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B‐scan wave outline analysis in numerical modeling of ground‐penetrating radar response from layered rough interfaces
Author(s) -
Liu Ying,
Guo LiXin
Publication year - 2019
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31498
Subject(s) - ground penetrating radar , rough surface , surface finish , radar , surface roughness , perfectly matched layer , boundary (topology) , finite difference time domain method , interface (matter) , geology , rough set , materials science , optics , engineering , computer science , physics , mathematics , mathematical analysis , composite material , data mining , telecommunications , capillary number , capillary action
Imaging of rough interfaces in a layered structure requires full understanding of the characteristics of their ground penetrating radar (GPR) echoes. In this study, a finite‐difference time‐domain computational model using a uniaxial perfectly matched layer boundary for GPR demining of layered rough interfaces is constructed. On the basis of this model, the numerical results of B‐scan echoes from two‐layered and three‐layered rough interfaces with different degrees of roughness are obtained and compared with the profiles of corresponding rough surfaces. These results and comparisons highlight the relationship between the B‐scan wave outlines and the profile of the layered rough interfaces. The effect of roughness of the interface on the B‐scan echoes are analyzed, and the influence of the upper rough surface profile on the shape of the B‐scan wave outline from the lower rough surface is discussed.