A 5-dBm IIP3 3.5-mW LNA for 802.11ax Receiver in 40 nm CMOS

This article presents an inductively degenerated common-source low-noise amplifier (LNA) for a 5–6-GHz wireless local area network (LAN) receiver integrated circuit (IC). The LNA is equipped with gain-switching to prevent fast saturation in a presence of a large input signal. The simulated parameters, particularly the high linearity expressed in the input third-order intercept point (IIP3) of 5 dBm, make the design a promising solution for IEEE 802.11ax compliant receivers. Additionally, the low power consumption of 3.5mW makes it suitable for portable devices.