圆极化倾斜波束介质谐振天线设计  

Circularly Polarized Dielectric Resonator Antenna with a Tilted Beam

作　　者：张昭[1] 曹祥玉[1] 李思佳[1] 

机构地区：[1]空军工程大学信息与导航学院,西安710077

出　　处：《现代雷达》2015年第2期51-54,共4页Modern Radar

摘　　要：基于非对称结构设计思想,以表面倾斜的高介电常数介质谐振器为辐射单元,采用改进的正交不等长缝隙结构耦合馈电,设计制作了一种圆极化倾斜波束介质谐振天线。通过对介质谐振器表面倾斜角度和馈电缝隙的参数优化,扩展了天线的频带宽度,实现了宽频带圆极化倾斜波束辐射。仿真结果表明:天线在同时满足S11<-10 d B、3 d B轴比和30°波束倾斜条件下的带宽为18.2%。同时,由于采用高介电常数介质谐振器,天线剖面高度降低到0.165λ。实测结果和仿真结果吻合较好,验证了该设计的有效性。Based on the asymmetrical structure design concept, a circularly polarized dielectric resonator antenna with a tilted beam is designed and fabricated. The antenna is coupled by improved orthogonal unequal length slots and radiates through a surface-in- clined high permittivity dielectric resonator. By optimizing the angle of surface inclination and parameters of slots structure, the an- tenna has a wideband and a circularly polarized tilted beam. Simulated results show that a bandwidth of 18.2 % （for Sll 〈-10 dB, AR〈3 dB and tilted beam of 30~） is achieved. Meanwhile, the low profile of 0. 165A is realized, due to the high permittivity dielectric resonator. Measured results show a reasonable agreement with simulation and verify the validitY of the design.

关 键 词：介质谐振天线 圆极化 倾斜波束 非对称结构 低剖面 

分 类 号：TN821[电子电信—信息与通信工程]