Coaxial transmission line for terahertz wave guiding

Wei Xiong; Wen-feng Sun; Xin-ke Wang; Xue Wu; Yan Zhang

doi:10.1117/12.900926

11 August 2011 Coaxial transmission line for terahertz wave guiding

Wei Xiong, Wen-feng Sun, Xin-ke Wang, Xue Wu, Yan Zhang

Proceedings Volume 8195, International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications; 81951H (2011) https://doi.org/10.1117/12.900926
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

We study a coaxial terahertz waveguide with low transmission loss and broad bandwidth. The coaxial transmission line is composed of an aurum line in the center, which ento-ectad covered with Teflon layer, wire-mesh, and the dielectric layer for protection. In this paper, we utilize the finite element method (FEM) to numerically analyze the transmission mode, the attenuation constant, and the bandwidth of the waveguide. The major transmission properties of the coaxial terahertz waveguide are calculated for different diameters of aurum axes and different thicknesses of dielectric layers. We also compare two waveguides with different Teflon thicknesses for getting broader transmission bandwidth. The simulation results indicate that the optimum dimension of coaxial terahertz waveguide is the aurum axes of 700μm diameter, the Teflon of 900μm thickness. With these parameters, the average attenuation constant of the waveguide can be as low as 2.44 x 10^-4 dB/m in the frequency range 1.0^-2.2THz. As these excellent transmission properties and simple structure of the coaxial waveguide, it can be expected that it will be widely used in terahertz wave communications and the fabrication of terahertz system integration.

Citation Download Citation

Wei Xiong, Wen-feng Sun, Xin-ke Wang, Xue Wu, and Yan Zhang "Coaxial transmission line for terahertz wave guiding", Proc. SPIE 8195, International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications, 81951H (11 August 2011); https://doi.org/10.1117/12.900926

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KEYWORDS

Waveguides

Terahertz radiation

Signal attenuation

Dielectrics

Finite element methods

Refractive index

Metals

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