A Full Monolithic 26GHz LNA with Special Transmission Line and Transformer for 5G Applications in 55nm and 65nm CMOS

This paper presents a three stages single-ended common-source low noise amplifier (LNA) for 5G high-band (24.75GHz-27.5GHz) applications. Combing package parasitics such as bond-wires and bond-pads, special transmission lines and transformers are applied in layout to make layout design flexible and reduce the length of interconnection. This design flow has been proved successfully in two different process platform, 55nm and 65nm CMOS process technologies. The LNA achieves voltage gain above 17dB and over -8.75dBm IIP3 at 26GHz in two process technologies with 3.8dB and 3.65dB noise figure respectively.