A Novel 3–5 GHz Active Matched Filter for Impulse Radio Ultra-Wideband

In this letter, a novel active matched filter for UWB-IR lower band (3.1-4.85 GHz) is presented. The signal to noise ratio is improved at the output using a tapped delay line with a common source amplifier. An artificial transmission line is used for wideband impedance matching. The matched filter achieves a power gain of 9.8 dB at center frequency. Input matching is better than -19 dB and output matching is better than -15 dB. The averaged SNR improvement is 4.6 dB using peak detection. Input referred 1-dB compression point is 0.7 dBm at the center frequency. The matched filter is biased from a 1.5 V supply with a total power consumption of 38 mW.