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International Journal of Antennas and Propagation
Volume 2019, Article ID 8513150, 10 pages
Research Article

Determining the Effective Electromagnetic Parameters of Photonic Crystal by Phase Unwrapping and Denoising Method

1School of Information and Communication Engineering, Communication University of China, Beijing 100024, China
2Science and Technology on Electromagnetic Scattering Laboratory, Beijing 100854, China

Correspondence should be addressed to Guizhen Lu; nc.ude.cuc@nehziugul

Received 29 March 2019; Accepted 22 May 2019; Published 3 July 2019

Academic Editor: Giuseppe Castaldi

Copyright © 2019 Guizhen Lu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The electromagnetic parameters of the dispersion material and metamaterial are vital in the engineering. The phase unwrapping method is proposed to deal with the phase ambiguity of the transmission and reflection method in electromagnetic (EM) parameters extraction. The computed results demonstrate that the proposed method can give the correct effective parameters. In dealing with scattering parameters with noise, the wavelet transform method is utilized to remove the noise added to the scattering parameters. The simulated results show that the correct material parameters can be obtained by wavelet denoising method. Finally, the proposed method is used to extract the parameters of the photonic crystal. The effective parameter gives a different aspect in explanation to the function for the photonic crystal.