Minimization of backscattering of a metallic loop by impedance loading

It is shown that the backscattering of a metallic loop can be minimized experimentally by loading the loop with two identical reactive impedances. In the experiment, circular and rectangular loops were illuminated by plane waves of various frequencies. It is observed that with appropriate choice of loading impedances the backscatter of a loop can be minimized to the noise level over a wide frequency range.