Monostatic Radar Cross Section Simulation of Small Unmanned Aerial Vehicles in UHF Band

This paper studies the monostatic radar cross section (RCS) simulation of a popular Unmanned Aerial Vehicle (UAV), DJI Phantom 2 Vision Plus in UHF band. The RCS $(\sigma)$ is evaluated when the plane wave is horizontally and vertically polarized. First, for a constant $\theta (\theta=90^{\circ})$ and a varying $\phi (0^{\circ}\leq\phi\leq 90^{\circ})$ , the results show that $\sigma_{hh}$ is higher than the other polarizations, its highest value is found when $\phi=0^{\circ}$ or $\phi=90^{\circ}$ , meaning when the excitation is in front of the center of the blades. Second, for constant $\phi (\phi=0^{\circ})$ and a varying $\theta (0^{\circ}\leq\theta\leq 180^{\circ})$ , in this case also, $\sigma_{hh}$ is higher than the other polarizations, its values are quite constant around $-17dBsm$ with $2dBsm$ more when looking from the bottom or from the top $(-15dBsm)$ . These results give us an idea about the optimal position of the radar to get the highest value of the RCS of the drone.