Design and analysis of low noise amplifier for satellite transponder

A typical Geostationary Satellite which is used to receive and retransmit signals from the earth. A communication satellite is capable of receiving and retransmitting one or more independent signals. The electronic equipment used to amplify and shift the frequency of each signal is called a transponder. In this paper a Low Noise Amplifier for satellite transponder application at 10GHz is designed. This proposed LNA is used to amplify the weak signal at the front end of the receiver. The Low Noise Amplifiers are implemented using PHEMT and GaAsFET. The parameters are such as input return loss (Su), output return loss (S22), gain (S2i) and noise figure are simulated by using ‘ADVANCED DESIGN SYSTEM(ADS)’ and results are shown.