Analysis for scattering of plasma sheath of aircraft by ZT-FDTD method in three-dimensional space

Yongchang Yang; Zhiyong Wei; Meihua Fang; Guoyun Chen; Zixia Zhang

doi:10.1117/12.855174

2 April 2010 Analysis for scattering of plasma sheath of aircraft by ZT-FDTD method in three-dimensional space

Yongchang Yang, Zhiyong Wei, Meihua Fang, Guoyun Chen, Zixia Zhang

Proceedings Volume 7651, International Conference on Space Information Technology 2009; 76513A (2010) https://doi.org/10.1117/12.855174
Event: International Conference on Space Information Technology 2009, 2009, Beijing, China

Abstract

When space vehicles reentry atmosphere at hypersonic speed, a plasma sheath enveloping the spacecraft forms. The plasma sheath is a medium which is frequency dependent and lossy, so reflection and attenuation will happen when radio signals transport through the plasma sheath. In this paper, Finite Difference Time Domain using Z-transform method(ZT-FDTD) is used to analyze the problem. At first, Maxwell equations are transformed to make the expression independent of the medium properties, thus, the same equations can be used in different frequency dependent mediums, this technology achieves the feature of code portability. Then the ZT-FDTD method is extended to the three-dimensional space, by comparing the sectional drawing of the result in 3D with that in 1D to make sure of the correctness of the simulation in 3D, and then the method is used to study the scattering characteristics of objects in different situations in 3D. Finally we compare and give the analysis of different situations.

Citation Download Citation

Yongchang Yang, Zhiyong Wei, Meihua Fang, Guoyun Chen, and Zixia Zhang "Analysis for scattering of plasma sheath of aircraft by ZT-FDTD method in three-dimensional space", Proc. SPIE 7651, International Conference on Space Information Technology 2009, 76513A (2 April 2010); https://doi.org/10.1117/12.855174

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