Minimization of backscattering of a cylinder by double loading

A theory is presented on the minimization of the backscattering of a cylinder by loading a cylinder at two points with lumped impedances. The induced current on a doubly loaded cylinder when illuminated by a plane electromagnetic wave at an arbitrary angle is obtained. The optimum loading to eliminate the broadside backscattering which is caused by the symmetrical component of the induced current is established. A suitable loading to reduce the off-broadside backscattering, due to the antisymmetrical component of the induced current, is also determined. A proper choice of the impedance and the position of double loading can lead to the reduction of the backscattering over a wide aspect range. The useful formulas for optimum loading and some graphical illustrations are included. The advantages of double loading over central loading are discussed.