Abstract
This paper presents a low power direct conversion UWB receiver with a pulse detector designed for operation in 3 UWB lower bands from 3.1 to 5 GHz. The IC is implemented using the 0.18-mu m RF CMOS technology with 1.8V voltage supply. The proposed Low Noise Amplifier (LNA) has a variable gain optimized for low power consumption. The de power consumption of the LNA is 7.1mW for the minimum gain of 24dB and 12.85mW for the maximum gain of 40dB within the 3.1-5.0 GHz band. Quadrature zero-IF down conversions and rectifications are used to detect the UWB pulses. An S-QVCO is used to generate the Local Oscillator frequency for each sub-band. The total power consumption of the receiver is 21.9mW for the LNA gain of around 30 dB.