A broadband Perfect Metamaterial Absorber (PMA) on FR-4 Epoxy substrate for X-band and Ku-Band applications is proposed. The unit cell structure is composed of rectangular patches of appropriate shapes and orientation on top of the metal-backed dielectric substrate having a thickness of 2.7 mm (0.16λL). The relative absorption bandwidth is 79% (more than 85% absorption) covering the entire X-band and the Ku-Band of the microwave frequencies. The surface current distributions of the top and bottom planes have been analyzed to elaborate the absorption mechanism of the structure. The broadband characteristics of the design support its claim of being useful to a wide range of applications in both commercial and research sectors. Such applications include military and stealth devices, thermal sensors and electronic-cloaking devices.
2. Shelby, R. A., D. R. Smith, and S. Schultz, "Experimental verification of a negative index of refraction," Science, Vol. 292, No. 5514, April 2001.
3. Pendry, J. B., "Negative refraction makes a perfect lens," Phys. Rev. Lett., Vol. 85, No. 18, October 2000.
4. Bakir, M., et al., "Tunable perfect metamaterial absorber and sensor applications," Journal of Materials Science: Materials in Electronics, Vol. 27, 12091-12099, 2016.
5. Dincer, F., et al., "Multi-band polarization independent cylindrical metamaterial absorber and sensor application," Modern Physics Letters B, Vol. 30, 1650095-9, 2016.
6. Huang, L. and H. Chen, "Multi-band and polarization insensitive metamaterial absorber," Progress In Electromagnetics Research, Vol. 113, 103-110, 2011.
7. Singh, P., S. Kabiri Ameri, L. Chao, M. N. Afsar, and S. Sonkusale, "Broadband millimeterwave metamaterial absorber based on embedding of dual resonators," Progress In Electromagnetics Research, Vol. 142, 625-638, 2013.
8. Pendry, J. B., D. Schurig, and D. R. Smith, "Controlling electromagnetic fields," Science, Vol. 312, No. 5781, June 2006.
9. Unal, E., et al., "Tunable perfect metamaterial absorber design using the golden radio and energy harvesting and sensor applications," Journal of Materials Science: Materials in Electronics, 10.1007/s 10854-015-3642-7.
10. Dincer, F., O. Akgol, M. Karaaslan, E. Unal, and C. Sabah, "Polarization angle independent perfect metamaterial absorbers for solar cell applications in the microwave, infrared, and visible regime," Progress In Electromagnetics Research, Vol. 144, 93-101, 2014.
11. Chambers, B. and A. Tennant, "Optimized design of Jaumann radar absorbing materials using a genetic algorithm," IEE Proc. Radar Sonar and Navig., Vol. 143, No. 1, February 1996.
12. Costa, F., A. Monorchio, and G. Manara, "Analysis and design of ultrathin electromagnetic absorbers comprising resistively loaded high impedance surfaces," IEEE Transactions on Antennas and Propagation, Vol. 58, No. 5, May 2010.
13. Noor, A. and Z. Hu, "Metamaterial dual-polarized resistive Hilbert curve array radar absorber," IET Microw. Antennas Propag., Vol. 4, No. 6, 667-673, 2010.
14. Ding, F., Y. Cui, X. Ge, Y. Jin, and S. He, "Ultra-broadband microwave metamaterial absorber," Applied Physics Letters, Vol. 100, 103506, 2012.
15. Shen, Y., Z. Pei, Y. Pang, J. Wang, A. Zhang, and S. Qu, "An extremely wideband and lightweight metamaterial absorber," Journal of Applied Physics, Vol. 117, 224503, 2015.
16. Li, S.-J., X.-Y. Cao, J. Gao, T. Liu, Y.-J. Zheng, and Z. Zhang, "Analysis and design of threelayer perfect metamaterial-inspired absorber based on double split-serration-rings structure," IEEE Transactions on Antennas and Propagation, Vol. 63, No. 11, November 2015.
17. Sen, G., A. Banerjee, Sk. Nurul Islam, and S. Das, "Ultra-thin miniaturized metamaterial perfect absorber for X-band application," Microwave and Optical Technology Letters, Vol. 58, No. 10, 2367-2370, October 2016.
18. Qiu, K. and S. Feng, "A novel metamaterial absorber with perfect wave absorption obtained by layout design," Journal of Electromagnetic Waves and Applications, Vol. 30, No. 4, 523-535, 2016.
19. Szabo, Z., G. H. Park, R. Hedge, and E. P. Li, "A unique extraction of metamaterial parameters based on Kramers-Kronig relationship," IEEE Transactions on Microwave Theory and Techniques, Vol. 58, No. 10, 2646-2653, October 2010.
20. Bayatpur, F. and K. Sarabandi, "Tuning performance of metamaterial-based frequency selective surfaces," IEEE Transactions on Antennas and Propagation, Vol. 57, No. 2, February 2009.