A hybrid IEM–PO method for composite scattering from a PEC object above a dielectric sea surface with large windspeed: HH polarization

Abstract

In the paper, for HH polarization the composite scattering from 2-D perfectly electric conducting (PEC) object situated above 1-D dielectric sea surface with large windspeed is investigated by an efficient hybrid method combining integral equation method with physical optics (IEM–PO). In the hybrid method, IEM is applied to study the direct scattering of underlying sea surface, whereas PO is employed to deal with the direct scattering of object. The mutual couplings between sea surface and object are also solved by PO method based on the equivalence principle and multi-path scattering strategy. In numerical simulations, the bistatic normalized radar cross-section (NRCS) of composite model are calculated by the proposed method and are validated by numerical experiments for different incident angles and windspeeds. The results show the hybrid IEM-PO method has a good accuracy and can greatly reduce the computational time and memory requirement.

Acknowledgments

The authors thank the reviewers for their helpful and constructive suggestions.

Additional information

Funding

This work was supported in part by the National Natural Science Foundation of China [grant number 61501360] and [grant number 61401345]; the National Natural Science Foundation for Distinguished Young Scholars of China [grant number 61225002]; the China Postdoctoral Science Foundation [grant number 2017M613067] and [grant number 2017M613069].