| 一种新的用于射频功率放大器的预失真器 |
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| 引用本文： | 刘战胜,贾建华.一种新的用于射频功率放大器的预失真器[J].现代电子技术,2006,29(4):19-20,25. |
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| 作者姓名： | 刘战胜 贾建华 |
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| 作者单位： | 同济大学,电信学院,上海,200331 |
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| 摘 要： | 研究了一种新的预失真线性化电路,他由2路谐波发生器组成,每个谐波发生器都由2个工作于不同偏置电压下的肖特基二极管、电容、电阻和3 dB电桥耦合器(Hybrid)构成。通过调节二极管的偏置电压,可分别产生IM3或IM5。将此预失真线性化电路用于5 W射频功率放大器中,分别独立地对消IMD3和IMD5。双音测试表明,IMD3和IMD5分别改善了14 dBc和9 dBc。
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| 关 键 词： | 预失真器 IMD3 IMD5 谐波发生器 双音测试 |
| 文章编号： | 1004-373X（2006）04-019-02 |
| 收稿时间： | 2005-08-25 |
| 修稿时间： | 2005-08-25 |
A New Predistorter for RF Power Amplifiers |
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| LIU Zhansheng,JIA Jianhua.A New Predistorter for RF Power Amplifiers[J].Modern Electronic Technique,2006,29(4):19-20,25. |
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| Authors: | LIU Zhansheng JIA Jianhua |
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| Affiliation: | Electronics and Information Institute, Tongji University, Shanghai, 200331, China |
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| Abstract: | In this paper,a new predistortion linearizer is proposed,which includes two harmonic generators,each consists of two(diodes) biased separately,capacitance,resistance and 3dB Hybrid.The harmonic generator can generate the third or fifth IMs indepen-dently by adjusting the offset voltage of the diodes.By applying this linearizer to 5 W RF power amplifier,the IMD3 and IMD5 order(intermodulation) distortions are cancelled independently.Two-tone test results show that the improvements in IMD3 and IMD5 cancellations are 14dBc and 9dBc respectively. |
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| Keywords: | predistorter IMD3 IMD5 harmonic generator two tone test |
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