A new Linearization technique of Power Amplifier

The linearity of the wireless communication circuits became more important with the progress of the communication technology. The nonlinearity of the power amplifier (PA) in the wireless communication circuits can directly lead to nonlinearity of circuit system, so it is important to use linear modulation techniques to improve the nonlinear distortion of PA. This paper describes a novel approach of using a diode as an active linearizer to minimize nonlinear distortion. In case of pHEMT, this technique reduces the effect of nonlinearities in power amplifiers due to voltage variable input capacitance.