• Rohit Kumar
• Prashant Kumar
• Abhinav Kumar
• Surbhi

An ultra-thin, quad-band metamaterial absorber with high absorptivity in each operating band is given in this study. The proposed structure is made up of a square ring, a circular split ring, and four inner symmetric quadrants printed on a 1.6mm thick FR4 substrate. The simulated outcome demonstrates that under normal incident electromagnetic conditions, the quad-band metamaterial absorber achieves high absorbance of 99.58%, 99.85%, 99.91%, and 99.55% at 7.04GHz, 8.13 GHz, 10.91GHz, and 12.54GHz respectively. The absorber has a symmetrical design and exhibits polarization-insensitive behaviour under normal incidence. Additionally, it exhibits high absorption for wide incident angles up to 45 for both transverse electric and magnetic polarizations. Surface current distribution is used to analyze the absorption mechanism of different parts of the proposed metamaterial absorber (MMA). The designed quad band absorber can be used in C and X band applications.

"Design and analysis of polarization independent multiband meta-material absorber for defence applications", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 7, page no.g628-g639, July-2024, Available :http://www.jetir.org/papers/JETIR2407671.pdf

"Design and analysis of polarization independent multiband meta-material absorber for defence applications", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 7, page no. ppg628-g639, July-2024, Available at : http://www.jetir.org/papers/JETIR2407671.pdf