Design of Dielectric Resonator loaded Dual Band Microstrip Antenna for 5G mm-wave Applications

Abstract

In the current day of wireless communication systems, the need for high data rates, good channel capacities, and dependability is always the main area of concern. The 5G mm-wave technology standards are brave enough to offer large device connectivity, low latency communications, and huge data throughput. A dual band mm-wave microstrip antenna based on a Dielectric Resonator (DR) was reported in this communication for 5G NR n-257, n-258, n-259, n-260, and n-261 band applications. The antenna was designed using an octal bowl-shaped dielectric resonator, a modified rectangular patch, and a partial ground plane. The dimensions of the antenna were 15 x 15 x 0.254 mm³.   This antenna was grounded by a 15 x 15 mm² partial ground plane with a 14 x 13 mm² dimensioned wide rectangular slot. The modified rectangular patch was etched on Rogers RT/duroid substrate (dielectric constant 2.2). The AI2_O3_ ceramic dielectric resonator with dielectric constant 9.8 was mounted on patch for high efficient radiation.   Two millimeter-wave bands were resonated in this embedded antenna radiating structure: the first band was 23.21GHz–31.25GHz with a central frequency of 25.44GHz, and the second band was 37.33GHz–44.45GHz with a core frequency of 40.89GHz. The dielectric resonator assisted in increasing the antenna's gain. The greatest gains over the first and second bands are 9.24 dBi and 7.2 dBi, respectively. Over both bands, a radiation effectiveness of greater than 84% was noted.   The suggested antenna's results showed that it could cover the 5G NR n-257, n-258, n-259, n-260, and n-261 bands with a considerable gain and efficiency. Therefore, the antenna is a viable option for 5G mm-wave wireless communication systems.