A 28 GHz 8-channel BFIC for 5G in 28 nm CMOS

This paper presents a 28 GHz 8-channel (in 2-polarization) BFIC for 5G band n257, integrated in a standard 28 nm CMOS technology and packaged in a compact 4.6 by 5.1 mm
²
FCBGA. Each channel achieves 5.6 deg phase resolution and 0.5 dB gain resolution with high accuracy and orthogonality, while offering more than 10 dBm average TX output power and 4.5 dB RX NF per channel.