模式匹配法计算圆锥喇叭的辐射场

Calculation of Fields Radiated from Conical Horn by Using Mode-Matching Method

本文利用球坐标系统中的本征函数的展开，用矢量波函数的迭加来表示喇叭内和喇叭外的场分布，运用模式匹配法分析喇叭口和自由空间之间的不连续性问题，引入散射矩阵计算模式幅值，并考虑收敛特性。

The eigenfunctions of spherical coordinates are used to define the fields which exist inside and outside the horn aperture respectively.The mode matching technique is used for analysing the transitions from horn antanna to free space.The discontinuities caused by the transitions from horn to free space are taken into account.The scattering matrices are used to describe the mode coupling at the transitions,and the numerical convergence is considered as well.