Accession Number:

ADA080441

Title:

Electromagnetic Scattering by a Metallic Disk.

Descriptive Note:

Technical rept.,

Corporate Author:

OHIO STATE UNIV COLUMBUS ELECTROSCIENCE LAB

Personal Author(s):

Report Date:

1979-09-01

Pagination or Media Count:

129.0

Abstract:

The scattering of electromagnetic waves by finite obstacles can be rigorously found for only two cases, the sphere and the disk. There exist two exact solutions to the scattering of an electromagnetic plane wave by a circular metallic disk. Flammers and Meixners exact approaches are successively considered and compared. In both cases, the fields are expanded in spheroidal vector wave functions, and the scattered field is uniquely determined by the boundary conditions on the surface of the disk and the edge condition. The purpose of this work is to find a solution valid everywhere in particular, it is desired to obtain the surface current and near fields. A numerical test of the bistatic scattered far-field for normal incidence is presented. Problems encountered in Flammers solution for arbitrary incidence are pointed out. The general form of the scattered field is derived from Meixners vector potentials. This formulation is appropriate for near-field calculations. Another proof of Meixners solution using dependence relations of the spheroidal vector wave functions is given. Author

Subject Categories:

  • Active and Passive Radar Detection and Equipment
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE