PO calculation for reduction in radar cross section of hypersonic targets using RAM

The radar cross section (RCS) reduction of hypersonic targets by radar absorbing materials (RAM) coating under different reentry cases is analyzed in the C and X bands frequency range normally used for radar detection. The physical optics method is extended to both the inhomogeneous plasma sheath an...

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Bibliographic Details
Published in:Physics of plasmas 2018-06, Vol.25 (6)
Main Authors: Liu, Song-hua, Guo, Li-xin, Pan, Wei-tao, Chen, Wei, Xiao, Yi-fan
Format: Article
Language:English
Subjects:
Flight vehicles
Mathematical analysis
Maxima
Physical optics
Plasma
Plasma physics
Plasma sheaths
Radar absorbers
Radar cross sections
Radar detection
Reduction
Reentry shielding
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Summary:The radar cross section (RCS) reduction of hypersonic targets by radar absorbing materials (RAM) coating under different reentry cases is analyzed in the C and X bands frequency range normally used for radar detection. The physical optics method is extended to both the inhomogeneous plasma sheath and RAM layer present simultaneously. The simulation results show that the absorbing coating can reduce the RCS of the plasma cloaking system and its effectiveness is related to the maximum plasma frequency. Moreover, the amount of the RCS decrease, its maxima, and the corresponding optimal RAM thickness depend on the non-uniformity and parameters of the plasma sheath. In addition, the backward RCS of the flight vehicle shrouded by plasma shielding and man-made absorber is calculated and compared to the bare cone.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.5030194