Design of UWB LNA using RC feedback technology

A low power UWB low noise amplifier (LNA) using RC feedback loop is presented. The circuit design consists of cascode and self body bias technique. This circuit is composed of a common-drain (CD) stage with a cascode stage that can used to enhance the bandwidth. The power reduction can be achieved by the self-body bias technique. The circuit was fabricated in a TSMC 0.18 µm CMOS process. The measurement results show the proposed UWB LNA can achieve a maximum power gain (S21) of 10.9dB with the 3dB bandwidth from 3.1GHz to 10.6GHz. The input reflection coefficient S11 and output reflection coefficient S22 are lower than −9.8dB and −10.1dB, respectively. A minimum noise figure of 3.6 dB, and an input third-order intercept point IIP3 of −12.2dBm. It consumes 5.4mW power consumption from 1V supply voltage.