Title :
An FEM-based numerical diffraction coefficient for irregular wedge configurations
Author :
Pelosi, Giuseppe ; Coccioli, Roberto ; Manara, Giuliano
Author_Institution :
Dept. of Electr. Eng., Florence Univ., Italy
fDate :
3/1/1997 12:00:00 AM
Abstract :
A hybrid numerical technique based on the finite-element method (FEM) is exploited to define a numerical diffraction coefficient for irregular wedge configurations as, for instance, a perfectly conducting wedge with an inhomogeneously filled cavity-backed aperture in one of its faces, or a wedge with a rounded edge. The hybrid technique combines the FEM with the uniform geometrical theory of diffraction (UTD), and is used to develop a numerical diffraction coefficient to account for contributions to the scattered field due to localized inhomogeneities in an otherwise canonical perfectly conducting wedge
Keywords :
electromagnetic fields; electromagnetic wave scattering; finite element analysis; geometrical theory of diffraction; EM wave scattering; FEM; UTD; finite-element method; hybrid numerical technique; inhomogeneously filled cavity-backed aperture; irregular wedge configurations; localized inhomogeneities; numerical diffraction coefficient; perfectly conducting wedge; rounded edge; scattered field; uniform geometrical theory of diffraction; Apertures; Conductors; Current distribution; Electromagnetic analysis; Electromagnetic diffraction; Electromagnetic scattering; Finite element methods; Geometry; Nonuniform electric fields; Physical theory of diffraction;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
