대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

바이어스 단에 따른 Doherty 전력증폭기의 성능개선

Performance enhancement of Doherty power amplifier with drain bias line

  • 장필선 (단국대학교 전자컴퓨터공학부) ;
  • 방성일 (단국대학교 전자컴퓨터공학부)
  • Jang, Pil-Seon (School of Electronics and Computer Engineering Dankook University) ;
  • Bang, Sung-Il (School of Electronics and Computer Engineering Dankook University)
  • 발행 : 2007.07.11
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초록

In this paper, we propose Doherty amplifier with proper drain bias line. By $\lambda$/4 microstrip line, IMD is eliminated. Also output power of amplifier is reduced in wanted bandwidth. For linearity improvement, we design drain bias with narrow $\lambda$/4 microstrip line. We observe that gain characteristics improve 1dB and $3^{rd}/5^{th}$ IMD characteristics reduce 5dB/10dB.

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