Accession Number:

AD0909467

Title:

Non-Specular Radar Cross Section Study.

Descriptive Note:

Final rept. 15 Apr 72-16 Jan 73,

Corporate Author:

MICHIGAN UNIV ANN ARBOR RADIATION LAB

Report Date:

1973-04-01

Pagination or Media Count:

114.0

Abstract:

The research described in this document is directed toward the reduction of non-specular radar cross sections and the optimization of specific surface impedance treatments for shapes characterized by such scattering. The optimization is carried out by means of a computer program which digitally solves the surface field integral equations for an impedance boundary condition. The original program was furnished by the Air Force Avionics Laboratory and was later modified by the Radiation Laboratory in order to meet the specific requirements of the task. Salient results of the investigation show that maximum performance is obtained with maximum surface coverage and that performance is generally traded off for less extensive surface treatment. An impedance variation that increases linearly with increasing distance toward the rear of a body is preferable to any other, provided the rate of change at the commencement and termination of the loading is not too great. Because of the dual nature of the integral equations for E- and H-polarizations, the impedance in the vicinity of the edge itself is critical, since a favorable result for one polarization can be detrimental for the other.

Subject Categories:

  • Radar Countermeasures
  • Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE