Thin-wire finite-difference time-domain model for insulated and resistively loaded cylindrical antennas driven by coaxial lines

S. Y. Hyun, S. Y. Kim, Y. S. Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A thin wire-based finite-difference time-domain (FDTD) model for a simple analysis of insulated and resistively loaded cylindrical antennas fed by coaxial lines is proposed. The resistive loading and the coaxial feed line are approximated to equivalent resistors along the antenna axis and the equivalent source over the infinitesimal feed gap, respectively. The effects of the insulation are corrected by employing thin-wire approximation and the boundary condition. A full coarse-grid FDTD algorithm is then implemented without additional grid refinements for the insulation, the resistive loading and the feed line. As a function of insulation properties and resistive loading profiles, the transient reflected feed voltage and the input impedance of antennas are calculated numerically. The validity of the proposed model is proved by comparing it with the results of the full fine-grid FDTD.

Original languageEnglish
Pages (from-to)507-513
Number of pages7
JournalIET Microwaves, Antennas and Propagation
Volume3
Issue number3
DOIs
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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