A new broadband circularly polarized dielectric resonator antenna (CP DRA) with parasitic elements is presented in this article. The DRA is consisted of a square DR with a pair of rectangular cut corners, two parasitic half-ring DRs, and a square ground plane. A stepped microstrip line is used as the feeding structure by cross-slot aperture coupled way for better impedance matching. Different from the traditional rectangular parasitic metallic plates, a pair of half-ring DRs are introduced as parasitic element to generate additional AR passband in this article. An optimized antenna model is fabricated and tested for verifying the design concept. The tested results indicate the presented antenna features a wide 10-dB impedance bandwidth (IBW) of 52.2% (3.06 GHz, 2.30–3.82 GHz), and a wide 3-dB axial ratio bandwidth (ARBW) of 46.8% (3.08 GHz, 2.36–3.80 GHz).

本文介绍了一种带有寄生元件的新型宽带圆极化介质谐振器天线（CP DRA）。DRA由具有一对矩形切角的方形DR，两个寄生半环DR和一个方形接地平面组成。阶梯式微带线通过交叉缝隙孔耦合方式用作馈电结构，以实现更好的阻抗匹配。与传统的矩形寄生金属板不同，本文引入了一对半环DR作为寄生元件，以产生附加的AR通带。制作并测试了优化的天线模型以验证设计概念。测试结果表明，所展示的天线具有52.2％（3.06 GHz，2.30–3.82 GHz）的10dB宽阻抗带宽（IBW），以及46.8％（3.08 GHz）的3dB轴向比率宽带宽（ARBW）， 2.36–3。