Improved low noise and highly linear 5–6 GHz LNA for Wi-Fi 6/6E-IEEE 802.11ax standard 5G application

This paper proposes a wideband high linear LNA for multi-user applications that adopts a bootstrapped resonant circuit at the input terminal to provide better impedance matching with improved linearity performance. This LNA eliminates narrowband limitations and aims to bring high bandwidth, low noise, and maximum gain with high linearity. The proposed LNA design and implementation is carried out in UMC 180 nm CMOS process technology, and its characteristics are verified with post-layout simulations. In 5–6 GHz frequency, the LNA attains a maximum gain of 23.65 dB, lower Noise Figure of 2.5 dB, and an input return loss of − 35.1 dB with the power consumption of 9.73 mW from a 1.8 V supply. The IIP2 and IIP3 of LNA achieve a maximum of 14.22 dBm and + 6.78 dBm at the frequency of 5.3 GHz with unconditional stability for a wide range and attains better Figure of Merits (FoM) compared to the recently proposed LNAs in the literature. This proposed LNA is highly suited for high bandwidth and reduced congestion wireless applications like multi-user IEEE 802.11ax called High-Efficiency Wireless (HEW) systems.