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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Design of a 2.6 GHz GaN-HEMT Doherty Power Amplifier IC for Small-Cell Base Station Systems

Small-Cell 기지국 시스템을 위한 2.6 GHz GaN-HEMT Doherty 전력증폭기 집적회로 설계

  • Lee, Hwiseob (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Lim, Wonseob (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Kang, Hyunuk (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Lee, Wooseok (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Lee, Hyoungjun (Wave Electronics Co., Ltd.) ;
  • Yoon, Jeongsang (Wave Electronics Co., Ltd.) ;
  • Lee, Dongwoo (Wave Electronics Co., Ltd.) ;
  • Yang, Youngoo (School of Information and Communication Engineering, Sungkyunkwan University)
  • 이휘섭 (성균관대학교 정보통신대학) ;
  • 임원섭 (성균관대학교 정보통신대학) ;
  • 강현욱 (성균관대학교 정보통신대학) ;
  • 이우석 (성균관대학교 정보통신대학) ;
  • 이형준 ((주)웨이브일렉트로닉스) ;
  • 윤정상 ((주)웨이브일렉트로닉스) ;
  • 이동우 ((주)웨이브일렉트로닉스) ;
  • 양영구 (성균관대학교 정보통신대학)
  • Received : 2015.09.24
  • Accepted : 2016.01.11
  • Published : 2016.02.29
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Abstract

This paper presents a 2.6 GHz Doherty power amplifier IC to enhance the back-off efficiency. In order to apply to small-cell base stations, the Doherty power amplifier was fabricated using GaN-HEMT process for high power density. In addition, the implemented Doherty power amplifier was mounted on a QFN package. The implemented GaN-HEMT Doherty power amplifier was measured using LTE downlink signal with 10 MHz bandwidth and 6.5 dB PAPR for verification. A power gain of 15.8 dB, a drain efficiency of 43.0 %, and an ACLR of -30.0 dBc were obtained at an average output power level of 33.9 dBm.

본 논문에서는 2.6 GHz에서 동작하는 Doherty 전력증폭기 집적회로를 설계 및 제작하여 평균 전력에서의 효율을 개선하였다. Small-cell 기지국 시스템에 적합하도록 전력 밀도가 높은 GaN-HEMT 공정을 사용하여 설계하였으며, 제작된 Doherty 전력증폭기 집적회로를 QFN 패키지 내부에 수용하여 시스템 적용에 용이하도록 하였다. 제작된 GaN-HEMT Doherty 전력증폭기 집적회로는 10 MHz의 대역폭 및 6.5 dB의 PAPR 특성을 갖는 2.6 GHz LTE 신호에 대하여 평균 전력 33.9 dBm에서 15.8 dB의 전력 이득, 43.0%의 효율 및 -30.0 dBc의 ACLR 특성을 나타낸다.

Keywords

References

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