Dominant mode characteristics of circular groove guide |
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| Authors: | Hu Chi Yang Hong-sheng Lu Zhong-zuo |
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| Affiliation: | 1. Department of Electronic Engineering National Key Laboratory of Millimeter Waves, Southeast University, 210018, Nanjing, People's Republic of China
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| Abstract: | Circular groove guide is a kind of waveguide for millimeter waves with low loss, large dimensions, and low dispersion. In this paper, the dominant mode characteristics of it is analysed. The technique that mode macthing method combines with point matching method is used to derive the Nth-order characteristic equation of the guide. The 1st order, 2nd order and 3rd order approximate curves that the normalized cutoff wavelength of circular groove guide varies with c/a are given. The attenuation curves are given at 1mm, 1.5mm and 3mm wavelength. The numerical results are in well agreement with the experimental results published. |
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