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Abstract

This paper presents a design of Ultra Wideband Low Noise Amplifier (LNA) with Negative Feedback and multi-section matching network implementing on Microstrip design technique. The design started with selecting a transistor which is Super-low noise InGaAs HEMT MGF4937AM transistor that support ultra-wideband frequencies. In order to achieve ultra-wideband LNA, two different techniques which implementing negative feedback and multisection matching. The uses of negative feedback would degrade the gain while increasing the stability of the system. However, this problem can be overcome by introducing cascaded topology which can increase the gain while leaving the system stable. This LNA design is based on Rogers 4350B microstrip characteristic designed using Advanced Design System (ADS) software. The LNA provides an input return loss (S11) which less than -10 dB and the gain (S21) more than 15 dB and noise figure less than 4dB. UWB LNA can be used on several types of application such as wireless sensor and personal area networks, ground penetrating radars, and medical applications.