An efficient FDTD model for resistively loaded cylindrical antennas with coaxial lines

Title
An efficient FDTD model for resistively loaded cylindrical antennas with coaxial lines
Authors
현승엽김세윤김영식
Keywords
coaxial transmission lines; cylindrical antennas; finite-difference time-domain (FDTD) methods; loaded antennas
Issue Date
2009-02
Publisher
IEEE transactions on antennas and propagation
Citation
VOL 57, NO 2, 484-490
Abstract
A full coarse-grid based finite-difference time-domain (FDTD) model is proposed for an efficient analysis of resistively loaded cylindrical antennas driven by coaxial feed lines. In the case of the electrically thin resistive antenna, the thin-wire approximation is applied to the near fields around the antenna. The resistive antenna is equivalently represented by a series connection of piecewisely lumped resistors along the antenna axis. And the coaxial line is replaced by an equivalent source over the feed aperture of the line. Then the corresponding FDTD update equations make it possible to implement the full coarse-grid model without additional grid refinements for the antenna and the feed line. The transient reflected feed voltage and the input impedance of resistive antennas are calculated numerically and compared with those of a full fine-grid.
URI
http://pubs.kist.re.kr/handle/201004/34621
ISSN
0018-926X
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