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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2017-06-18
Comparison of Time-Domain Finite-Difference, Finite-Integration, and Integral-Equation Methods for Dipole Radiation in Half-Space Environments
By
Craig Warren,

    Dr. Craig Warren

    Univ Edinburgh

    Scotland

    Homepage

Silvestar Sesnic,

    Dr. Silvestar Sesnic

    Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture

    University of Split

    Croatia

    Homepage

Alessio Ventura,

    Dr. Alessio Ventura

    Department of Engineering

    Roma Tre University

    Italy

    Homepage

Lara Pajewski,

    Dr. Lara Pajewski

    Department of Information Engineering, Electronics and Telecommunications

    Sapienza University of Rome

    Italy

    Homepage

Dragan Poljak,

    Dr. Dragan Poljak

    Department of Electronic

    University of Split

    Croatia

    Homepage

Antonios Giannopoulos

    Dr. Antonios Giannopoulos

    University of Edinburgh

    UK

    Homepage

Progress In Electromagnetics Research M, Vol. 57, 175-183, 2017
doi:10.2528/PIERM17021602 | Google Scholar

Abstract
In this paper we compare current implementations of commonly used numerical techniques - the Finite-Difference Time-Domain (FDTD) method, the Finite-Integration Technique (FIT), and Time-Domain Integral Equations (TDIE) - to solve the canonical problem of a horizontal dipole antenna radiating over lossless and lossy half-spaces. These types of environment are important starting points for simulating many Ground Penetrating Radar (GPR applications which operate in the near-field of the antenna, where the interaction among the antenna, the ground, and targets is important. We analysed the simulated current at the centre of the dipole antenna, as well as the electric field at different distances from the centre of the antenna inside the half-space. We observed that the results from the simulations using the FDTD and FIT methods agreed well with each other in all of the environments. Comparisons of the electric field showed that the TDIE technique agreed with the FDTD and FIT methods when observation distances were towards the far-field of the antenna but degraded closer to the antenna. These results provide evidence necessary to develop a hybridisation of current implementations of the FDTD and TDIE methods to capitalise on the strengths of each technique.
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Citation
Craig Warren, Silvestar Sesnic, Alessio Ventura, Lara Pajewski, Dragan Poljak, and Antonios Giannopoulos, "Comparison of Time-Domain Finite-Difference, Finite-Integration, and Integral-Equation Methods for Dipole Radiation in Half-Space Environments," Progress In Electromagnetics Research M, Vol. 57, 175-183, 2017.
doi:10.2528/PIERM17021602
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