A 3.1-8 GHz CMOS UWB front-end receiver

A two-stage down-conversion architecture for 3.1–8 GHz ultra-wideband receiver front-end is designed which uses a local oscillator frequency equal to half the input frequency. The down-conversion technique is performed in two steps based on half-RF architecture to produce baseband signal. The proposed technique is implemented in 0.18 µm CMOS technology which achieves a conversion gain ranges from 36.1–32.4 dB and noise figure of 5.4–8.3 dB across the bandwidth.