Related Experiment Video
Updated: Jun 4, 2026
11:34
Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
Fast numerical method for electromagnetic scattering from an object above a large-scale layered rough surface at
1School of Science, Xidian University, Xi'an, Shaanxi Province, China. wanganqi0006@163.com
Applied Optics
|February 2, 2011
Summary
This study presents a fast numerical method for electromagnetic scattering from conducting objects over rough dielectric surfaces. The parallel fast multipole method and method of moments efficiently calculate bistatic scattering, considering various parameters.
Area of Science:
- Computational electromagnetics
- Numerical analysis
- Wave scattering
Background:
- Electromagnetic scattering calculations are crucial for various applications.
- Efficient methods are needed for complex geometries like conducting objects over rough surfaces.
- Previous methods may lack speed or struggle with large incidence angles.
Purpose of the Study:
- To develop and present a fast numerical method for electromagnetic scattering.
- To analyze scattering from a perfectly electric conducting object above a two-layered dielectric rough surface.
- To investigate the impact of large incidence angles on scattering characteristics.
Main Methods:
- Combining the parallel fast multipole method (PFMM) with the method of moments (MoM).
- Utilizing the biconjugate gradient (BCG) method for solving unsymmetrical matrix equations.
- Parallelizing the computational approach for improved efficiency.
Main Results:
- The proposed method demonstrates fast simulation times.
- Parallel speedup ratios were analyzed across different processor counts.
- Numerical results illustrate the influence of rough surface parameters, object properties, and the intermediate medium on bistatic scattering.
Conclusions:
- The developed PFMM-MoM approach offers an efficient solution for electromagnetic scattering problems.
- The study provides insights into parameter dependencies affecting scattering behavior.
- The method is suitable for analyzing complex composite scattering scenarios.
Related Concept Videos
01:30Plane Electromagnetic Waves I
The existence of combined electric and magnetic fields that propagate through space as electromagnetic (EM) waves is the most significant prediction of Maxwell's equations. As Maxwell's equations hold in free space, the predicted electromagnetic waves do not require a medium for their propagation. An EM wave comprises an electric field, defined as the force per charge on a stationary charge, and a magnetic field, which is the force per charge on a moving charge.
The EM field is assumed to be a...
The EM field is assumed to be a...
01:29Plane Electromagnetic Waves II
Consider a plane wavefront traveling in position x-direction with a constant speed. This wavefront can be utilized to obtain the relationship between electric and magnetic fields with the help of Faraday's law.
01:29Potential Due to a Polarized Object
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
01:30Propagation Speed of Electromagnetic Waves
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
01:24Electromagnetic Wave Equation
Maxwell's equations for electromagnetic fields are related to source charges, either static or moving. These fields act on a test charge, whose trajectory can thus be determined using suitable boundary conditions. The objective of electromagnetism is thus theoretically complete.
However, although electric and magnetic fields were first introduced as mathematical constructs to simplify the description of mutual forces between charges, a natural question emerges from Maxwell's equations: What...
However, although electric and magnetic fields were first introduced as mathematical constructs to simplify the description of mutual forces between charges, a natural question emerges from Maxwell's equations: What...
01:15Standing Electromagnetic Waves
Electromagnetic waves can be reflected; the surface of a conductor or a dielectric can act as a reflector. As electric and magnetic fields obey the superposition principle, so do electromagnetic waves. The superposition of an incident wave and a reflected electromagnetic wave produces a standing wave analogous to the standing waves created on a stretched string.
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...