Cross Cancellation TechniqueEmploying an Error Amplifier

摘要

In this letter, we propose a new distortion cancellation mechanism for a balanced power amplifier (PA) structure using the cross cancellation technique employing an error amplifier. The proposed cross cancellation balanced linear PA is implemented in the IMT-2000 (${f}_{0} =$ 2.14GHz) band. With commercial PAs with a peak power of 240 W for base-station application, the proposed system shows 18.6dB improvement at an average output power of 40dBm for adjacent channel leakage ratio measurement with wideband code division multiple access 4FA signal. The efficiency of the proposed structure is about 2% higher than the conventional feedforward amplifier for modulated carrier.