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.
| Original language | English |
|---|---|
| Pages (from-to) | 1018-1023 |
| Number of pages | 6 |
| Journal | IEEE Transactions on Plasma Science |
| Volume | 43 |
| Issue number | 4 |
| Early online date | 6 Apr 2015 |
| DOIs | |
| Publication status | Published - 13 Apr 2015 |
Keywords
- cavity resonator
- gyro-devices
- photonic bandgap (PBG)
- square lattice
- triangular lattice