DESIGN OFALOW NOISE AMPLIFIER

Abstract

Low Noise Amplifiers (LNAs) are critical components in radio- frequency (RF) front-end systems, responsible for amplifying extremely weak signals received from antennas while maintaining minimal noise degradation. The performance of an LNA directly impacts the sensitivity and reliability of communication systems such as wireless networks, satellite communication, and radar systems. This paper presents the design and analysis of a CMOS-based LNA using cascode topology combined with inductive source degeneration. The proposed design aims to achieve high gain, low noise figure, proper impedance matching, and improved linearity. The implementation is carried out using 90 nm CMOS technology in Cadence Virtuoso environment. Simulation results demonstrate that the proposed design achieves significant improvement in gain and noise performance while maintaining stability and low power consumption.