A 28GHz CMOS Bi-Directional Phased-Array Beamformer for 5G NR Supporting Dual-Polarized MIMO

摘要

This paper presents a 5G CMOS phased-array beamfomer. A proposed neutralized bi-directional technique is utilized in this work, which realizes the improved gain and reverse isolation. The required on-chip area is significantly reduced. In a 1-m over-the-air measurement, an SC data-rate of 15Gb/s/pol. in 64QAM is achieved by the proposed array beamformer. A 2×2 DP-MIMO communication with 5G NR uplink signal in 64QAM can also be supported. A 32H+32V array in this work realizes a saturated EIRP of 45.6dBm.