Study On RCS Of A Thin Plasma Attached To The Object

As a novel method for object stealth, plasmas stealth technology has been arousingmuch attention around the world during the recent years. A finite-difference time-domain(FDTD) algorithm is applied to study the radar cross section (RCS) of metallic cubecovered by inhomogeneous and unmagnetized plasma. The influences of plasma densitydistribution, collision frequency and thickness on the RCS of objects are presented. Theseresults indicated that when the plasma density is high, the RCS can be decreased byincreasing the thickness or collision frequency of plasma, when the plasma density is low,the RCS is not insensitive to collision frequency, but only determined by collisionfrequency. The effects of different plasma parameters and frequencies of the incident waveon the back RCS are also shown. Finally high frequency three-dimensional full-waveelectromagnetic field simulation software CST Microwave Studio is introduced and usedto calculate the RCS of simple and complicated objects covered by anisotropic plasma.The RCS of invisible objects is also discussed at different plasma parameters andfrequencies of the incident wave.