A novel wide-beamwidth rectangular dielectric resonator antenna (DRA) is proposed. By loading two pairs of higher-permittivity dielectric slabs symmetrically on two opposite surfaces of the rectangular DRA in one direction parallel to the feeding slot, the E-plane radiations from two opposite surfaces of the DRA are restrained. Dimensions and the relative permittivity of the dielectric slabs are adjusted, and the E-plane beamwidths of the DRA are expanded. Moreover, two sides of the metal ground plane in another direction perpendicular to the feeding slot are folded down, and the H-plane beamwidths are broadened. In order to verify the design feasibility and explain the operating principle, a wide-beamwidth rectangular DRA with $\text{TE}_{113}^y$ mode is designed and manufactured. Measured results indicate that its maximum half power beamwidths in E-plane and H-plane are 210° and 137°, respectively, while its gains are over 2.2 dBi throughout the usable bandwidth from 3.02 to 3.26 GHz (7.6%).

中文翻译：

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带有高介电常数介电板的宽波束介电谐振器天线

提出了一种新型宽波束矩形介质谐振器天线（DRA）。通过在平行于馈电槽的一个方向上在矩形DRA的两个相对表面上对称加载两对高介电常数介电板，抑制来自DRA两个相对表面的E面辐射。调整介质板的尺寸和相对介电常数，并扩展 DRA 的 E 平面波束宽度。此外，垂直于馈电槽的另一个方向的金属地平面的两侧向下折叠，并且加宽H平面波束宽度。为了验证设计的可行性和解释工作原理，设计并制造了一个具有$\text{TE}_{113}^y$模式的宽波束矩形DRA。