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 dB、3 dB轴比和30dB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 beamis designed and fabricated. The antenna is coupled by improved orthogonal unequal length slots and radiates through a surface-inclined high permittivity dielectric resonator. By optimizing the angle of surface inclination and parameters of slots structure, the antenna has a wideband and a circularly polarized tilted beam. Simulated results show that a bandwidth of 18. 2% (for S11 <-10 dB,AR<3 dB and tilted beam of 30 dB) is achieved. Meanwhile, the low profile of 0. 165λis realized, due to the high permittivity dielectric resonator. Measured results show a reasonable agreement with simulation and verify the validity of the design.