A 21GHz Bandwidth 30dB Gain VGA for 6G Baseband Systems in 22nm FDSOI

This paper presents a 5-stage wideband variable gain amplifier (VGA) integrated in 22nm fully-depleted silicon-on-insulator (FDSOI) CMOS technology. The circuit comprises three different core circuit topologies composed of an input buffer, three gain control stages, and a high-power output stage. The VGA achieves a 30dB gain with a power consumption of 44mW, exhibiting a continuous tuning range of 33dB, covering a 3dB bandwidth of 21GHz while occupying an area of 0.077mm². The VGA is optimized for operation within high-data rate 6G receiver systems.