A D-band 23.5dB High Gain 0.8V Low-Power Transformer Matched LNA in 22nm FDSOI CMOS

This work presents a D-band fully differential four-stage common-source low noise amplifier (LNA). The design operates in 110 GHz-140 GHz frequency region, with a 22.4 GHz 3-dB bandwidth, achieving a peak gain of 23.5 dB at 115 GHz with a DC power consumption of 52 mW. It has a noise figure of 7.5dB at 140 GHz and 8.2 dB at 120 GHz. To allow broadband simultaneous matching and biasing, transformer-based interstage matching has been utilized. The design also utilizes back-gate biasing to further increase the linearity and gain of the amplifier.