Multi-carrier High-power High Linearity Rf Amplifier Module Development

High power linear amplifiers are the key components of satellite communications, wireless communications, high capacity numeral microwave communications, CATV, WLAN and other communication systems. And high efficiency and linearization are the main requires of the communication systems to the power amplifiers. Most of the power amplifiers using in the systems today are importations and the army needs the homemade linear power amplifiers urgently.The efficiency and linearity of HPA used to be self-contradiction.In this paper, we considered both efficiency and linearization, and take the scheme of self-reaction control module plus predistortion and feed-forward technologies to improve the high power amplifier's linearity.The efficiency is improved on the base of other feedforward PA. Because of the self-control system, the linearization power amplifier system can work steadily in defiance of the changing of temperature and time. It makes the system more practicably and expends the use of the linearization system could afford high quanlity and efficiency power output for both common communication system and military system.The system use the advanced digital control panal,combine the PA and the control system into an orgamic intergrality.It can get high linear power ouput siganl by the way of feedforward and predistortion.And developed some methods to improve the efficiency of the system. Resultantly, the linearized amplifier reach -58dBc IMD3 of 8-carriers and 70W output power, and its efficiency is 13.8â„….