Vol. 74

Front:[PDF file] Back:[PDF file]
Latest Volume
All Volumes
All Issues

Frequency Tunable Low Cost Microwave Absorber for EMI/EMC Application

By Gobinda Sen and Santanu Das
Progress In Electromagnetics Research Letters, Vol. 74, 47-52, 2018


A frequency tunable multi-layer low cost microwave absorber is proposed for Ku and X bands of applications. The tunability is obtained with the cavity model design using two metallic layers; a frequency selective surface (FSS) layer and a metal backed substrate layer with the air gap between them. The change in air-gap results in variation of the effective substrate height, and as a consequences the resonant frequency is tuned. The coupling of LC resonance and cavity resonance at an air-gap of 7.5 mm results in a dual-band absorption of the design. The proposed absorber performance has been analyzed for both TE and TM polarizations of incident wave, and the results are found to be same. The studies on surface current distribution and incident angle variation are observed to get physical insight behind absorption. The waveguide measurement method is used to correlate the simulated results with the measured one. With this simple cost efficient design, the absorber appears well suited for EMI/ EMC application at X and Ku bands.


Gobinda Sen and Santanu Das, "Frequency Tunable Low Cost Microwave Absorber for EMI/EMC Application," Progress In Electromagnetics Research Letters, Vol. 74, 47-52, 2018.


    1. 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.

    2. Rufangura, P. and C. Sabah, "Polarisation insensitive tunable metamaterial perfect absorber for solar cells applications," IET Optoelectronics, Vol. 10, No. 6, 12, 2016.

    3. Grant, J., et al., "Polarization-insensitive terahertz metamaterial absorber," Opt. Lett., Vol. 36, No. 8, April 2011.

    4. Zhu, W. and X. Zhao, "Metamaterial absorber with dendritic cells at infrared frequencies," J. Opt. Soc. Amer. B, Vol. 26, No. 26, 2382-2385, December 2009.

    5. Gong, Y., et al., "Highly flexible all-optical metamaterial absorption switching assisted by Kerrnonlinear effect," Opt. Express, Vol. 19, No. 11, 10193-10198, 2011.

    6. Zhai, H., et al., "A new tunable dual-band metamaterial absorber with wide-angle TE and TM polarization stability," Journal of Electromagnetic Waves and Applications, Vol. 29, No. 6, 774-785, 2015.

    7. Wang, B. X., L. L. Wang, G. Z. Wang, W. Q. Huang, X. F. Li, and X. Zhai, "Frequency continuous tunable terahertz metamaterial absorber," J. Lighwave Technol., Vol. 32, 1183-1189, 2014.

    8. Zhao, J., Q. Cheng, J. Chen, M. Q. Qi, W. X. Jiang, and T. J. Cui, "A tunable metamaterial absorber using varactor diodes," New J. Phys., Vol. 15, 043049, 2013.

    9. Lin, B. Q., S. H. Zhao, W. Wei, X. Y. Da, Q. R. Zheng, H. Y. Zhang, and M. Zhu, "Design of a tunable frequency selective surface absorber as a loaded receiving antenna array," Chin. Phys. B, Vol. 23, 024201, 2014.

    10. Zheng, H. Y., X. R. Jin, J. W. Park, Y. H. Lu, J. Y. Rhee, W. H. Jang, H. Cheong, and Y. P. Lee, "Tunable dual-band perfect absorbers based on extraordinary optical transmission and Fabry-Perot cavity resonance," Opt. Express, Vol. 20, 24002-24009, 2012.

    11. Chen, J., Z. Hu, G. Wang, X. Huang, S. Wang, X. Hu, and M. Liu, "High-impedance surface-based broadband absorbers with interference theory," IEEE Transactions on Antennas and Propagation, Vol. 63, No. 10, 4367-4374, October 2015.

    12. Collin, R. E., Foundations for Microwave Engineering, 2nd Ed., 501, Wiley-IEEE Press, January 2001.

    13. Zhai, H., C. Zhan, L. Liu, and Y. Zang, "Reconfigurable wideband metamaterial absorber with wide angle and polarization stability," Electronics Letters, Vol. 51, No. 21, 1624-1626, October 8, 2015.

    14. You, J. W., J. F. Zhang, W. X. Jiang, H. F. Ma, W. Z. Cui, and T. J. Cui, "Accurate analysis of finite-volume lumped elements in metamaterial absorber design," IEEE Transactions on Microwave Theory and Techniques, Vol. 64, No. 7, 1966-1975, July 2016.

    15. Li, L., Y. Yang, and C. H. Liang, "A wide-angle polarization insensitive ultra-thin metamaterial absorber with three resonant modes," J. Appl. Phys., Vol. 110, 063702, 2011.