Wide band electrical parameter measurement by absorber pasted ridged horn antenna

Wide band electrical parameter measurement for thin material samples is presented by two identical ridged waveguide horn antennas facing each other to propagate quasi-TEM mode between ridges. To suppress multi-reflection inside horns, absorber sheets put on the walls are designed to minimize standing wave in the waveguide. We demonstrate wide band shielding effectiveness measurements and show the method to find electrical parameters of the materials by proposed system.