Design of Thin RC Absorbers Using a Silver Nanowire Resistive Screen

Title & Authors
Design of Thin RC Absorbers Using a Silver Nanowire Resistive Screen
Lee, Junho; Lee, Bomson;

Abstract
A resistive and capacitive (RC) microwave absorber with a layer thickness less than a quarter of a wavelength is investigated based on closed-form design equations, which are derived from the equivalent circuit of the RC absorber. The RC absorber is shown to have a theoretical 90% absorption bandwidth of 93% when the electrical layer thickness is $\small{57^{\circ}}$ (about $\small{{\lambda}_0/6}$). The trade-offs between the layer thickness and the absorption bandwidth are also elucidated. The presented formulation is validated by a design example at 3 GHz. The RC absorber is realized using a silver nanowire resistive rectangular structure with surrounding gaps. The measured 90% absorption bandwidth with a layer thickness of $\small{{\lambda}_0/8}$ is 76% from 2.3 GHz to 5.1 GHz in accordance with the theory and EM simulations. The presented design methodology is scalable to other frequencies.
Keywords
Absorption Bandwidth;Capacitive Screen;Design Equations;Resistive Sheet;Thin Absorber;
Language
English
Cited by
References
1.
B. K. Chung and H. T. Chuah, "Design and construction of a multipurpose wideband anechoic chamber," IEEE Antennas and Propagation Magazine, vol. 45, no. 6, pp. 41-47, 2003.

2.
A. Kazemzadeh and A. Karlsson, "Capacitive circuit method for fast and efficient design of wideband radar absorbers," IEEE Transactions on Antennas and Propagation, vol. 57, no. 8, pp. 2307-2314, 2009.

3.
J. Tak, Y. Lee, and J. Choi, "Design of a metamaterial absorber for ISM applications," Journal of Electromagnetic Engineering and Science, vol. 13, no. 1, pp. 1-7, 2013.

4.
X. Shen, T. Cui, J. Zhao, H, Ma, W. Jiang, and H. Li, "Polarization independent wide-angle triple-band metamaterial absorber," Optics Express, vol. 19, no. 10, pp. 9401-9407, 2011.

5.
H. Li, 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, article no. 014909, 2011.

6.
R. L. Fante and M. T. McCormack, "Reflection properties of the Salisbury screen," IEEE Transactions on Antennas Propagation, vol. 36, no.10, pp. 1443-1454, 1988.

7.
A. P. Sohrab and Z. Atlasbaf, "A circuit analog absorber with optimum thickness and response in X-band," IEEE Antennas and Wireless Propagation Letters, vol. 12, pp. 276-279, 2013.

8.
G. R. Zhang, P. H. Zhou, H. B. Zhang, L. B. Zhang, J. L. Xie, and L. J. Deng, "Analysis and design of triple-band high-impedance surface absorber with periodic diversified impedance," Journal of Applied Physics, vol. 114, no. 16, article no. 164103, 2013.

9.
B. K. Kim and B. Lee, "Design of metamaterial-inspired wideband absorber at X-band adopting trumpet structures," Journal of Electromagnetic Engineering and Science, vol. 14, no. 3, pp. 314-316, 2014.

10.
G. Kim and B. Lee, "Design of wideband absorbers using RLC screen," Electronics Letters, vol. 51, no. 11, pp. 834-836, 2015.

11.
B. K. Kim, and B. Lee, "Wideband absorber at X-band adoption resistive trumpet structures," Electronics Letters, vol. 50, no. 25, pp. 1957-1959, 2014.

12.
F. Costa, S. Genovesi, A. Monorchio, and G. Manara, "Low-cost metamaterial absorbers for sub-GHz wireless system, " IEEE Antennas and Wireless Propagation Letters, vol. 13, pp. 27-30, 2014.

13.
H. Zhang, P. Zhou, H. Lu, Y. Xu, J. Xie, and L. Deng, "Soft-magnetic-film based metamaterial absorber," Electronics Letters, vol. 48, no. 8, pp. 435-437, 2012.

14.
S. Ghosh and K. V. Srivastava, "An equivalent circuit model of FSS-based metamaterial absorber using coupled line theory," IEEE Antennas and Wireless Propagation Letters, vol. 14, pp. 511-514, 2015.

15.
Y. Cheng, H. Yang, and N. Wu, "Perfect metamaterial absorber based on a split-ring-cross resonator," Applied Physics A, vol. 102, no. 1, pp. 99-103, 2011.