DESIGN & IMPLEMENTATION OF CMOS LNA FOR WIRELESS APPLICATIONS

Abstract

In recent years the advancement in the wireless communication technologies especially in the RF range including all the major applications like (satellite communication, mobile communication, IOTs). The basic characteristics of the RF transceiver system is determined by the major components which includes mixer, LNA, Filters, ADC and DAC converters. However, the properties of RF transceiver is mainly affected by the designing of Mixers and LNA. In this thesis LNA for 2.4 GHz ISM band that is (Industrial, Scientific and Medical band) for RF transceiver system is designed and implemented. The basic parameters of LNA includes low power consumption, small supply voltage and low chip area. Apart from this LNA should have high matching network for (minimum return loss) , low noise figure, optimum gain and high linearity. The LNA is implemented in 180 nm and 45nm TSMC Technology on Advance Designing Software (ADS). The LNA is implemented using major topologies like Common source, Common gate and Cascoded Topology. The mode of implementation of LNA with CS or CG depends upon the mode of applications. The most common and efficient topology is common source with inductor degenerate cascoded with Common gate topology. The LNA attains the NF of 1.23 and third order intercept point (IIP3) (measure of linearity) of 56.85 dBm which is best so far.