| 摘要: |
| 设计了一种简单而有效的射频预失真器。通过理论分析指出,为了灵活有效
地产生期望的预失真特性，预失真器应包含至少两个独立调节变量。以此为依据，提出了一
个由二极管和分别与之串联和并联的电阻和电容组成的预失真电路,将其应用于工作在1.
9 GHz、输出功率为43 dBm的功放，三阶互调失真系数（IMD3）改善10 dBc。该
预失真器不仅对非线性改善效果明显，与同类预失真电路相比，还具有结构简单、体积小
、成本低的优点。 |
| 关键词: 射频功率放大器 预失真器 线性化技术 |
| DOI： |
|
| 基金项目: |
|
| Analysis and Design of a Novel Effective RF Predistorter |
| NING Gao-li,XIE Yong-jun,LEI Zhen-ya |
| (National Key Laboratory of Antennas and Microwave Technology,Xidian Universit
y, Xi′an 710071, China;National Key Laboratory of Antennas and Microwave Technology,Xidian Universit
y, Xi′an 710071, China;EMC Lab, Beijing University of Aeronautics and Astronautics, Beijing 100083, C
hina) |
| Abstract: |
| A simply configurated and effective RF predistorter is proposed.
Further theoretical analysis demonstrates that to generate the desired predistor
tion characteristics flexibly and effectively, two independent variables of adju
stments at least are needed. Then based on the above conclusion a predistortion
circuit composed of a diode with a series resistor and a shunt capacitor is pres
ented. Applying it to the power amplifier operating at 1.9 GHz with output p
ower of 43 dBm, the IMD3 is improved by 10 dBc. Compared with other predistortio
n circuits of the same kind, it is simple, miniature, cost effective as well as
giving the great linearity improvement. |
| Key words: RF power amplifier predistorter linearization techniques |
