Affiliations: Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China
Correspondence:
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Corresponding author: Xiang-Chao Li, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044, China. E-mail:000420@nuist.edu.cn
Abstract: In accordance with the theory of waveguide, the electric
field and magnetic field equations of transverse electromagnetic propagating
in coaxial line were derived. Based on the equivalent impedance of coaxial
line after the broken-down of gas discharge tube (GDT) that connected in
parallel, the corresponding relation between reflection coefficient and the
equivalent impedance of the main modules at the reflector surface of Z= 0
is established. The high-order mode function of the excitation magnetic
current was also analyzed. To solve the transmission and suppression
problems of lightning wave propagation, we combined theories with experiment
and draw conclusions: a) higher mode will be excited when the lightning wave
propagates on the coaxial line with the line terminal to be open; b) the
lightning wave energy will be absorbed by terminal load and higher mode will
be also excited when the characteristic impedance of the load is same with
the coaxial line; c) the GDT will become a reflector when the lightning wave
go through it and part of the wave will be reflected. Part of the energy of
the lightning wave will be discharged by GDT and only a little of the energy
will be absorbed by the load. The experimental results are consisted with
the theories analysis and have a great of significance in practical
applications.
