Integrated Design of Low Noise Amplifier and Notch Filter for Wireless Communications

摘要

This paper presents a design of low noise amplifier with notch filter for telecommunication system that can support wide range frequency from 3.1 GHz-10.6 GHz based on transistor InGaAs HEMT Avago Technologies (mgf4937) Mitsubishi. In this study, relevant amplifier theory, detailed descriptions of design and simulation process. There are three techniques which are single stage, balanced, and the feedback for the low noise amplifier is being used to achieve a wide bandwidth. Advanced Design System (ADS) software being used because it is the best software and very efficiently to design a power amplifier nowadays. Measurement results show good according to the simulation results for the amplifier. The best technique is a feedback amplifier based on the analysis showing that feedback amplifier has the highest gain and output power rather than the other technique which is balanced amplifier. The LNA provides an input return loss (S_(11)) which less than -8 dB and the gain (S_(21)) more than 20 dB and noise figure less than 2dB. LNA can be used on several types of application such as wireless local area network (WLAN) and personal area networks, ground penetrating radars, and medical applications.