An optimum inductive matched cascode LNA in 60GHz-band

This paper presents an optimum interstage matching inductor of a cascode amplifier by formulation, for the first time. The formulation clarifies capacitances of FETs which degrade a gain of the cascode amplifier. The inductive matched cascode LNA fabricated by 90nm CMOS performs 25.6 dB gain with NF of 6 dB and output P1dB of −2.3 dBm at 60GHz while consuming 26.9 mW.