An Ultrathin Polarization Free Asterick-Shaped Metamaterial Absorber with Quad-Band Characteristics

Figure 1

Unit cell schematic of the proposed absorber (a = 10, b = 9.8, c = 0.2, d = 7, e = 1, f = 8,  = 3, h = 0.2, i = 1.29, and j = 0.2 (All dimensions are in mm)).