Title :
Analysis of 3D bodies with periodicity in one direction and finite sized in the others using a combined formulation in both real and spectral domains
Author :
Ribas, E.G. ; Catedra, M.F.
Author_Institution :
ETS de Ingenieros de Telecomunicacion, Univ. Politecnica de Madrid, Spain
Abstract :
A numerical scheme to analyze 3-D bodies of resonant size with arbitrary geometry and material composition is presented. The bodies are periodic in one direction (y): in the other directions (x,z) the bodies are finite sized. A new formulation has been developed and it is applied in combination with the conjugate gradient-fast Fourier transform method. The formulation is based on the discretization and the resolution of the EFIE (electric field integral equation) in both real and spectral domains, obtaining a very efficient and accurate numerical procedure. Some results on radar cross section, equivalent currents. and fields inside the body for a specific 3D periodic structure (infinitely long cylinders with arbitrary shape and material composition) are presented and successfully compared with analytical solutions.<>
Keywords :
conjugate gradient methods; electromagnetic wave scattering; fast Fourier transforms; integral equations; radar cross-sections; 3D bodies; EFIE; EM analysis; EM scattering; arbitrary geometry; arbitrary material composition; conjugate gradient-fast Fourier transform method; discretization; electric field integral equation; equivalent currents; internal fields; numerical scheme; one-directional periodicity; radar cross section; real domain; resolution; resonant size; spectral domain; Composite materials; Electromagnetic analysis; Fourier transforms; Geometry; Green´s function methods; Periodic structures; Resonance; Shape; Telecommunications; Testing;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1991. AP-S. Digest
Conference_Location :
London, Ontario, Canada
Print_ISBN :
0-7803-0144-7
DOI :
10.1109/APS.1991.175072
