IEEE Transactions on Antennas and Propagation · 2002 · 46 citations · 9 references
ComputingComputational EngineeringElectrical EngineeringComputational ElectromagneticsFinite Element AnalysisFinite Element MethodsConvergence AnalysisElectromagnetic MethodsFinite Difference MethodsFinite Difference Time Domain AnalysisFinite Element DiscretizationScattering ProblemsAccuracyConvergenceFinite Difference Time Domain ModelingFinite Difference Time Domain SimulationFinite Element Scattering AnalysisFinite-difference Time-domain ScatteringMesh Size
A recently developed, stable, finite-element method (FEM), finite-difference time-domain (FDTD) hybrid that eliminates the staircase approximation of complex geometries is tested by convergence studies for radar cross-sections. For a conducting sphere, 1 dB accuracy in all directions is obtained with nine cells per wavelength, whereas the NASA almond requires a higher resolution of about 15 cells per wavelength. For scatterers with a smooth boundary, the results converge quadratically with the mesh size, but for a horizontally polarized wave incident on the NASA almond, the order of convergence is lower because of singular fields at the tip.
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