Abstract

In this paper, the design of a low noiseamplifier (LNA) for WiMAX application is preasented. This LNA is design to operate at frequency range 3.3 GHz to 3.8GHz and the noise figure targeted are less than 2 dB while gain is more than 10 dB. Transistor ATF-54143 Low Noise Enhancement Mode Pseudomorphic HEMT from Avago Technology will be used to design the LNA because it meet the specifications and recommended by Avago Technology in LNA design for WiMAX application. AWR Microwave Office will be used in simulation for this project and starting from scratch, the LNA will be designed from 2-port network transistor, input and output matching and DC biasing to design a single stage LNA. Two techniques in LNA design which is the Feedback Amplifier (FA) and Balance Amplifier (BA) will be used and simulated to find the best technique which give optimum performance in terms of gain and noise figure. The best technique is the Feedback Amplifier which gives nominal noise figure of 1.02 dB and gain of 12 dB.

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