International Journal of Engineering and Technology

In the UWB communication system receiver LNA is the essential module. In this paper two LNA architecture with noise cancellation and phase linearity are presented. The performance evaluation is carried out for low band UWB system having frequency range from 3 to 5 GHz and a wide band UWB system with frequency range from 3.1 to 10.6 GHz. The noise figure and the gain are major parameters considered while designing the LNA’s. This paper gives the detailed analysis for both low band as well as wide band LNA. The phase linear LNA achieves gain of 12 dB, a maximum noise figure of 2.6 dB for the wideband frequency range. Whereas, the noise cancellation low band LNA achieves a gain of 11.3 dB and the noise figure of 4.04 dB. The gain of wide band phase linear LNA is flat over the band of interest as compare to the noise cancellation LNA.