Metasurface for Independent Control of Reflection Amplitude

Independently, manipulation of magnitude and phase of a reflected wave is one of the important issue for modulation of the electromagnetic wave in free space propagation. We proposed a novel configuration of metasurface capable of controlling reflected wave magnitude without disturbing the phase angle of the wave. The proposed meta-unit structure is consisting of a single layer two L- shaped structure resonator inside a rectangular shape resonator. For the tuning of the reflected amplitude, we have used a PIN diode on one diagonal side of the L-shaped structure. The simulated result shows the magnitude of a reflected wave changing for different resistance values of a biased PIN diode without disturbing the phase angle.