Lower Power Consumption and Wider Bandwidth of a LNA for Wireless Communication Technology at 5 GHz Band

A lower power consumption and wider bandwidth low noise amplifier (LNA) operating at 5 GHz frequency band has been designed and simulated in a standard 0.18 mum CMOS technology. The proposed topology uses a capacitor to decouple the AC and DC currents, isolating the circuit elements that are connected in series and share a common DC current. This is followed by the application of a varactor to create a wideband frequency response. The varactor has been swept with voltages stepped at 0.1, 0.5 and 0.9 V to create a wideband LNA working in the frequency range of 5.150 to 5.825 GHz. The LNA simulated provides a high gain of 36.69 dB, noise figure of less than 1.87 dB and draws current at 168.8 mA from a 1.8 power supply.