Design of Beamforming Phased Array Antenna for 5G Communication

In this paper, a 2×4 beamforming phase-shifting antenna array is designed for the Sub-6 GHz N77 (3.3 GHz4.2 GHz) frequency band. The array consists of 8 square FR4 material antennas connected by feed lines and 44-bit digital phase shifters. From the analysis results of the network analyzer, it can be seen that when the center frequency is 4GHz, the return loss is -14.36dB, which is lower than the standard threshold of -10dB. When the main beam angle is offset by 15°, the maximum gain is 8.03 dB; when the main beam angle is offset by -15°, the maximum gain is 7.25 dB.