Simulation and design of a low noise amplifier working at 1.8 GHZ

Abstract

Low Noise Amplifier (LNA) is the first block in most receiver front ends. The function of it is to take in a weak signal acquired by a RF receiver antenna, and provide a good amount of gain without adding much additional noise. This helps creating a robust signal that can be passed through the rest of the receiver system and be accurately demodulated.

This report describes the design and simulated result of a LNA. The LNA operates at about 1.8GHz designed by Advantage Design System 2009 (ADS2009) software. The main goal of this project is to design the LNA that has a noise figure is very low (less than 2.0 dB), the gain of larger 15 dB and stability factor K greater than 1 with excellent match on input and output. The transistor FET is biased at Vds =2.7V

and 10mA of Ids

The LNA at 1.8 GHz can be used for GSM (Global System for Mobile

Communications) applications.