›› 2011, Vol. 24 ›› Issue (10): 19-.

• Articles • Previous Articles     Next Articles

Research on Drain Voltage of Class F Power Amplifier

 ZHANG Hong, CAI Fei, XIE Bing-Yi, LV Guo-Qiang   

  1. (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)
  • Online:2011-10-15 Published:2011-10-24

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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%.

Key words: class F;power amplifier;drain voltage;PAE

CLC Number: 

  • TN722.7+5

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