Abstract
Using symplectic integrator propagator, a three-dimensionalfourth-order symplectic finite difference time domain (SFDTD) method isstudied, which is of the fourth order in both the time and spacedomains. The method is nondissipative and can save more memory comparedwith the traditional FDTD method. The total field and scattered field(TF-SF) technique is derived for the SFDTD method to provide theincident wave source conditions. The bistatic radar cross section (RCS)of a dielectric sphere is computed by using the SFDTD method for thefirst time. Numerical results suggest that the SFDTD algorithm acquiresbetter stability and accuracy compared with the traditional FDTDmethod.
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