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Home > Archive>Volume 38, Issue 2, 2019 >215-222. DOI:10.11972/j.issn.1001-9014.2019.02.015
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Transmission characteristics of dielectric-coated metallic waveguides in G band and 4.3THz
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Supported by Science and Technology Commission of the Military Commission

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    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.

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ZHANG Xue-Wen, TAN Zhi-Yong, CHEN Ke-Wang, LI Wei-Xuan, ZHAO Ze-Qiao, YU Shu-Yuan, ZHU Xiao-Song, CAO Jun-Cheng, SHI Yi-Wei. Transmission characteristics of dielectric-coated metallic waveguides in G band and 4.3THz[J]. Journal of Infrared and Millimeter Waves,2019,38(2):215~222

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History
  • Received:July 27,2018
  • Revised:March 22,2019
  • Adopted:October 10,2018
  • Online: May 08,2019
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