Abstract
Investigations show the plasma-clad could affect the electromagnetic scattering properties of detected targets. As this principle, the method of remote diagnostics for plasma by microwave reflection measurement is investigated. In this study, the far-field Radar Cross Section (RCS) characteristics of a cylindrical plasma filled in quartz tube is simulated. By changing the parameters of plasma in model, the RCS data at different detective frequency (10-40 GHz) are observed. The results show that the plasma filled sufficiently affect the RCS characteristics of quartz tube. Through analyzing the RCS values and phase delays in different scattering angles compared to reference values at different frequencies, the plasma density and collision frequency could be obtained. The remote diagnostics would reduce the distribution to vector network analyzer from radiofrequency (rf) or microwave plasma.
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