Polarization insensitive switchable metamaterial absorber/reflector for X-band applications

M. G. Mustapha (Universiti Teknologi Malaysia)
M. K. A. Rahim (Universiti Teknologi Malaysia)
N. A. Murad (Universiti Teknologi Malaysia)
O. Ayop (Universiti Teknologi Malaysia)
S. Tuntrakool (King Mongkut Institute of Technology Ladkrabang (KMITL))
M. A. Baba (Universiti Teknologi Malaysia)
A. Y. Iliyasu (Universiti Teknologi Malaysia)
Mohd Ezwan Jalil (Universiti Teknologi Malaysia)

Bulletin of Electrical Engineering and Informatics
Vol 9, No 6: December 2020

A unit cell of squared shaped polarization-insensitive switchable metamaterial absorber/reflector is presented. The structure operates at 10.20 GHz under both absorber mode and reflector mode configurations. Copper wire bridging the gaps to form a circular shape structure were used as switches for operation mode selections. The structure was designed on an FR4 substrate, and the incidental wave angles were varied from 0 to 50 degrees. The structure demonstrated almost 100% absorption at resonance, 3.314 GHz percentage bandwidth at 80% as an absorber. On the other hand, as reflector, it demonstrated almost a 90% reflection and a usable bandwidth of 3.327 GHz.