Scattering from thin apertures in coated conductors using FDTD
Abstract
The Finite-Difference Time-Domain (FDTD) technique is applied to scattering problems involving thin dielectric sheets, conductor-backed dielectric sheets and conductor-backed dielectric sheets containing cracks in the dielectric coating. The FDTD technique is first applied in a brute force method to solve the scattering problems. Then, coarse cells are used whereby the dimensions of the scatterer can be smaller than the dimensions of the FDTD unit cell. This approach, referred to as the thin equation approach, is computationally more efficient than the brute force method. Numerical results are shown in the frequency domain. Specifically, radar cross section (RCS) and near-field results obtained using a two-dimensional FDTD code are presented.
- Publication:
-
Final Report Kansas Univ. Center for Research
- Pub Date:
- December 1990
- Bibcode:
- 1990kans.rept.....D
- Keywords:
-
- Apertures;
- Coatings;
- Conductors;
- Finite Difference Theory;
- Radar Cross Sections;
- Radar Scattering;
- Crack Propagation;
- Dielectric Properties;
- Dielectrics;
- Film Thickness;
- Near Fields;
- Thin Films;
- Communications and Radar