Transmission characteristics of dielectric-coated metallic waveguides in G band and 4.3THz
Received:July 27, 2018  Revised:March 22, 2019  download
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Author NameAffiliationE-mail
ZHANG Xue-Wen School of Information Science and Engineering,Key Laboratory of EMW Information MoE,Fudan University 17210720180@fudan.edu.cn 
TAN Zhi-Yong Key Laboratory of Terahertz Solid-State Technology,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences  
CHEN Ke-Wang School of Information Science and Engineering,Key Laboratory of EMW Information MoE,Fudan University  
LI Wei-Xuan School of Information Science and Engineering,Key Laboratory of EMW Information MoE,Fudan University  
ZHAO Ze-Qiao School of Information Science and Engineering,Key Laboratory of EMW Information MoE,Fudan University  
YU Shu-Yuan School of Information Science and Engineering,Key Laboratory of EMW Information MoE,Fudan University  
ZHU Xiao-Song School of Information Science and Engineering,Key Laboratory of EMW Information MoE,Fudan University  
CAO Jun-Cheng Key Laboratory of Terahertz Solid-State Technology,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences  
SHI Yi-Wei School of Information Science and Engineering,Key Laboratory of EMW Information MoE,Fudan University ywshi@fudan.edu.cn 
Abstract:Big-bore and flexible dielectric-coated metallic waveguides were fabricated with various dielectric film thicknesses. Transmission characteristics were measured for the metallic waveguides and dielectric-coated metallic waveguides in G band, 4.3 THz, and mid-infrared regions. Measured results show that waveguide loss in G band increases with the increase of dielectric film thickness. Loss for the 2.6 mm-bore metallic waveguide was 2.1 dB/m at the frequency of 160 GHz and the additional loss caused by bending for the waveguide is small. Waveguide loss at 4.3 THz decreases with the increase of dielectric film thickness. And the additional loss caused by bending for the dielectric-coated metallic waveguide decreases with the increase of dielectric film thickness. Loss for the 3.6 mm-bore dielectric-coated metallic waveguide with 1.2 ?m dielectric film thickness is 2.84 dB/m. Measured beam profiles show that energy is more concentrated in the low-order transmission mode as the film thickness increases.
keywords:fiber optics  dielectric-coated metallic waveguide  G band  terahertz  transmission loss
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Copyright:《Journal of Infrared And Millimeter Waves》