Feedforward power amplifier linearization performance analysis and optimization with non-ideal components not ideally

In order to guide the engineering commissioning and optimization of feedforward super linear power amplifier, this paper analyzes the feedforward power amplifier linearization performance and optimized parameters when the components are not ideal. First of all, the theoretic numerical relations of the linearity and branch amplitude mismatch, phase mismatch and delay mismatch are derived, without considering the error power amplifier distortion conditions, which is based on the simplified loop model. The relation of cancellation ratio, delay mismatch and linearization bandwidth is derived. Then, the effective cancellation ratio is defined based on considering error power amplifier distortion. The cancellation ability of third order inter-modulation distortion(IMD3) is analyzed in detail. Finally, the optimization theory is analyzed based on the designed feedforward linear power amplifier. The experimental results show that the amplifier linearity improves 36.23 dB.