Wave Propagation and Scattering in Random Media and Rough Surfaces
نویسنده
چکیده
Many natural and man-made media such as the atmosphere, oceans, geophysical media, biological media, and composite and disordered materials have random spatial inhomogeneities and vary randomly in time, and these media are called “random media. ’’ Microwaves, optical waves, and acoustic waves propagating in these media experience random fluctuations in space and time, and these fluctuations affect a broad range of practical problems such us communications, remote-sensing, imaging, and object identification. In addition, waves in random media present one of the most challenging problems to theoreticians. This paper rei’iews the historical development, basic theories, and some recent new developments and discoveries, including backscattering enhancement.
منابع مشابه
Imaging and Coherence in Rough Surface and Object Scattering
This paper is concerned with two problems. First, when the object is near a rough surface such as an ocean or terrain, and the transmitter and the receiver are also located near the surface, how can we image or detect the object which may be obscured by multiple scattering due to rough surface scattering. Second, even though multiple scattering generally increases the incoherent field, there ar...
متن کاملExperimental Studies of Millimeter- Wave Scattering in Discrete Random Media and from Rough Surfaces
متن کامل
Sea Surfaces Scattering by Multi-Order Small-Slope Approximation: a Monte-Carlo and Analytical Comparison
L-band electromagnetic scattering from two-dimensional random rough sea surfaces are calculated by first- and second-order Small-Slope Approximation (SSA1, 2) methods. Both analytical and numerical computations are utilized to calculate incoherent normalized radar cross-section (NRCS) in mono- and bi-static cases. For evaluating inverse Fourier transform, inverse fast Fourier transform (IFFT) i...
متن کاملImaging and Detection of Objects in Random Media and near Rough Surfaces
1. Introduction Imaging and detection of objects are important current problems with applications to optical and ultrasound imaging in biological media, detection of landmines and other objects in geophysical media, multiple scattering effects on wireless communications, and detection of targets near land and sea. One of the important questions is the multiple scattering effects on imaging. Whe...
متن کاملNumerical Analysis of Electromagnetic Scattering from a Dielectric Rough Surface Cylinder
1.Introduction The wave scattering from rough surfaces is an important problem which closely relates to the measurement technology or diagnosing techniques by using microwave, millimeter wave, light wave or acoustic wave (1). Various kinds of theoretical models and methods for analyzing the wave scattering from random rough surfaces have been proposed so far. However, they have often used appro...
متن کامل