In this paper a triple-band dielectric resonator antenna (DRA) is designed using a 0.8 mm thicker Arlan FR-25 substrate, having relative dielectric constant of 3.58 and loss tangent of 0.0035. The antenna works in three unique frequency bands of 15, 16.3 and 18.5 GHz, lying in the sub-20 GHz spectrum. A stack of ten radiating elements of AR100 material, are installed at the centre of the proposed antenna structure. The DRA is excited through an elliptical aperture in the metallic plane via a 50 Ohm microstrip feed line, etched on the rear side of the Arlan FR-25 substrate. Stacked parasitic elements are incorporated around the central radiating element for achieving enhanced gain. The proposed DRA gives satisfactory gain and fractional bandwidth of (8.06 dB, 12%), (10.7 dB, 3%) and (7.03 dB, 2.73%) at 15, 16.3 and 18.3 GHz bands, respectively. The simulation results of the DRA are compared and validated using three different analysis techniques i.e., FIT (Finite Integration Technique), FDTD (Finite Difference Time Domain) Method and FEM (Finite Element Method). The designed antenna can be used for future fifth generation (5G) systems (15 GHz), internet of things (IoT) based device-to-device (D2D) communication and satellite applications (16.3–18.3 GHz).

在本文中，使用 0.8 mm 厚的 Arlan FR-25 基板设计了三频介质谐振器天线 (DRA)，其相对介电常数为 3.58，损耗角正切为 0.0035。该天线在 15、16.3 和 18.5 GHz 三个独特的频段内工作，位于 20 GHz 以下的频谱中。十个由 AR100 材料制成的辐射元件堆叠安装在提议的天线结构的中心。通过蚀刻在 Arlan FR-25 基板背面的 50 欧姆微带馈线，DRA 通过金属平面中的椭圆孔被激发。围绕中央辐射元件并入堆叠的寄生元件以实现增强的增益。建议的 DRA 分别在 15、16.3 和 18.3 GHz 频段提供了令人满意的增益和分数带宽（8.06 dB，12%）、（10.7 dB，3%）和（7.03 dB，2.73%）。使用三种不同的分析技术，即 FIT（有限积分技术）、FDTD（有限差分时域）方法和 FEM（有限元方法），对 DRA 的模拟结果进行了比较和验证。设计的天线可用于未来的第五代 (5G) 系统 (15 GHz)、基于物联网 (IoT) 的设备到设备 (D2D) 通信和卫星应用 (16.3–18.3 GHz)。