| F类功率放大器漏极电压研究 |
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| 引用本文： | 章宏,蔡斐,解冰一,吕国强. F类功率放大器漏极电压研究[J]. 电子科技, 2011, 24(10): 19-21,47 |
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| 作者姓名： | 章宏 蔡斐 解冰一 吕国强 |
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| 作者单位： | (1.合肥工业大学 特种显示技术教育部重点实验室,安徽 合肥 230009;2.合肥工业大学 仪器科学与光电工程学院,安徽 合肥 230009;3.合肥工业大学 光电技术研究院,安徽 合肥 230009) |
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| 摘 要： | F类功率放大器实现高效率的基本原理,是利用输出滤波器控制漏极输出的电压或电流波形。基于这一点,文中首先理论分析了在不同谐波比例下的漏极电压波形,然后利用电磁仿真软件进行验证。结果表明,仅有三次谐波和基波组合在一起时,当三次谐波和基波电压比K=0.111时,漏极电压波形最平坦;当K接近0.4时,漏极电压波形趋于方波。最后选择合适的谐波比例,设计了一款功率附加效率最大值达到88.074%的F类功率放大器。
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| 关 键 词： | F类 功率放大器 漏极电压 功率附加效率 |
Research on Drain Voltage of Class F Power Amplifier |
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| ZHANG Hong,CAI Fei,XIE Bing-Yi,LV Guo-Qiang. Research on Drain Voltage of Class F Power Amplifier[J]. Electronic Science and Technology, 2011, 24(10): 19-21,47 |
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| Authors: | ZHANG Hong CAI Fei XIE Bing-Yi LV Guo-Qiang |
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| Affiliation: | (1.Key Laboratory of Special Display Technology,Ministry of Education,Hefei University of Technology,Hefei 230009,China;2.School of Instrument Science and Opto-electronic Engineering,Hefei University of Technology,Hefei 230009,China;3.Academe of Opto-electronic Technology,Hefei University of Technology,Hefei 230009,China) |
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| Abstract: | Class-F power amplifiers employ harmonic frequency resonators to shape their drain voltage or drain current waveforms to achieve high efficiency.Based on this,drain voltage waveforms with different harmonic ratios is theoretical studied first.And then the theory is verified through an electromagnetic software simulation.If only the third harmonic is considered,the conclusions are drawn as follows：for the third harmonic and fundamental wave voltage ratio K=0.111,the drain voltage waveform is the most flat;and when K is close to 0.4,the drain voltage tends to a square wave.Finally,a class-F power amplifier with appropriate harmonic ratio is designed,with a peak power-added efficiency of 88.074%. |
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| Keywords: | class F power amplifier drain voltage PAE |
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