Hyun, Seung-Yeup Kim, Se-Yun 2024-01-20T18:03:17Z 2024-01-20T18:03:17Z 2021-09-05 2010-12 0018-926X https://pubs.kist.re.kr/handle/201004/130865 For the efficient finite-difference time-domain (FDTD) analysis of electrically thin and resistively loaded cylindrical antennas, the 2-D cylindrical thin-wire approach with circular symmetry is extended to the 3-D Cartesian FDTD with non-cubic cells for asymmetric cases. The axial geometry of the antenna is represented as a set of piecewise-linear lumped resistors. And the near fields around the antenna and the coaxial feed aperture are approximated to the quasi-static fields with the cylindrical behavior. From the cylindrical-to-Cartesian coordinate transformation of the quasi-static fields and the contour-path integration along FDTD unit cells in the vicinity of the antenna and its feed, the 3-D Cartesian FDTD equations are derived. These equations may correspond to a full coarse-grid FDTD approach with the equivalent corrections. For some numerical examples, the proposed approach provides comparable accuracy to the reference data with fine-grid resolution. Effects of the cell size and the resistive loading profile are investigated numerically. English IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC REPRESENTATION RADIATION MODEL 3-D Thin-Wire FDTD Approach for Resistively Loaded Cylindrical Antennas Fed by Coaxial Lines Article 10.1109/TAP.2010.2078461 1 IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, v.58, no.12, pp.4095 - 4099 IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 58 12 4095 4099 scie scopus 000285052100041 2-s2.0-78650007879 Engineering, Electrical & Electronic Telecommunications Engineering Telecommunications Article REPRESENTATION RADIATION MODEL Finite-difference time-domain (FDTD) methods loaded antennas resistive loadings thin wires