A concurrent low-area dual band 0.9/2.4 GHz LNA in 0.13µm RF CMOS technology for multi-band wireless receiver

This article presents the design of a low area novel concurrent dual-band LNA operating in the GSM 0.9GHz/BLUETOOTH 2.4GHz communication standards. The concurrent LNA is designed and simulated in CADENCE using 130nm UMC technology. A conventional source degeneration inductor is eliminated for higher signal gain while providing reasonable input impedance. Also by adding a capacitor between the gate and the source of the input transistor, a noise source from the gate resistance is partly suppressed. The output matching network is constructed of shunt peaking. It´s easy to achieve matching and reduced chip size. The current design is especially suitable for use in multi-standard wireless receiver frontends as it saves die area and reduces power consumption by replacing parallel LNAs for each channel frequency. Simulation results indicate a Noise Figure below 2dB and S₂₁ above 14 dB in all frequency bands and also input and output return loss are below -10 dB for all desired frequency band while drawing 10mA current from a 1.2V power supply.