Proceedings of the Korea Electromagnetic Engineering Society Conference (한국전자파학회:학술대회논문집)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Design and Fabrication of 10W Feedforward Linear Power Amplifier adding Feedback Loop for IMT-2000

궤한루프를 첨가한 IMT-2000용 10W급 Feedforward 선형 전력 증폭기의 설계 및 제작

  • 류병하 (경북대학교 전자전기 공학부) ;
  • 장중호 (경북대학교 전자전기 공학부) ;
  • 김성민 (경북대학교 전자전기 공학부) ;
  • 최현철 (경북대학교 전자전기 공학부)
  • Published : 2000.11.01
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Abstract

In this paper, A Feedforward Linear Power Amplifier which is appended a feedback loop for IMT-2000 was designed and fabricated. Feedback loop was used to improve the IMD(Inter-Modulation Distortion) characteristics of the main amplifier. And it is easy to cancel IMD on the min path and control IMD cancellation loop, compared with basic Feedforward Linear Power Amplifier. This feedback loop has the same effect of the Predistroter. So, This power amplifier was improved in IMD characteristics to add the effect of Predistroter to basic Feedforward amplifier. And the disigned power amplifier in this paper represented the 40dBm(10W) output and -55dBc 3rd IMD at center frequency 2.14GHz (@10MHz).

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