Publication

Abstract : With the emergence of the internet-of-things (IoT), many devices process data through the IEEE 802.11 wireless networks. To satisfy the increased data processing, the wireless fidelity (Wi-Fi) networks must have sufficient capacity. IEEE 802.11ax is formulated to provide higher data processing capabilities for IoT applications. The IEEE 802.11ax receiver operating at 5GHz must be able to withstand interference from nearby IoT applications. Hence, the low-noise amplifier (LNA) employed in such receivers must have a high input-referred third-order intercept point (IIP3). This paper aims to present a wideband LNA operating at 5GHz with high IIP3 for modern IoT transceivers using IEEE 802.11ax protocol. The LNA is designed and implemented in UMC 65nm CMOS technology using the Cadence virtuoso design tool. The proposed LNA can provide a maximum gain of 17.64dB while consuming 8.18mW of power from a 1.2V supply. It can be noted that the minimum noise figure (NF) achieved is 3.67dB and the corresponding IIP3 is 9.44dBm at 5GHz from the pre-layout simulations.