An Ultra-Wideband Low-Noise Amplifier for 3-5-GHz Wireless Systems

In this paper, an ultra-wideband low-noise amplifier is designed and simulated in a 0.13-mum CMOS technology for a 3-5-GHz UWB system. For ultra-wideband operation, shunt-series feedback topology is used. To improve noise performance, the amplifier employs inductive load. Biasing point variation which occurs due to the resistive feedback is fixed by adding a capacitor in series with feedback. Thus, the desirable gain is achieved with a lower power consumption. Simulations show a -3-dB gain bandwidth of 6 GHz between 2 GHz and 8 GHz, a minimum noise figure of 1.9 dB in the 3-5-GHz band, a power gain of 11.5 dB while consuming 13.9 mW.