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

Figure 8

Surface current at the top and bottom faces of the proposed structure at (a) 3.10 GHz, (b) 5.42 GHz, (c) 16.65 GHz, (d) 17.56 GHz, and (e) 20.29 GHz.

(a)

(b)

(c)

(d)

(e)