On the basis of mode conversion theory, this paper further optimized a better dimension and obtained the regulation about the radius of the circular waveguides, curvature and frequency of bent circular waveguides and the bandwidth.

• 在模式耦合理论的基础上 ,优化出了比较好的几何结构 ,并发现了圆波导半径、弯曲圆波导曲率和频率以及频带宽度之间的变化规律。