Journal of Advanced Navigation Technology (한국항행학회논문지)

The Korean Navigation Institute (한국항행학회)
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High Efficiency Frequency Tunable Inverse Class-E Amplifier

고효율 주파수 가변 역 E-급 증폭기

  • Kim, Young (Department of Radio Communication Engineering, Kumoh National Institute of Technology)
  • 김영 (금오공과대학교 전파통신공학과)
  • Received : 2010.01.05
  • Accepted : 2010.04.30
  • Published : 2010.04.30
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Abstract

This paper proposes that an inverse class-E amplifier is used a tunable parallel resonator at output port in order to maintain a high power-added efficiency(PAE) and output power with wide frequency ranges. A tunable circuit has a constant Q factor at operating frequency ranges and because of using varactor diode, the inductor and capacitor values of resonator can be changed. Also, the inductance value for zero-current switching (ZCS) is implemented a lumped element and the capacitance value is made a distributed element for phase compensation. The inverse class E amplifier using tunable parallel resonator is obtained to deliver 25dBm output power and achieve maximum power added efficiency(PAE) of 75% at 65-120MHz frequency ranges.

본 논문에서는 역 E-급 증폭기 출력 회로의 병렬 공진기를 주파수에 대해 가변되도록 회로를 구성하여 넓은 주파수 범위에서 높은 전력부가효율과 출력전력을 유지하는 방법을 제안하였다. 여기서 사용된 병렬 공진기는 동작 주파수에 따라서 Q 값은 동일하고, 가변 특성을 얻기 위해서 바렉터 다이오드를 사용하여 인덕터와 캐패시터를 만들었으며, 전류 영점 교차를 위한 인덕턴스 성분은 집중소자로 또, 위상 보상을 위한 캐패시턴스는 분포소자로 구현하였다. 역 E-급 증폭기의 주파수 가변 특성을 통해서 효율과 출력 전력을 확인한 실험 결과는 65-120MHz의 주파수 범위에서 증폭기는 최대 75%의 전력부가효율과 25dBm의 출력전력을 얻었다.

Keywords

References

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