Design of a Wideband Low Noise Amplifier for 70-1000MHz Frequency Range

This paper presents a variable gain wideband low noise amplifier working in 70MHz-1GHz frequency range designed in TSMC0.18μm CMOS technology. In this design, a common-source stage with active-feedback structure is used to satisfy the requirements of input matching and noise figure. Simulation results indicate the maximum gain of the proposed LNA is 20 dB, while its noise figure is lower than 2.5 dB. The S11 parameter stays below -10 dB and the value of the input third intercept point(IIP3) is 1.9 dBm. Also, the LNA consumes 17 mA and supplies by 1.8 V.