Scattering of targets over layered half space using a semi-analytic method in conjunction with FDTD algorithm
- 19 August 2014
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 22 (17), 20691-20704
- https://doi.org/10.1364/oe.22.020691
Abstract
Finite-difference time-domain (FDTD) algorithm with a new method of plane wave excitation is used to investigate the RCS (Radar Cross Section) characteristics of targets over layered half space. Compare with the traditional excitation plane wave method, the calculation memory and time requirement is greatly decreased. The FDTD calculation is performed with a plane wave incidence, and the RCS of far field is obtained by extrapolating the currently calculated data on the output boundary. However, methods available for extrapolating have to evaluate the half space Green function. In this paper, a new method which avoids using the complex and time-consuming half space Green function is proposed. Numerical results show that this method is in good agreement with classic algorithm and it can be used in the fast calculation of scattering and radiation of targets over layered half space.Funding Information
- National Natural Science Foundation of China (NSFC) (61231003)
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