Open AccessRKADE‐ADI FDTD applied to analysis of terahertz wave characteristics of plasma
Author(s) -
Wanjun Song,
Hou Zhang
Publication year - 2017
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2016.0889
Subject(s) - finite difference time domain method , terahertz radiation , plasma , optics , alternating direction implicit method , reflection (computer programming) , dissipation , plasma sheet , physics , radar , computational physics , finite difference method , mathematics , computer science , mathematical analysis , telecommunications , quantum mechanics , thermodynamics , programming language , magnetosphere
Terahertz (THz) radar has a good potentiality for the countermeasure of plasma stealth due to its high imaging resolution and strong penetration ability. It is of great importance to investigate the THz wave characteristics of plasma for applying THz radar to counter plasma stealth. The Runge–Kutta ADE alternating direction implicit finite difference time domain (RKADE‐ADI FDTD) for plasma is proposed through combining the RKADE technique with ADI FDTD, which is aimed at acquiring more accurate THz wave characteristics of plasma. The dispersion error and dissipation error of the RKADE technique are analysed and compared with those of ADE scheme. Through comparing the reflection and transmission coefficients of a plasma sheet calculated by the RKADE‐ADI FDTD with those obtained by ADE‐ADI FDTD, error‐optimised ADE‐ADI FDTD, and analytical method, the validity of the proposed method is confirmed. The propagation and reflection characteristics of non‐magnetised plasma sheet at THz band are analysed by the proposed method. The reasons for the phenomena of THz wave interaction with plasma are interpreted theoretically.