Users Code for the Finite-Difference Time-Domain Method
Final technical rept. 30 Sep 1980-30 Sep 1981
IIT RESEARCH INST CHICAGO IL
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Electromagnetic penetration and scattering problems are difficult to treat with many analytical or numerical methods because of the inability of these methods to simply deal with the effects of structure materials, apertures, curvatures, corners, and internal contents. In previous programs, a new approach for the direct modeling of very complex electromagnetic interaction problems was studied the finite-difference, time-domain FD-TD solution of Maxwells equations. The FD-TD method has key advantages relative to available modeling approaches. These advantages permit it to accurately treat complex problems that are beyond the scope of solution by any other method. The goals of the present research program included the development of specific algorithms of high importance to help provide a flexible, simple-to-use, and highly accurate user- oriented FD-TD computer program. Five key improvements in the FD-TD algorithm were tested during this effort, including the following 1 Total-field scattered-field lattice division, 2 Variable angle of incidence, 3 Second- order accurate radiation condition, 4 Magnitude and phase computation condition for the sinusoidal steady state, and 5 Near-to-far field transformation.
- Theoretical Mathematics
- Computer Programming and Software
- Electricity and Magnetism