A new geometry of ultra-wideband (UWB) hollow dielectric resonator antenna (DRA) has been designed, simulated, and fabricated. The antenna consists of a rectangular dielectric resonator and excited by a transformer type microstrip feedline. A hollow cylindrical-shaped structure is extracted from a rectangular DR to improve the gain and impedance bandwidth of the antenna. The present work shows that the shifting within the UWB range along with the gain enhancement is observed by increased diameter of the hollow structure and the use of defective ground structure in the ground plane. The antenna provides four different radiating modes, namely TE_11δ at 3.8 GHz, TE_22δ at 6.4 GHz, TE^Z₂₃₁ at 8.8 GHz, and TE_33δ at 10 GHz that support to give widen impedance bandwidth. The simulated and measured results are in good agreement as an impedance bandwidth of 104.09% (3.28 to 10.4 GHz) and 103.86% along with a peak gain of 7.2 dB.

设计，模拟和制造了一种新的超宽带（UWB）空心介电谐振器天线几何形状。天线由矩形介质谐振器组成，并由变压器型微带馈线激励。从矩形DR中提取空心圆柱状结构，以改善天线的增益和阻抗带宽。本工作表明，通过增加空心结构的直径和在接地平面中使用有缺陷的接地结构，可以观察到UWB范围内的偏移以及增益的提高。天线提供了四种不同的辐射模式，即TE _{11 δ}在3.8千兆赫，TE _{22 δ}在6.4千兆赫，TE ^ž _{23 1} 在8.8千兆赫，和TE_{33 δ}在10GHz的支持给扩大的阻抗带宽。仿真和测量结果非常吻合，阻抗带宽为104.09％（3.28至10.4 GHz）和103.86％，峰值增益为7.2 dB。