一种用于去除行波管慢波结构有限元仿真中产生的伪直流模式的新方法

摘要

提出了一种用于去除行波管慢波结构有限元仿真中产生的伪直流模式的新方法.该方法基于高阶叠层基函数.不仅可以应用于标准周期边界条件还可以应用于旋转周期边界条件.使用该方法后可以得到一个稳定.精确、高效的慢波结构本征求解器.这个求解器相对于其他商业软件在仿真行波管慢波结构时对内存的需求以及计算时间都大幅地降低.%A convenient and efficient approach for removing the spurious DC modes in finite-element solutions for modeling traveling-wave tubes is proposed. This method is based on higher-order hierarchical basis functions-and is able to deal with both standard and rotated periodic boundary conditions. Application of this approach results in a robust, accurate and efficient eigensolver for slow-wave structures which significantly reduces the required memory and computational time.