The Radar Cross Section of a Two Dimensional Dielectric Coated Cylinder Using On-Surface Radiation Conditions
Abstract
The purpose of this study was to use On-Surface Radiation Conditions (OSRC) to approximate the RCS of a two dimensional dielectric coated circular cylinder and compare the results to an exact solution. The comparisons were made to determine a lower and/or upper bound on the frequency, radius of curvature of the cylinder or any other pertinent parameters for a valid approximation. The problem was formulated for a circular cylinder of radius a coated by a lossy dielectric of radius b and a unit magnitude plane wave incident from the theta = 180 degrees direction with wave number k. The OSRC solution and the eigenfunction solution were nearly identical; however, the overall accuracy of the OSRC technique was shown to be governed by a complicated expression which was dependent on the dielectric material parameters as well as the kb product. The solutions were compared for three different circumstances: fixed frequency and varying dielectric layer thickness; fixed geometry and bistatic RCS. The OSRC solution was said to be good if the error was less than 2db.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1988
- Accession Number
- ADA202935
Entities
People
- William D. Oetting
Organizations
- Air Force Institute of Technology