Abstract
The electromagnetic scattering of an ultra-high-speed plasma covered target is simulated by the field discrete Monte Carlo method. The flow field network is used to simulate the trajectory of electromagnetic wave particles according to the electromagnetic distribution parameters, and the electromagnetic characteristics are calculated according to the statistical parameters of the reflected particles. The computational time-consumption is less correlated with the incident electromagnetic wave frequency [except for the Radar Cross Section (RCS) valley characteristics], and it is convenient for parallel calculation, which realizes the fast calculation of the electromagnetic scattering of the electrically large plasma-covered target. On this basis, the electromagnetic scattering characteristics of the blunt cone hypervelocity target are calculated, and the main RCS reduction and enhancement mechanisms are given.
Highlights
In order to solve this problem, this paper introduces the Monte Carlo (MC) method to calculate the electromagnetic properties of the plasma covered target
Compared with the WKB and finite different time domain (FDTD) methods, the Monte Carlo is more suitable for simulating the interaction between the complex plasma sheath and EM waves
Aiming at the difficulty of simulating the electromagnetic characteristics of the hypervelocity target plasma sheath, this paper uses the field-discrete MC method to simulate the electromagnetic characteristics of the plasma-covered target
Summary
Hypervelocity aircraft will interact strongly with the surrounding atmosphere during the process of high-speed flight and attacking ground targets, which creates plasma sheath with extremely high electron densities. Collisions of charged particles in the sheath can cause energy loss and have a severe impact on the target electromagnetic scattering characteristics of the aircraft. With the change in flight altitude and speed, the flow field parameters and electrical parameter distribution around the target will change, showing different target radar characteristic information. The influence of the plasma sheath on the target radar scattering characteristics is an important factor to be considered in detecting and identifying hypervelocity aircraft and reentry missiles.. Hypervelocity aircraft will interact strongly with the surrounding atmosphere during the process of high-speed flight and attacking ground targets, which creates plasma sheath with extremely high electron densities.. With the change in flight altitude and speed, the flow field parameters and electrical parameter distribution around the target will change, showing different target radar characteristic information.. The influence of the plasma sheath on the target radar scattering characteristics is an important factor to be considered in detecting and identifying hypervelocity aircraft and reentry missiles.. In order to solve this problem, this paper introduces the Monte Carlo (MC) method to calculate the electromagnetic properties of the plasma covered target. The electromagnetic scattering characteristics of the blunt cone hypervelocity target are calculated, and the main Radar Cross Section (RCS) reduction and enhancement mechanisms are given
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