Research on the scattering characteristics of electromagnetic waves in time‐varying and weakly collisional and fully ionized dusty in plasma

Abstract

In this study, a three‐dimensional (3D) time‐varying dusty plasma iterative finite‐difference time‐domain (FDTD) algorithm is deduced by combining the relative permittivity of fully ionised dusty plasma and the shift‐operator FDTD method. Then, a 3D time‐varying dusty plasma model is established. The scattering characteristics of electromagnetic (EM) waves are analysed by calculating the backward radar cross‐sections (RCSs) of different parameters in time‐varying dusty plasma. The results show that the RCS will increase when the dust particles are considered in plasma. The values of RCS increase with the dust radius dust concentration relaxation time of charge and electron density increasing. In dusty plasma, the electron temperature has a different effect on the incident wave frequency bands. Finally, the effects of dust to electron density ratio on RCS are analysed and as the increase of the incident frequency, the absorption of dusty plasma on EM wave will reduce.