摘要
共焦柱面谐振腔具有功率容量大,模式密度低等优点,并且其品质因数Q值可通过改变镜面宽度得到有效控制。因此,共焦准光谐振腔具有良好的模式选择特性,能够有效的抑制回旋管中的模式竞争。本文利用共焦准光谐振腔作为回旋振荡器的高频结构,设计了一种560GHz三次谐波回旋管,并利用非线性理论对其进行了理论分析。仿真结果表明,当工作电压为60k V,电子束电流为3A时,该管可稳定工作在TE0,17准光模式,峰值功率可达9.4k W。同时设计了一个准光模式变换器将共焦柱面波导的TE0,17模式变换为高斯光束。
引文
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