Design of a low noise amplifier for UWB range of 5.5-8.5 GHz

Abstract

This study reviews and analyze the designing of Low Noise Amplifier. The parameters should be analyzed properly before the design of LNA, so this thesis includes the basics of all parameters with transmission line usage as inductor and capacitor. The first phase of thesis includes the method to designing and simulation of LNA at 5.8GHz frequency from reference. In this thesis, amplifier used is Ga-AS type where as in reference paper superHEMT was used. The method for designing LNA includes impedance matching with normalized impedance and admittance and also using microstrip lines. With the help of Stability circles one can design proper amplifier at particular frequency. Finally the simulation of LNA for 5.8 GHz has been done in Agilent ADS software version 2009 with the results of gain, NF, stability factor which is different from reference. The second phase of thesis includes the method to designing and simulation of LNA in 5.5 GHz -8.5 GHz. In this thesis, transistor used is NE3512S02 which covers desired frequency range with proper gain and noise figure. The method for designing LNA includes impedance matching with normalized impedance and admittance and also using microstrip lines. Finally the simulation of LNA in 5.5-8.5 GHz has been done in ADS software with the results of gain, NF, stability factor.