The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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S-Band Solid State Power Oscillator for RF Heating

RF 가열용 S-대역 반도체 전력 발진기

  • Jang, Kwang-Ho (Department of Wireless Communications Engineering, Kwangwoon University) ;
  • Kim, Bo-Ki (Department of Wireless Communications Engineering, Kwangwoon University) ;
  • Choi, Jin-Joo (Department of Wireless Communications Engineering, Kwangwoon University) ;
  • Choi, Heung-Sik (LG Electronics) ;
  • Sim, Sung-Hun (LG Electronics)
  • Received : 2017.12.11
  • Accepted : 2018.01.24
  • Published : 2018.02.28
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Abstract

This paper presents a design study of a solid state power oscillator to replace the conventional magnetron. The operational conditions of a single-stage 300 W LDMOS power amplifier were fully characterized. The power module consisted of two amplifiers connected in parallel. A delay-line feedback loop was designed for self-oscillation. A phase shifter was inserted in the delay-line feedback loop for adjusting the round-trip phase. Experiments performed using the power oscillator showed an output power of 800 W and a DC-RF conversion efficiency of 58 % at 2.327 GHz. The measured results were in good agreement with those predicted by numerical simulations.

본 논문은 마그네트론 대체를 위한 반도체 전력 발진기 모듈 설계에 관련된 내용을 기술하였다. 300급 LDMOS 단일 전력 증폭기의 특성을 확인하였고 두 개를 결합하여 모듈을 구성하였다. 결합된 모듈에 delay-line feedback loop을 구성하고 위상 천이기를 이용하여 위상을 조절하여 발진기를 구동시켰다. 발진기 모듈 측정 결과 주파수 2.327 GHz에서 출력 800 W, 효율 58 %로 측정되었다. 이 결과는 시뮬레이션 결과와 유사한 특성을 보여준다.

Keywords

References

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