대전력증폭기의 AM/AM과 AM/PM을 독립적으로 제어하는 전치외곡보상기 설계

A Design of Predistorter for Independently Controllable AM/AM and AM/PM of High Power Amplifier

  • 발행 : 2003.07.21

초록

Amplifier linearity plays a major role in the design of mordern communication systems. An independently controllable AM/AM and AM/PM predistortion linearizers that consists of two bias feed resistance linearizers is proposed. This linearizer allows independent adjustment of the AM/AM and AM/PM curves by using two adjustable voltages to compensate the power amplifier non-linearities. The predistortion linearizer can improve the ACPR by SdB with cdma2000 multi carrier signals. By applying this linearizer to two-tone 880MHz power amplifier, an improvement of adjacent channel leakage power up to 5dBm has been achieved.

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