1. Analysis of the Photonic Bandgaps for Gyrotron Devices.
- Author
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Zhang, Yanyan, Yu, Sheng, Zhang, Liang, Zhang, Tianzhong, Yang, Youwei, and Li, Hongfu
- Subjects
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BAND gaps , *PHOTONICS research , *GYROTRONS , *ELECTROMAGNETIC wave propagation , *PHOTONIC crystals - 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 \mathrm {\mathbf {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. [ABSTRACT FROM PUBLISHER]
- Published
- 2015
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