volume | PIER Journals

Abstract

In this paper, the development and design of angle independent Metamaterial Microwave Absorbers (MMAs) are presented. The unit cell consists of four trapezoids that are linked by consolidated resistors with the coextensive squares. The absorber is built on a dielectric substrate (FR4) with a thickness of 0.256 mm (λ/144) and a dielectric constant of 4.3. The wideband absorption is acquired in the range of 2.21 to 6.61 GHz with a wide band of 4.40 GHz with absorptivity above 90%. In the area of interest, a flat band is obtained, and to examine the current distribution and electric field in the respective region two peaks are considered at a frequency of 2.49 and 5.68 GHz, with maximum absorptivity of 92.50% and 92.14% respectively. The presented absorber is examined under different angles for phi and theta variation. From the phi variation, it is observed that for all the angles absorptivity does not vary which confirms that the absorber acts as an angle independent. The fabricated sheet consists of an array of a unit cell, which is examined inside an anechoic chamber with the help of two horn antennas and VNA. The tested and simulated results are compared, and it was observed that they are in close agreement. At last, the presented and already reported MMAs are compared, and it is observed that the presented one operates for the low frequency with higher bandwidth. The presented absorber can be practically used for defense applications for Radar Cross Sections (RCS) reduction.

1. Metamaterials, E., Transmission Line Theory and Microwave Applications, The Engineering Approach, C. Caloz, T. Itoh, 1, A John Wiley Sons Inc. Publication, 2005.

2. Schurig, D. R. S. D., J. J. Mock, and D. R. Smith, "Electric-field-coupled resonators for negative permittivity metamaterials," Applied Physics Letters, Vol. 88, No. 4, 041109, 2006.
doi:10.1063/1.2166681

3. Smith, D. R., W. J. Padilla, D. C. Vier, S. C. Nemat-Nasser, and S. Schultz, "Composite medium with simultaneously negative permeability and permittivity," Physical Review Letters, Vol. 84, No. 18, 4184, 2000.
doi:10.1103/PhysRevLett.84.4184

4. Mishra, N., K. Kumari, and R. K. Chaudhary, "An ultra-thin polarization independent quad-band microwave absorber-based on compact metamaterial structures for EMI/EMC applications," International Journal of Microwave and Wireless Technologies, Vol. 10, No. 4, 422-429, 2018.
doi:10.1017/S1759078718000491

5. Grbic, A. and G. V. Eleftheriades, "Experimental verification of backward-wave radiation from a negative refractive index metamaterial," Journal of Applied Physics, Vol. 92, No. 10, 5930-5935, 2002.
doi:10.1063/1.1513194

6. Lee, S. H., C. M. Park, Y. M. Seo, and C. K. Kim, "Reversed Doppler effect in double negative metamaterials," Physical Review B, Vol. 81, No. 24, 241102, 2010.
doi:10.1103/PhysRevB.81.241102

7. Roy, K. and R. Sinha, "Miniaturized omni-directional ZOR antenna with its co-equal circuit for 5G applications," Microsystem Technologies, Vol. 28, No. 11, 2499-2509, 2022.
doi:10.1007/s00542-022-05384-8

8. Cai, W., U. K. Chettiar, A. V. Kildishev, and V. M. Shalaev, "Optical cloaking with metamaterials," Nature Photonics, Vol. 1, No. 4, 224-227, 2007.
doi:10.1038/nphoton.2007.28

9. Yang, J. J., M. Huang, H. Tang, J. Zeng, and L. Dong, "Metamaterial sensors," International Journal of Antennas and Propagation, 2013.

10. Dong, Y. and T. Itoh, "Metamaterial-based antennas," Proceedings of the IEEE, Vol. 100, No. 7, 2271-2285, 2012.
doi:10.1109/JPROC.2012.2187631

11. Mishra, N. and R. K. Chaudhary, "Design and development of an ultrathin triple band microwave absorber using miniaturized metamaterial structure for near-unity absorption characteristics," Progress In Electromagnetics Research C, Vol. 94, 89-101, 2019.
doi:10.2528/PIERC19043002

12. Roy, K., C. Barde, P. Ranjan, R. Sinha, and D. Das, "A wide angle polarization insensitive multi-band metamaterial absorber for L, C, S and X band applications," Multimedia Tools and Applications, 1-13, 2022.

13. Mishra, N., D. K. Choudhary, R. Chowdhury, K. Kumari, and R. K. Chaudhary, "An investigation on compact ultra-thin triple band polarization independent metamaterial absorber for microwave frequency applications," IEEE Access, Vol. 5, 4370-4376, 2017.
doi:10.1109/ACCESS.2017.2675439

14. Roy, K., R. Sinha, and C. Barde, "Linear-to-linear polarization conversion using metasurface for X, Ku and K band applications," Frequenz, Vol. 76, No. 7-8, 461-470, 2022.
doi:10.1515/freq-2021-0204

15. Chin, J. Y., M. Lu, and T. J. Cui, "Metamaterial polarizers by electric-field-coupled resonators," Applied Physics Letters, Vol. 93, No. 25, 251903, 2008.
doi:10.1063/1.3054161

16. Ranjan, P., A. Choubey, and S. K. Mahto, "Wide-angle polarization independent multilayer microwave absorber using wind driven optimization technique," International Journal of Applied Engineering Research, Vol. 12, No. 19, 8016-8025, 2017.

17. Landy, N. I., S. Sajuyigbe, J. J. Mock, D. R. Smith, and W. J. Padilla, "Perfect metamaterial absorber," Physical Review Letters, Vol. 100, No. 20, 207402, 2008.
doi:10.1103/PhysRevLett.100.207402

18. Baqir, M. A., M. Ghasemi, P. K. Choudhury, and B. Y. Majlis, "Design and analysis of nanostructured subwavelength metamaterial absorber operating in the UV and visible spectral range," Journal of Electromagnetic Waves and Applications, Vol. 29, No. 18, 2408-2419, 2015.
doi:10.1080/09205071.2015.1073124

19. Li, H., L. H. Yuan, B. Zhou, X. P. Shen, Q. Cheng, and T. J. Cui, "Ultrathin multiband gigahertz metamaterial absorbers," Journal of Applied Physics, Vol. 110, No. 1, 014909, 2011.
doi:10.1063/1.3608246

20. Cheng, Y.-Z., R.-Z. Gong, Y. Nie, and X. Wang, "A wideband metamaterial absorber based on a magnetic resonator loaded with lumped resistors," Chinese Physics B, Vol. 21, No. 12, 127801, 2012.
doi:10.1088/1674-1056/21/12/127801

21. Ayop, O., M. K. A. Rahim, N. A. Murad, and N. A. Samsuri, "Wideband polarization-insensitive metamaterial absorber with perfect dual resonances," Applied Physics A, Vol. 122, No. 4, 316, 2016.
doi:10.1007/s00339-016-9897-x

Dr. Goriparthi Rajyalakshmi

Dr. Yada Ravi Kumar

Dr. Dasari Ramakrishna

Dr. Kumbha Sambasiva Rao