微带天线相位中心调整方法的研究

Research about the method of adjust the phase center of a microstrip antenna

分析了矩形微带天线的辐射原理,采用传输线法对矩形微带天线进行建模并推导出天线辐射方向图的计算公式和相位中心的计算方法。在此基础上,通过对开槽矩形微带天线的物理建模和远场辐射计算公式的推导,得出影响开槽矩形微带天线相位中心的参数。电磁场仿真结果表明,相对于标准矩形微带天线,通过调整开槽矩形微带天线的开槽长度、宽度及位置,可实现天线相位中心的有效调整,适用于非规则阵列中的阵元设计,具备一定指导性和实用性。

In this paper,we analyze the radiation principle of microstrip antenna,and deduce the formula of the antenna directional pattern and the phase center by using transmission line model.Based on this,We found the parameter that affect the phase center of the antenna by model the slotted rectangle microstrip antenna and deduce the far-field radiation formula.The simulation shows that compared with the rectangle microstrip antenna,we can adjust the phase center of the slotted rectangle microstrip antenna by change the length,width and position of the slot.It’s suitable for the design of antenna array,and has practicability.