The radar cross section of dielectric disks
Abstract
A solution is presented for the backscatter (monostatic) radar cross section of dielectric disks of arbitrary shape, thickness, and dielectric constant. The result is obtained by employing a Kirchhofftype approximation to obtain the fields inside the disk. The internal fields induce polarization and conduction currents from which the scattered fields and the radar cross section can be computed. The solution for the radar cross section obtained in this manner will be shown to agree with known results in the special cases of normal incidence, thin disks, and perfect conductivity. It will also be shown that the solution can be written as a product of the reflection coefficient of an identically oriented slab times the physical optics solution for the backscatter cross section of a perfectly conducting disk of the same shape. This result follows directly from the Kirchhofftype approximation without additional assumptions.
 Publication:

IEEE Transactions on Antennas and Propagation
 Pub Date:
 January 1984
 DOI:
 10.1109/TAP.1984.1143180
 Bibcode:
 1984ITAP...32....6L
 Keywords:

 Backscattering;
 Dielectrics;
 Disks (Shapes);
 Radar Cross Sections;
 Scattering Cross Sections;
 Kirchhoff Law;
 Physical Optics;
 Plane Waves;
 Power Series;
 Communications and Radar