Open AccessHybrid method for transient responses of transmission line in an apertured enclosure based on FETD method and transmission line equations
Author(s) -
Gong Yanfei,
Jiang Luhang
Publication year - 2020
Publication title -
iet science, measurement and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.418
H-Index - 49
eISSN - 1751-8830
pISSN - 1751-8822
DOI - 10.1049/iet-smt.2020.0043
Subject(s) - finite difference time domain method , transmission line , transient (computer programming) , telegrapher's equations , enclosure , physics , finite difference method , time domain , mathematical analysis , optics , mathematics , computer science , telecommunications , computer vision , operating system
A hybrid method combining the finite‐element time‐domain (FETD) method and transmission line (TL) equations (FETD‐TL) is presented for evaluating the transient responses of a lossy TL in an apertured rectangular enclosure excited by electromagnetic pulses. First, the electric fields in the enclosure without the TL are calculated based on the Bethe's small holes theory and the mirror procedure. Then, the enclosure's electric fields are introduced into the second‐order TL equation for current as the equivalent distributed sources. The transient currents induced on the TL are obtained by solving the second‐order TL equation for current based on the FETD method with a single iteration variable. Finally, the transient voltages induced on the TL are computed by discretising the first‐order TL equation. Compared with the method based on finite‐difference time‐domain (FDTD) method and TL (FDTD‐TL) via several examples, the proposed hybrid method is proved to be correct and effective, which possesses much higher convenience and efficiency than FDTD‐TL method in dealing with TL model terminated by complex lumped parametric networks.