Minimization of backscattering of a loop by impedance loading--Theory and experiment

A study on the minimization of the backscattering of a conducting loop by the impedance loading method is presented. A conducting circular loop loaded symmetrically with two identical lumped impedances is assumed to be illuminated by a plane electromagnetic wave at normal incidence. The induced current on and the backscattered field by the loaded loop are determined. The optimum impedance loading for zero backscattering is obtained. The optimum reactive loading for minimum backscattering is also studied. An experiment was conducted to verify the theory.