Electromagnetic Scattering by an Object Embedded in a Stratified Medium.
R AND D ASSOCIATES MARINA DEL REY CA
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A general electromagnetic scattering formulation is presented for the situation in which a perfectly conducting body is embedded in a horizontally or radially stratified medium. The electric field integro-differential equation EFIDE and magnetic field integral equation MFIE are derived for the determination of the surface current density induced on the body by a general class of sources. Expressions are also presented for the use of the current density to determine the electric and magnetic fields scattered by the body into any layer of the medium. Detailed expressions for the MFIE and EFIDE are presented for the horizontally stratified two-layered medium configuration corresponding to the object being in a vacuum half-space above a lossy half-space. A computer code, which is an extended version of NEC-2A, is developed for the solution of the two-layer MFIE for a situation where the object is a model of an aircraft. Results corresponding to special cases obtained by this computer code are compared to experimental data as well as to numerical results obtained by another independently developed computer code.
- Numerical Mathematics
- Electricity and Magnetism
- Radiofrequency Wave Propagation