缺口圆环激励的圆极化陶瓷介质谐振器天线

Circularly-Polarized Ceramics Dielectric Resonator Antenna Excited by Gapped Annular Slot

提出一种用陶瓷介质谐振器实现圆极化工作的方法,并进行分析和讨论.利用缺口圆环口径耦合引入的微扰来实现圆极化,有效地克服了普通圆极化设计的馈电网络复杂等缺点.通过缺口大小的改变,得出了反射损耗和轴比的变化规律,并通过在谐振器上加2个对称的小贴片来改进天线的性能.此天线工作在5.20 GHz,可应用于通信公共频段,并且采用了高介电常数的介质谐振器,使天线达到小型化.

An approach for circular polarization （CP） operation of ceramics dielectric resonator antenna is proposed with analysis and discussion. The antenna uses a gapped annular slot to realize CP radiation, which reduces complexity of feed network in ordinary CP designs. By changing the gap size, a variation of S11 and the axial ratio are studied. Moreover, by adding two small symmetric patches to the resonator, performance of the antenna is further improved. This antenna operates at 5.20 GHz in the public communication band. High dielectric resonator （DR） is used to make the antenna small.