An evaluation of Finite-Difference and Finite-Integration Time-Domain modelling tools for Ground Penetrating Radar antennas

Warren, Craig, Pajewski, Lara, Ventura, Alessio and Giannopoulos, Antonios (2016) An evaluation of Finite-Difference and Finite-Integration Time-Domain modelling tools for Ground Penetrating Radar antennas. In: EuCAP 2016 - 10th European Conference on Antennas and Propagation, 10th - 15th April 2016, Davos, Switzerland.

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Warren et al - Finite-Difference and Finite-Integration Time-Domain modelling tools for GPR antennas.pdf - Accepted Version

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Official URL: http://ieeexplore.ieee.org/document/7482010/

Abstract

The development of accurate and realistic models of Ground Penetrating Radar (GPR) antennas is being driven by research into quantitative amplitude information from GPR, improved GPR antenna designs, and better-performing forward simulations that can feed into inversion algorithms. The Finite-Difference Time-Domain (FDTD) method and Finite-Integration technique (FIT) are popular numerical methods for simulating electromagnetic wave propagation. Time-Domain methods are particularly well-suited to modelling ultra-wideband GPR antennas as a broad range of frequencies can be modelled with a single simulation. We present comparisons using experimental and simulated data from a Geophysical Survey Systems 1.5 GHz antenna and a MALÅ Geoscience 1.2 GHz antenna. The antennas were investigated in free space and over a lossy dielectric environment with a target. For the simulations we used a commercial solver - Computer Simulation Technology Microwave Studio (CST) - and a free open-source FDTD solver - gprMax. For each test scenario, phase and amplitude information from the antenna responses were compared. Generally, we found very good agreement between the experimental data and the two simulations.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Ground penetrating radar, Numerical models, Microwave antennas, Computational modeling, Dielectrics, Time-domain analysis
Subjects: F800 Physical and Terrestrial Geographical and Environmental Sciences
H200 Civil Engineering
H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Craig Warren
Date Deposited: 13 Jul 2017 12:56
Last Modified: 07 Sep 2017 01:12
URI: http://nrl.northumbria.ac.uk/id/eprint/31282

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