Electron Density Inversion for Plasma Medium Based on Antenna Performance Parameters

Plasma around an antenna will change the impedance of the antenna, which will lead to the change of antenna resonance frequency, antenna pattern, and antenna voltage standing wave ratio. In this paper, the plasma electron density was estimated by analyzing the variation of antenna performance parameters. Results indicate that the complex nonlinear relationship between plasma electron density and antenna performance parameters can be estimated by neural network method, which provide a convenient method to estimate plasma electron density.