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

  • 제21권8호
  • /
  • Pages.851-856
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  • 2010
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  • 1226-3133(pISSN)
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  • 2288-226X(eISSN)
한국전자파학회 (The Korean Institute of Electromagnetic Engineering and Science)
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Dynamic Bias Switching을 이용한 3.5 GHz Balanced Power Amplifier의 효율 개선

Efficiency Enhancement for the 3.5 GHz Balanced Power Amplifier Using Dynamic Bias Switching

  • 서민철 (성균관대학교 정보통신공학부) ;
  • 김경원 (성균관대학교 정보통신공학부) ;
  • 김민수 (성균관대학교 정보통신공학부) ;
  • 김형철 (성균관대학교 정보통신공학부) ;
  • 전정배 (성균관대학교 정보통신공학부) ;
  • 양영구 (성균관대학교 정보통신공학부)
  • Seo, Min-Cheol (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Kim, Kyung-Won (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Kim, Min-Su (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Kim, Hyung-Chul (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Jeon, Jeong-Bae (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Yang, Youn-Goo (School of Information and Communication Engineering, Sungkyunkwan University)
  • 발행 : 2010.08.31
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초록

본 논문에서는 3.5 GHz에 설계된 balanced amplifier에 DBS(Dynamic Bias Switching)를 적용하여 평균 전력에서 효율을 개선하였다. DBS는 입력 신호의 포락선 크기에 따라 전력 증폭기에 두 단계의 드레인 전압을 인가하여 효율을 개선하는 기술로써 balanced amplifier에 DBS를 적용하기 위해서 동일하게 구성된 DBS 회로를 각 단에 설치하여 실제 제작하였다. 20 MHz 대역폭과 8.5 dB의 PAR(Peak to Average Ratio)을 갖는 OFDM 신호를 사용하여 측정한 결과, 28 V 단일 드레인 전압을 사용했을 때보다 42.5 dBm에서 6 %의 PAE 개선을 나타냈다.

This paper presents an efficiency enhancement for the balanced power amplifier using DBS(Dynamic Bias Switching) method which dynamically provides the power amplifier with two bias voltage levels according to the input envelope signal. In order to apply the dynamic biases to each side of the balanced power amplifier, two switching stages are adopted. Using an OFDM signal with a bandwidth of 20 MHz and a PAR(Peak to Average Ratio) of 8.5 dB, 6 % of PAE(Power-Added Efficiency) is improved at an output power of 42.5 dBm.

키워드

참고문헌

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피인용 문헌

  1. HF-Band Magnetic-Field Communication System Using Bias Switching Circuit of Class E Amplifier vol.23, pp.9, 2012, https://doi.org/10.5515/KJKIEES.2012.23.9.1093