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This paper proposes a hybrid MoM/FDTD method for lossy wire structures with rectangular shape. Equivalent circuits are developed to evaluate electric field on the conductor surface. EM fields around the conductor are updated with FDTD equations. A validation case is presented finally.
This paper presents an investigation into lightning surges induced in buildings with the FDTD method. When down conductors (DCs) in a building discharge a lightning current, induced surges are observed in adjacent distribution circuits due to electric and magnetic coupling. The induced voltage in an open circuit and the induced current in a close circuit are, respectively, determined by the current...
This paper presents a study of lightning induced surges in railway signaling systems with the FDTD method. During an indirect lightning strike, induced surges are observed in the outdoor circuits due to electric and magnetic coupling. The induced surge currents propagate along the signal cables towards the receiving equipment in railway stations. It is found that geometry of the outdoor lines, earthing...
In this paper, a modified FDTD method using a hybrid Cartesian-cylindrical coordinate system is presented for modeling long wires with a axial symmetry structure. The wires are described with FDTD equations in a cylindrical coordinate system, and the non-wire zone in a Cartesian coordinated system. A thin-wire model is employed to link these field equations, and a time-domain solution is available...
This paper presents a numerical investigation into lightning induced surges using a FDTD method. When the down conductor in a building discharges a lightning current, substantial induced voltages are observed in the adjacent distribution circuits. The induced surge voltage is linearly proportional to wave-front parameters of the lightning discharge current, and is a logarithmic function of the distance...
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