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Title:A Higher -Order Finite Element: Boundary Integral Method for Electromagnetic Scattering and Radiation From Bodies of Revolution
Author(s):Dunn, Eric Alan
Doctoral Committee Chair(s):Jin, Jianming
Department / Program:Electrical Engineering
Discipline:Electrical Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Physics, Electricity and Magnetism
Abstract:The hybrid finite element - boundary integral method (FE-BI) is used to compute the radar cross section (RCS) and radiated fields of bodies of revolution (BOR). This is a 2.5-D problem since it allows simulations in a 2-D domain to correspond to a full 3-D object. The interior region, which corresponds to the local near-field of the scatterer/radiator is modeled with a higher-order finite element method (FEM) using interpolatory mixed node/vector basis functions. The radiation condition for the exterior region is enforced by using the method of moments (MoM) to form a boundary integral to enclose the interior region. Scattering problems are excited by a uniform plane wave which is decomposed into a superposition of cylindrical waves. Likewise, radiation problems are excited by local current sources which are decomposed into a Fourier series. For both scattering and radiation analysis each Fourier/cylindrical mode can be evaluated independently. The FE-BI method very accurately models the fields generated by any BOR. Increasing the order of the basis functions is shown to further improve the accuracy.
Issue Date:2005
Description:112 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2005.
Other Identifier(s):(MiAaPQ)AAI3198979
Date Available in IDEALS:2015-09-25
Date Deposited:2005

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