An Ultra-WideBand (UWB) Low-Noise Amplifier (LNA) has been proposed in this paper. The effective bandwidth of noise canceling is extended. The 0.18um CMOS technology is used in the fabrication of this amplifier. The noise figure is calculated over 3.1-10.6GHz along with good gain and noise figure, good linearity is also required for the LNA to operate properly. The l-dB compression point and IIP3 point are the characteristics measuring the linearity of the RF components.