适用于毫米波带状束行波放大器的光子晶体栅慢波电路研究

提出了一种适用于毫米波及THz波行波放大器的光子晶体栅慢波电路,即横向分布光子晶体栅慢波电路,并提出了分析和设计此类光子晶体栅慢波电路的方法.通过计算光子晶体TE极化的带隙和在带隙内将光子晶体栅慢波电路等效为矩形栅波导慢波电路,从而,光子晶体栅慢波电路的设计得以分为两步独立进行,从而简化了光子晶体栅慢波电路的设计.对横向分布光子晶体栅慢波电路进行了设计和计算,结果表明,与矩形栅波导慢波电路相比,横向分布光子晶体栅慢波电路可以降低工作电压并增加带宽,从而可以降低成本. 关键词： 行波放大器 光子晶体 毫米波 慢波电路

Study on photonic crystal grating slow-wave circuits for millimeter-wave ribbon-beam traveling wave tubes

A kind of photonic crystal grating slow-wave circuit, namely the cross-section distributing two-dimensional photonic crystal slow-wave circuit (CD2DPhSWC), was proposed. And the way of designing CD2DPhSWC was put forward. To simply the design, the process was realized in two steps, firstly the calculation of the photonic band gap (PBG) for the TE polarization, and then the dispersion of the equivalent rectangular waveguide grating. The numerical results show that the bandwidth of the traveling wave tubes (TWTs) based on CS2DPhSWC is wider, and the operating voltage is lower, than that of the rectangular waveguide grating. Correspondingly, the cost of the TWTs is reduced.