The Effect of the Equivalent Permittivity Model in Contactless MIMO-GPR Imaging

Area of Science:

• Geophysics
• Electromagnetics
• Radar Technology

Background:

• Multiple-Input-Multiple-Output Ground-Penetrating Radar (MIMO-GPR) offers improved subsurface imaging by utilizing multiple transmitter and receiver channels.
• MIMO-GPR enhances reconstruction accuracy and target detection capabilities for diagnostic applications.

Purpose of the Study:

• To develop a 2D radar imaging approach for contactless MIMO GPR.
• To formulate the imaging problem as a linearized inverse scattering problem under Born approximation.
• To adopt a ray propagation model using equivalent permittivity for wave propagation analysis.

Main Methods:

• A 2D imaging approach for MIMO GPR is presented.
• The imaging problem is linearized using the Born approximation.
• An adjoint inversion method is employed to solve the inverse problem.
• A ray propagation model with spatially varying equivalent permittivity is utilized.

Main Results:

• The proposed imaging strategy demonstrates sufficient accuracy for engineering applications.
• Numerical simulations confirm the computational efficiency of the method.
• Reliable target reconstruction is achieved through adjoint inversion.

Conclusions:

• The developed 2D MIMO-GPR imaging approach is accurate and computationally efficient.
• The method provides a reliable tool for subsurface target reconstruction.
• This technique advances contactless GPR diagnostic capabilities.