Wei X.,Communication University of China |
Wei X.,National Key Laboratory on Electromagnetic Scattering |
Peng S.-L.,CAS Institute of Mechanics |
Yin H.-C.,Communication University of China |
And 2 more authors.
Xi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics | Year: 2011
A redundant plasma wake is produced when the high-speed reentry vehicle cuts through the atmosphere. Accordingly, the plasma wake calculation method under the condition of real gas effect and the shift operator finite difference time domain method are utilized comprehensively. Firstly, the distribution of the inhomogeneous plasma flowfield is achieved by the relative parameters of the reentry vehicle, and hereby the electromagnetic scattering model of the plasma wake target is established. Taking the cone-spheroid target as an example, the low frequency electromagnetic scattering characteristics are calculated and analyzed when it cuts through the atmosphere with a zero attack angle. The results demonstrate that the back-scattering of the reentry vehicle with a high speed is dramatically enhanced at low frequency band by the plasma wake, from which the low frequency radar will benefit in detecting reentry vehicles.