**
Diffraction of a Plane Electromagnetic Wave by a Dielectric Step**

**A. A.
Komarov, V. A. Permyakov**

**Moscow Power
Engineering Institute (National Research University),**

**Department of
Antennas and Propagation of Radio Waves**

Received
July 24, 2013

**Abstract:
**The 2-D problem of diffraction of a plane
electromagnetic wave by a dielectric step between two homogeneous half-spaces
is considered. The problem is numerically solved using the method of surface
integral equations. Equivalent surface currents and scattering cross-sections
for various shapes of the dielectric step with a height of 30 wavelengths and a
relative permittivity of 3-i0,018 are calculated. The calculated scattering
cross-sections are compared with experimental data for the sea ice and icebergs.

**Keywords: **diffraction,
plane electromagnetic wave, surface integral equations method, dielectric step,
scattering cross-section of the ice field.