Bistatic Scattering and Transmitting Through a Fractal Rough Dielectric Surface Using the Forward and Backward Method With Spectrum Acceleration Algorithm (Fbm/Saa)

Abstract

To numerically simulate bistatic scattering from fractal rough dielectric surface at low grazing angle (LGA), a hybrid approach of the forward-backward method (FBM) with spectral accelerate algorithm (SAA) is developed. The impedance matrix of the electric or magnetic field integral equations is decomposed into four submatrices for fast FBM algorithm. Bistatic scattering from and transmitting through one-dimensional (1-D) fractal rough surface with any dielectric constant are calculated. Angular reflectivity and transmission demonstrate the energy conservation, and its functional dependence upon the surface parameters are discussed. A linear relationship between the envelope slope of the bistatic scattering pattern and the fractal dimension is also discussed.