3 Abstract A CMOS low noise amplifier (LNA) for low- power ultra-wideband (UWB) wireless applications. To achieve low power consumption and wide operating bandwidth. LNA employing stagger tuning technique consists of two stacked common-source stages with different resonance frequencies.
4 0.18μm CMOS process 2.6-9.2-GHz bandwidth maximum forward gain (S21) of 10.9 dB 1.8-V supply and 7.1 mW noise figure 3.5 dB IIP3 of – 5.1 dBm
5 Introduction UWB performs excellently for short-range high-speed uses Low power consumption The low noise amplifier (LNA) affect performance of signal bandwidth, noise figure, and power dissipation of the entire system
6 A feed-forward noisecanceling technique to minimize noise figure -3dB bandwidth is limited by device dimensions Difficult to achieve the frequency band requirement of UWB applications Serial resistor was used to improve the gain at low frequency
7 Design Concepts Noise performance Linearity Buffer Input impedance matching matching network at the input to resonate over the entire frequency band Hypass capacitor Coupling capacitor
8 The minimum noise figure is give by F min : the minimum noise factor ω : frequency of interest ω T : cutoff frequency; γ : the coefficients of drain noise δ : the coefficients of gate noise С : the correlation term