Affiliations: [a] Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, Jiangsu, China | [b] Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing 210044, Jiangsu, China
Correspondence:
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Corresponding author: Xiangchao Li, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, Jiangsu, China. E-mail:000420@nuist.edu.cn
Abstract: The purpose of this paper is to solve the
problem of coaxial line may suffer the invasion of lightning current during
the process of transferring microwave signal, which would damage the
electronic equipment and then deteriorate the quality of transmission.
First, the theories of transmission line and quarter-wave short circuit are
analyzed. Second, by utilizing the simulation tool and vector network
analyzer, this paper evaluates the analytical and experimental S21 parameters
of protective devices to ensure the normal signal transmission. Finally, the
simulated lightning currents generated from combined wave
generator (1.2/50 μs, 8/20 μs) are also applied to the impact experiment. The simulation results
are summarized as follows: quarter-wave short circuit with wavelength of
1/4λ shows high resistance to the lightning and does not affect the signal
transmission; the residual voltage and current positively correlate with the
impulse voltage magnifying from 0.2 to 5 kV and are suppressed in low ranges.
The proposed method provides effective lightning protection in the
application of signal transmission.
