具有有限深度环缝的导电屏上单极天线的辐射特性

Radiation Characteristics of a Monopole Mounted on a Conducting Planar Screen Cut with an Annular Slot of Finite Depth

单极天线安装在理想导电平面屏上,屏上刻有有限深度的环形缝。将单极天线上电流及缝和自由空间交界处的等效磁流作为未知函数,建立了一对耦合积分方程。从方程得到电流和磁流的数值解。从这些电流和磁流计算了输入阻抗和辐射方向图。

A monopole is mounted on a perfectly conducting (PEC) planar screen of infinite extent in which an annular slot of finite depth is cut. A pair of coupled integral equations are derived for this configuration. The electric cur- rent on the monopole and the electric field (or equivalent magnetic current) at the interface between the slot and the half space are determined as the solu- tion of these integral equations. The input impedance of the monopole and the far field pattern are computed from these electric current and equivalent magnetic current.