一种极化可重构的开口环缝微带天线

A Polarization Reconfigurable Opening Annular Slot Micro-Strip Antenna

基于互补开口谐振环的结构设计了一种新型的极化可重构天线。与传统的180°对称开口谐振环不同的是采用90°夹角的开口结构,通过控制开口的状态,能够实现2.6GHz频率的左右圆极化和2.4GHz线极化的转换。当天线左右开关状态不同的时候,天线的结构非对称,可将天线看做变形的开口谐振环,其能够实现圆极化;当天线左右开关都处于开的状态时,天线可以看做是双环缝微带天线,实现线极化。2.6GHz的左右圆极化的3d B轴比带宽为100MHz,-10d B阻抗带宽2.20~2.80GHz(600MHz),2.4GHz线极化的阻抗带宽是2.1~2.55GHz(450MHz),适用于无线移动通信。

A novel polarization reconfigurable antenna,based on the complementary opening reconance loop structure,is proposed in this paper. Different with the traditional 180° symmetric open resonant ring,it is with 90° angle of opening structure. By controlling the opening states,the asymmetric structure can achieve right hand circular polarization( RHCP) or left hand circular polarization( LHCP) at 2. 6GHz,and symmetrical structure get line polarization( LP) transformation at 2. 4GHz. The experimental result shows that the proposed antenna has an impedance bandwidth of 2. 20 ~ 2. 80GHz( 600MHz)and 3d B CP bandwidth of about 100 MHz at CP modes,an impedance bandwidth of 2. 1 ~ 2. 55GHz( 450MHz) at LP mode.This proposed antenna is suitable for wireless mobile communication,etc.