Design of a wideband low noise amplifier using modified cascode structure for 45GHz band applications

In this paper a low noise amplifier (LNA) with modified cascode structure in 45 GHz frequency band is presented. The LNA has been designed using TSMC 0.18 um RF-CMOS Technology The modified cascode structure is used to increase maximum stable gain (MSG), reduce noise figure and improve stability. In order to achieve wideband matching, band pass networks are used for input and output matching. This two stage LNA has 8 dB small signal gain and 4.8 dB noise figure in 45 GHz and the 3dB bandwidth is 20 GHz with insertion loss lower than −10 dB in all of the bandwidth. The supply voltage is 1.8 V and the consumed power is 11.2 mW. This LNA has better noise figure and bandwidth in comparison with the similar reported works.