期刊名称：International Journal on Electrical Engineering and Informatics
印刷版ISSN：2085-6830
出版年度：2013
卷号：5
期号：3
出版社：School of Electrical Engineering and Informatics
摘要：In this paper, the transmission loss reduction for circular terahertz waveguide is investigated using dielectric-lined method. As is well known, the guided terahertz radiation suffers from high transmission loss due to the increase of ohmic loss and the lack of dielectric materials which has sufficiently transparency. As the existence of transmission loss, the quality of communication is therefore affected thoroughly. Here, the modification of hollow circular metallic terahertz waveguide by coating the inner surface of waveguide walls using some dielectric material, i.e. polystyrene, called as dielectric-lined method is proposed to reduce the transmission loss. The investigation is performed at THz frequencies from 0.1THz to 1.0THz including the analysis of transmission loss for each resonance mode and frequency band. The result shows that the proposed method with 15μm thickness of polystyrene coating is successfully decreasing the transmission loss for the TE01wave mode below 1dB/m with smaller amplitude of electric field around the inner surface of waveguide walls. Furthermore, the discussion of investigation results for diameter variation and different thicknesses of polystyrene coating is also presented.
