Radar Cross Section Measurement Method of Inhomogeneous Plasma with Electrically Large Scale Based on Near-field Imaging

In this paper, the vacuum and low electromagnetic scattering experiment device with spatial scales
$\Phi 4000 \times 8000 mm$
was introduced. The electromagnetic scattering characteristics experiment of non-uniform argon plasma was studied by using the far field extrapolation scattering center near field imaging method. The experimental results are shown that the difference of the test results is less than 2dB for the non-uniform distribution of argon plasma.