed in detail. By means of examples, the validity of theapproach is dem<strong>on</strong>strated, where especially near-field investigati<strong>on</strong>sare carried out.Efficient Evaluati<strong>on</strong> of Equivalent-Principle Sources inMoM-FDTD Hybrid Method by Employing SpatialInterpolati<strong>on</strong> and Adaptive SamplingAndrzej Karwowski; and Tomasz Topa, — Silesian University ofTechnologyThe MoM-FDTD hybrid approach requires the informati<strong>on</strong> to beexchanged back and forth between the MoM-regi<strong>on</strong>s and the FDTDregi<strong>on</strong>scoupled through the Huygens’ surfaces. For electrically largestructures, evaluati<strong>on</strong> of the electric and magnetic field comp<strong>on</strong>entsand the related equivalence-principle sources <strong>on</strong> the Huygens’ surfacescan represent a significant (even dominant) fracti<strong>on</strong> of the totalsoluti<strong>on</strong> time required for the problem. In this paper, we dem<strong>on</strong>stratea possibility of increasing the computati<strong>on</strong>al efficiency of theMoM-FDTD hybrid method by employing a spatial interpolati<strong>on</strong>combined with adaptive sampling in calculating the electric andmagnetic field comp<strong>on</strong>ents and the effective sources <strong>on</strong> the Huygens’surfaces. Numerical examples show that the proposed approach offersa c<strong>on</strong>siderable CPU time saving.Near Field - Far Field C<strong>on</strong>versi<strong>on</strong> Based <strong>on</strong> GeneticAlgorithm for Predicting Radiati<strong>on</strong> from PCBsH<strong>on</strong>gmei Fan; and Franz Schlagenhaufer, — The University of WesternAustraliaA near field-far field c<strong>on</strong>versi<strong>on</strong> based <strong>on</strong> a genetic algorithm hasbeen performed for a printed circuit board with a ground plane. Arobust procedure for a pre-selecti<strong>on</strong> of dipole moments has beenintroduced. Important aspects of setting up the c<strong>on</strong>versi<strong>on</strong> problem,such as the number of equivalent dipoles and choice of matchingpoints, have been addressed.Use of Genetic Algorithms to Solve Inverse ScatteringProblemsDirk Plettemeier, Technische Universität Dresden; Stefan Balling, TechnischeUniversität Dresden; Diemo Landmann, N/A; and Karl-Heinz G<strong>on</strong>schorek,Technische Universität DresdenThe inverse scattering problem described in this paper is part of thequasi-tomographic Comet Nucleus Sounding Experiment byRadiowave Propagati<strong>on</strong> (CONSERT) of the comet-missi<strong>on</strong> Rosetta.This part of the experiment is based <strong>on</strong> the utilizati<strong>on</strong> of radiati<strong>on</strong>coupling effects between the CONSERT antenna system <strong>on</strong> theRosetta-Lander and the subsurface structure of the comet nucleus inthe vicinity of the Lander. The scientific aim of this part of CON-SERT is the rec<strong>on</strong>structi<strong>on</strong> of the subsurface structure at the landingsite, especially in view of the still open questi<strong>on</strong>: “Is a comet nucleussurround by a dust layer or not?” To solve this inverse scattering©<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