A dual wideband CMOS LNA design for the 4G of wireless applications

A dual wide band low noise amplifier for WiMAX (802.16a) standard is presented. The circuit is designed with AMS 0.35 mum CMOS process. This LNA is designed to cover the two frequency ranges for licensed and unlicensed bands of the WiMAX 2-4 GHz and 5-6 GHz. The proposed amplifier achieves a wide band input matching with Sn lower than -10 dB for all the band 2-6 GHz, a flat gain for the two bands; 13 db between 2-4 GHz and 10 dB between 5-6 GHz. The noise figure is around 3 dB for all the band and 2-6 GHz. The presented dual wide band LNA employs a Chebychev filter for input matching and an inductive shunt feedback for output matching. The power consumption is 62.5 mW under a power supply voltage of 2.5 V.