套筒式等离子体周期结构电磁特性研究

Research on the Electromagnetic Transmission Properties of Sleeve-Like Plasma Periodic Structure

为分析研究等离子体色散媒质在周期结构中对电磁波的作用机理,设计一种在二维方向上周期排列的内外双层套筒式柱体结构单元,对不同的等离子体密度组合和周期间距下进行仿真分析。结果表明,改变内外层等离子体密度可以有效调节传输频带,且在不改变单元结构的基础上通过便捷开关等离子体激发湮灭状态,进而对单元的周期间距进行间接调控,拓宽了传输频带,体现了等离子体动态重构的可行性,对研究等离子体周期结构具有一定的启发性。

In order to study the mechanism of plasma dispersion medium in the periodic structure on electromagnetic waves, a new two-layered sleeve-like cylinder structure unit was designed consisting of internal and external layers, which could be periodically arranged in the two-dimensional direction. A detailed simulation and analysis were presented under different plasma density combinations and period spacing, which showed the density change of inner and outer layers of plasma could effectively regulate transmission band. And results also exhibited that by conveniently switching on the state of the plasma excitation and annihilation without changing the structure of the base unit, unit periodic spacing could be in- directly regulated, significantly broadening the transmission band. This reflects the feasibility of plasma dynamic reconfigu- ration and can bring some enlightening reference to the study of plasma periodic structure.