13. A Design of a Dielectric Resonator Antenna for Higher-Order Mode in the Shape of Rectangle for 5G Application

In this paper, the rectangular-shaped dielectric resonator antenna (DRA) operating on higher-order mode for the fifth generation (5G) communication applications is designed and presented. The millimeter-wave band was considered as a potential carrier frequency that is important to be one of the 5G technologies. The millimeter-wave band around 20–300 GHz was chosen to offer a large bandwidth, high gain, and minimum size to support higher data transmission in wireless communication. The proposed DR antenna is excited by using a microstrip feed line and designed at the operating frequency of 28 GHz. The Rogers RT/Duroid 5880 material having a thickness of 0.254 mm and a dielectric constant of 2.2 is used for the substrate. The commercial CST microwave studio (CST MWS) software is used for the optimization and simulation of the antenna design. In this research, the result is based on different dimension of the rectangular-shaped antenna by decreasing 2.9% and 1.1% the value of height and width respectively, but the value length is increased about 3.6% from the benchmark antenna design. The results indicate that the proposed antenna design produced a better performance about in the range of 1.5% to 7.2% in regard to return loss, bandwidth VSWR, gain, and directivity. Thus, the proposed antenna design is suitable for future 5G wireless communication applications.