Abstract
The paper examines the antenna model for the transient analysis of electromagnetic field coupling to straight wire configurations buried in a lossy half-space. The wire antenna theory (AT) model is implemented directly in the time domain and it is based on the corresponding space-time Pocklington integrodifferential equation. The solution of the Pocklington equation is carried out analytically. The obtained results are compared against the results calculated via the transmission line (TL) approach. The TL approach is based on the telegrapher’s equations, which are solved using the modified transmission line method (MTLM) and Finite Difference Time Domain (FDTD) technique, respectively. Some illustrative computational examples for buried straight wire scatterer and horizontal grounding electrode are given throughout this work.
Highlights
The analysis of transient electromagnetic field coupling to buried wire configurations is of interest in antennas, propagation, and electromagnetic compatibility (EMC) applications, for example, communications and power cables, geophysical investigations, grounding systems, and ground penetrating radars (GPR)
Some discrepancies can be observed between the results obtained via antenna theory (AT)-time domain (TD) and transmission line (TL) methods versus AT-FD method, which is expected since two former methods have a similar approximation which is not valid for shorter wires
Direct time domain analysis of the transient behaviour of the buried wire scatterer and horizontal grounding electrode based on the rigorous antenna theory model has been discussed in this work
Summary
The analysis of transient electromagnetic field coupling to buried wire configurations is of interest in antennas, propagation, and electromagnetic compatibility (EMC) applications, for example, communications and power cables, geophysical investigations, grounding systems, and ground penetrating radars (GPR). This rather simple geometry itself could be used as a canonical reference structure to test numerical methods and codes, respectively. This paper revisits and fully extends the full-wave (AT) analysis methods of transient electromagnetic coupling to straight buried wire scatterer and horizontal grounding electrode configurations directly in the time domain presented in [6,7,8,9,10,11]. Modelling of straight buried scatterer and horizontal grounding electrode, respectively, is outlined in different sections
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