Journal of electromagnetic engineering and science

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Design of a Highly Efficient Broadband Class-E Power Amplifier with a Low Q Series Resonance

  • Ninh, Dang-Duy (School of Information and Telecommunication Engineering, Soongsil University) ;
  • Nam, Ha-Van (School of Information and Telecommunication Engineering, Soongsil University) ;
  • Kim, Hyoungjun (School of Information and Telecommunication Engineering, Soongsil University) ;
  • Seo, Chulhun (School of Information and Telecommunication Engineering, Soongsil University)
  • Received : 2016.01.07
  • Accepted : 2016.04.19
  • Published : 2016.07.31
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Abstract

This work presents a method used for designing a broadband class-E power amplifier that combines the two techniques of a nonlinear shunt capacitance and a low quality factor of a series resonator. The nonlinear shunt capacitance theory accurately extracts the value of class-E components. In addition, the quality factor of the series resonator was considered to obtain a wide bandwidth for the power amplifiers. The purpose of using this method was to produce a simple topology and a high efficiency, which are two outstanding features of a class-E power amplifier. The experimental results show that a design was created using from a 130 to 180 MHz frequency with a bandwidth of 32% and a peak measured power added efficiency of 84.8%. This prototype uses an MRF282SR1 MOSFET transistor at a 3-W output power level. Furthermore, a summary of the experimental results compared with other high-efficiency articles is provided to validate the advantages of this method.

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References

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