# RCS and Near Field of a Dielectric Sphere

Calculate the radar cross section and the near field inside and outside of a dielectric sphere using the surface equivalence principle (SEP).

The bistatic radar cross section for sphere1 is computed by:

(1) $\sigma \left(bistatic\right)=\underset{r\to \infty }{\mathrm{lim}}\left[4\pi {r}^{2}\frac{\mid {\mathbf{\text{E}}}^{s}{\mid }^{2}}{\mid {\mathbf{\text{E}}}^{i}{\mid }^{2}}\right]$ .

1 C. A. Balanis, Advanced Engineering Electromagnetics, Wiley, 1989, pp. 655.