Multiwave interaction formulation of a coaxial Bragg structure and its experimental verification

作者：Lai Ying Xin^*; Zhang Shi Chang

来源：Physics of Plasmas, 2007, 14(11): 113301.

DOI：10.1063/1.2803767

A multiwave interaction formulation of coaxial Bragg structure with either one or both of the conductors sinusoidally corrugated is presented to describe all the forward and backward waves of various propagating modes within the structure. The validity of the formulation is examined in terms of the reported experiments, and good agreement of the theoretical results with the experimental measurements is demonstrated. Comparison of the present formulation with the previous two-wave interaction treatment shows substantial difference, and confirms the significance of the multiwave interaction formulation presented in this paper. Based on the multiwave interaction formulation, interesting information is revealed that a higher-order mode (such as TE(6,1)) operation at a frequency of hundreds of gigahertz in a coaxial Bragg reflector can be achieved due to the suppression of spurious modes. This peculiarity provides potential application in constructing a high-Q coaxial Bragg resonator for a high-power cyclotron autoresonance maser or a free-electron laser oscillator in the millimeter and submillimeter wave ranges.

• 出版日期2007-11
• 单位西南交通大学