Journal of Communication Engineering

Journal of Communication Engineering

Extraction of Electromagnetic Scattering from Random Rough Surfaces in Complex Environments using Numerical Methods

Document Type : Research Paper

Authors
Amir Hatamian 1
Changiz Ghobadi 2
Javad Nourinia 2
Ehsan Mostafapour 3
Rahim Barzegari 1
1 Department of Electrical Engineering, Urmia University, Urmia, Iran
2 Department of Electrical and Computer Engineering Urmia University, Urmia, Iran
3 Urmia University
10.22070/jce.2022.14642.1188
Abstract
In this study, we present a comprehensive overview of the exact and approximate models and methods that are available to measure the dispersion of random rough surfaces. We investigated the structural implementation of such surfaces in the finite-difference time-domain (FDTD) simulation environment and introduced a method for error reduction in simulated environments with such surfaces to improve the accuracy of near-path scattering of random rough surfaces. For this aim, a new adsorbent consisting of two types of adsorbents with distinct properties is proposed. During different tests in environments with the random rough surfaces and more complex environments with abnormal dispersers, the superiority, and higher performance of the proposed adsorbents are verified and then, properties of the adsorbents are investigated. Next, two dimensional random rough surfaces are analyzed to investigate electromagnetic scattering. To determine the electromagnetic scattering field, surface height's and slope's joint probability density function is calculated and utilized after generating a two-dimensional rough surface. The ray-tracing base model is exploited, and then the Monte-Carlo technique is hired to convert an infinite integration form into the form of finite integration.
Keywords
Absorbent layers
Random rough surface scattering
Finite-difference time-domain (FDTD) numerical method
Numerical methods in electromagnetism
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