基于功分移相器结构的极化捷变天线

Polarization-agile antenna based on the power-divider-phase-shifter

基于功分移相器,提出了一种新的极化捷变天线结构.该结构利用功分移相器对矩形贴片天线进行馈电,在保证两端口等幅输出的同时,可以实现端口相差90°/-90°的快速切换,从而实现对该贴片天线双圆极化辐射的极化捷变控制.与由分立的功分器和移相器进行馈电的传统极化捷变天线相比,该极化捷变天线具有极化纯度高、控制电路简单等优点.

A new structure for the polarization-agile antenna was presented based on the power-dividerphase-shifter.By using the power-divider-phase-shifter,two equal-amplitude signals with +90°/-90°switched phase shift at two output ports can be achieved,which can be used to realize a dual-circular polarized polarization-agile antenna.Compared with traditional polarization-agile antenna which use an independent power divider and phase shifter,the new polarization-agile antenna has the advantage of high polarization purity and simple control circuits,etc.