Nonlinear Characteristic Analysis of Low Noise Amplifier Using Volterra Series

The low noise amplifier (LNA) is a commonly device used in RF front-end. In this paper, a third-order nonlinear theoretical model of LNA based on Volterra series is proposed. The expression of the power of fundamental signal and third-order intermodulation signal when the input signal is a dual-frequency signal are given. The correctness and accuracy of the theoretical model is verified by the good agreement between the measured data and simulated data.