Iterative alghorithm for simulation of EM scattering by objects, contained constructive elements of different electric sizes

2017 ◽  
Author(s):  
O. I. Sukharevsky ◽  
G. S. Zalevsky ◽  
V. A. Vasilets
Keyword(s):  
Em Scattering

A Statistical Kirchhoff Model for EM Scattering from Gaussion Rough Surface

PIERS Online ◽  
2005 ◽  
Vol 1 (2) ◽  
pp. 187-191 ◽  
Author(s):  
Yang Du ◽  
Tao Xu ◽  
Yingliang Luo ◽  
J. A. Kong
Keyword(s):  
Rough Surface ◽  
Em Scattering ◽  
Kirchhoff Model

scholarly journals Detection of the Lunar Surface Soil Permittivity with Megahertz Electromagnetic Wave

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2466
Author(s):  
Qingwen Rao ◽  
Guanjun Xu ◽  
Wangchen Mao
Keyword(s):  
Lunar Surface ◽  
Scattering Theory ◽  
Surface Soil ◽  
Low Frequency ◽  
Stable Phase ◽  
Em Scattering ◽  
Lunar Dust ◽  
Lunar Ionosphere ◽  
Spaceborne Radar ◽  
Reflection Characteristics

In this paper, the detection of the lunar surface soil permittivity with megahertz electromagnetic (EM) waves by spaceborne radar is studied based on the EM scattering theory, the Boltzmann–Shukla equations, and the improved scattering matrix method (ISMM). The reflection characteristics of the lunar surface soil subject to megahertz waves are analyzed through the EM scattering theory and expressed by the lunar surface soil permittivity. Then, the lunar ionosphere is assumed to be composed of dusty plasma, and its EM characteristics are described with the Boltzmann–Shukla equations. Finally, the transmission and reflection characteristics of the propagation of EM waves in the lunar ionosphere are numerically calculated with ISMM. Thus, the complex permittivity of lunar surface soil is obtained. In addition, the effects of detection environment situations, such as the lunar illumination intensity, characteristics of the lunar dust and dust charging process in the lunar ionosphere, on the amplitude and phase of EM waves are also investigated in this study. The simulation results show that an EM wave at a high frequency induces a strong effective wave with a stable phase shift and a significantly small interferential wave. Moreover, the lunar illumination is more effective under EM waves in low frequency bands; the characteristics of the lunar dust have a notable influence on the transmission and absorption coefficients of the effective waves. These conclusions help in real applications involving the detection of the lunar surface soil permittivity by spaceborne radar in various lunar environments.

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