W-Band Broadband CMOS LNA Using Partially Coupled Transformer and Large Transistor

This letter presents a W-band broadband low-noise amplifier (LNA) that uses a transformer-based input matching network (MN) with a series inductor, which is implemented and verified using 65-nm bulk CMOS technology. The proposed transformer-based input MN not only provides a broadband input matching but simultaneously exhibits low-noise performance. The prototype LNA measures 0.09 mm2 and achieves a peak gain of 16.4 dB and an average noise figure (NF) of 4.32 dB. The measured 3-dB bandwidth (BW) is 19.4 GHz from 68.2 to 87.6 GHz and the IP1dB is −14 dBm with a power consumption of 44.5 mW. Compared to the existing W-band bulk CMOS LNAs, the implemented LNA achieves the low-noise performance and compact size.