Abstract: A new radio frequency linearized power amplifier （LPA） system for wideband-code-division- multiple-access （WCDMA） application is demonstrated. The analog predistortion technology is adopted. The predistortion signal is generated by Schottky Diodes, put the predistortion signal into the main amplifier, the intermodulation-distortion （IMD） components of the main amplifier could be reduced. Such predistortion linearizer exhibits the improvement of 16 dB in the adjacent channel power ratio （ACPR） for WCDMA system when the output power is 16W.