Design and Analysis of Compound Multilayer Metamaterial Filter in THz Region

Abstract:

A periodic microstructure with dielectric and metal layers is proposed to obtain a bandpass filter. The multilayer microstructure is compounded of ring cross slot and cross slot. The center frequency of the filter is 0.338THz with a 3dB bandwidth of 75.62GHz. The maximum insertion loss in the pass band reaches 0.60dB. The bandedge transitions of the rejection bands are 232dB/THz and 176dB/THz, respectively. Furthermore, the physical mechanism of near field distribution and the influence of two factors (the number of metal layer and dielectric layer) on the passband have been studied. Meanwhile, the frequency response is analyzed for different incident angles and polarizations. The frequency response characteristic is insensitive to the polarization, and a good performance for incident angle of the transmission is obtained. It can be applied to THz atmospheric communication system.

• Periodical: Applied Mechanics and Materials (Volume 872)
• Pages: 293-299
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.872.293
• Online since: October 2017
• Authors: Wu Pan*, Jun Zhang, Xuan Yu, Wei Zeng
• Keywords: Filter, Metamaterials, Passband, Transmission

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