A 2.4 GHz ultra low-power high gain LNA utilizing π-match and capacitive feedback input network

In this paper, an ultra low-power CMOS low noise amplifier (LNA) with a new input matching topology will be proposed and analyzed. The LNA design is based on the capacitive feedback in conjunction with a π-match network. The proposed LNA saves on chip area by using only one inductor for the input matching. The π-match network introduces an additional degree of design freedom and allows the LNA to achieve higher gain. The LNA is designed for 2.4 GHz ISM band in a 130 nm RF-CMOS process. It achieves a gain of 25.2 dB with an S
₁₁
of -14 dB while consuming only 0.6 mW. The noise figure (NF) is 3.8 dB.