ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Study on dispersion characteristics of terahertz waves in helical waveguides |
Jin-Hai Sun(孙金海)1, †, Shao-Hua Zhang(张少华)2, Xu-Tao Zhang(张旭涛)1, He Cai(蔡禾)1, Yong-Qiang Liu(刘永强)1, and Zeng-Ming Chao(巢增明)1$ |
1 Science and Technology on Electromagnetic Scattering Laboratory, Beijing 100854, China 2 China Aerospace System Engineering Corporation, Beijing 100070, China |
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Abstract Corresponding to the atmospheric transmission windows of the electromagnetic spectrum in the low terahertz range, the mode coupling and dispersion characteristics of two helically corrugated waveguides (HCW) in the frequency ranges of 90 GHz–100 GHz and 260 GHz–265 GHz are studied. Through analytic calculations and numerical simulations, dispersion curves and structural parameters of the two frequency ranges waveguides are obtained. A novel method was proposed to obtain the dispersion of the HCW from the eigenwave solution using a periodic boundary condition. The HCW in a frequency range of 90 GHz–100 GHz was fabricated and its dispersion performance was measured. By comparing the measured results with the theoretical and the simulated results, the validity of the analytical and simulation method is verified. Limited to our machining capability, the dispersion of the 260 GHz–265 GHz HCW was only simulated and calculated and it was found that the results agree well with each other.
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Received: 28 May 2020
Revised: 22 June 2020
Accepted manuscript online: 29 June 2020
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Corresponding Authors:
†Corresponding author. E-mail: jinhaisun@126.com
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Cite this article:
Jin-Hai Sun(孙金海), Shao-Hua Zhang(张少华), Xu-Tao Zhang(张旭涛), He Cai(蔡禾), Yong-Qiang Liu(刘永强), and Zeng-Ming Chao(巢增明)$ Study on dispersion characteristics of terahertz waves in helical waveguides 2020 Chin. Phys. B 29 114301
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