A low-power 3.1–5GHz ultra-wideband low noise amplifier utilizing Miller Effect

The candidate topologies for low-power, wideband LNAs are analyzed in this paper, and a novel LNA topology for the 3.1–5 GHz UWB frequency band is presented. The LNA uses subthreshold biasing and employs its Miller capacitance as part of a Butterworth-type bandpass filter for input impedance matching. The LNA achieves a power gain of 14.4 dB with S11 less than −10 dB across the 3.1–5 GHz frequency band. The power consumption is less than 1.5 mW, and the noise figure varies from 5.7–6.3 dB across the 3.1–5 GHz frequency band.