Title :
An investigation of new FETD/ABC methods of computation of scattering from three-dimensional material objects
Author :
Komisarek, Kenneth S. ; Wang, Nan N. ; Dominek, Allen K. ; Hann, Raiford
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
fDate :
10/1/1999 12:00:00 AM
Abstract :
Finite-element time-domain (FETD) and absorbing boundary condition (ABC) methods for computation of scattering from three-dimensional (3-D) material objects are developed and investigated. The methods involve discrete-time FETD solution of the time-domain Helmholtz equation in a region that comprises the 3-D scatterer and its immediate vicinity. Coupling of the solution to the surrounding infinite space is achieved through the ABC. This FETD/ABC formulation is examined for a number of various geometries: sphere, plate, and ogive
Keywords :
Helmholtz equations; boundary-value problems; conducting bodies; electric resistance; electromagnetic wave absorption; electromagnetic wave scattering; finite element analysis; matrix algebra; radar cross-sections; time-domain analysis; 3D material objects; 3D scatterer; EM wave scattering; FETD matrix equations; FETD/ABC methods; PEC; RCS; absorbing boundary condition; discrete-time FETD solution; finite-element time-domain; ogive; plate; resistive geometries; sphere; time-domain Helmholtz equation; Boundary conditions; Differential equations; Electromagnetic scattering; Finite element methods; Geometry; Laboratories; Maxwell equations; Radar scattering; Time domain analysis; Transmission line matrix methods;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
