Arranjo de Antenas de Banda Tripla para ERBs 5G NR operando em FR1 e FR2

Abstract

This Thesis reports on the development of a novel triband base station (BTS) antenna array for the two fifth generation 5G New Radio (5G NR) frequency ranges, i.e., frequency range 1 (FR1) and frequency range 2 (FR2). The proposed array combines three different dipole-shaped antenna subarrays, one designed for FR2 and two for FR1, aiming sectorial coverage, multiple-input-multiple-output (MIMO), and massive MIMO applications. Particularly, a total of 98 radiating elements implies in 80, 16, and 2 antenna array elements for the 26 GHz band (N258 bands), 3.5 GHz band (N77 and N78 bands) and sub-GHz band (N20 and N28 bands), respectively. Experimental results, in accordance to ANSYS HFSS numerical simulations, demonstrate dualpolarization feature and the following bandwidths: 0.65-0.88, 2.76-4.2, and 24.9-27.8 GHz. Regarding the array radiation pattern and MIMO figures of merit, the coupling among the array adjacent elements is kept lower than -20 dB and envelope correlation coefficient below 0.005. Furthermore, all the array elements provide a beamwidth of approximately 60 °, cross polarization lower than -20 dB and gain from 7 to 9.7 dBi over the 5G bands.