Analysis of the photonic bandgaps for gyrotron devices

Zhang, Yanyan and Yu, Sheng and Zhang, Liang and Zhang, Tianzhong and Yang, Youwei and Li, Hongfu (2015) Analysis of the photonic bandgaps for gyrotron devices. IEEE Transactions on Plasma Science, 43 (4). pp. 1018-1023. ISSN 0093-3813

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    Abstract

    The global bandgaps of photonic crystal are theoretically analyzed in this paper. The electromagnetic-wave propagation characteristics of photonic bandgap (PBG) structures, which is used in the the millimeter-wave, submillimeter-wave, and terahertz regime vacuum electronic devices and accelerators, were numerically simulated using the finite-element method software high-frequency structural simulator. The dispersion curves of the lattices in different rod radius to-rod spacing ratios and the global bandgaps for the general 2-D PBG structures formed by triangular and square arrays of metal rods were simulated. A mode map that shows the relationship between the structures and the contained modes was plotted and a 220-GHz metallic PBG resonator operating in TE _{math\rm {math\bf {04}}} mode was designed for a gyrotron device to verify the theoretical and numerical simulations, and a comparison of mode density and quality factor between the PBG resonator and the equivalent cylindrical resonator has been carried out.

    ORCID iDs

    Zhang, Yanyan, Yu, Sheng, Zhang, Liang ORCID logoORCID: https://orcid.org/0000-0002-6317-0395, Zhang, Tianzhong, Yang, Youwei and Li, Hongfu;