A 20-GHz 4.8-dB NF low noise amplifier

A 20-GHz low noise amplifier (LNA) is designed in 0.13μm CMOS technology. The proposed amplifier employs two cascade stages to achieve a peak power-gain of 25 dB and a noise figure of 4.8 dB at 20.4 GHz. The power consumption of the LNA circuit is 12.2 mW from a 1.5V supply. This paper also presents a novel model for sub-nH planar spiral inductors, which accounts for high-frequency effects and incorporates interconnection lines in the 1.5-turn spiral inductor. The new model demonstrates a good agreement with S-parameter from electromagnetic field simulator within 40GHz.