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

  • 제13권9호
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  • Pages.924-931
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  • 2002
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  • 1226-3133(pISSN)
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  • 2288-226X(eISSN)
한국전자파학회 (The Korean Institute of Electromagnetic Engineering and Science)
권호 표지

λ/4 DGS 바이어스 선로를 이용한 전력증폭기 설계

Power Amplifier Design using λ/4 DGS(Defected Ground Structure) Bias Line

  • 정시균 (전북대학교 공과대학 전자정보공학부 및 정보통신연구센터) ;
  • 정용채 (전북대학교 공과대학 전자정보공학부 및 정보통신연구센터)
  • 발행 : 2002.10.01
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⟨ 이전 논문 다음 논문 ⟩

초록

본 논문에서, 기존의 λ/4 전원 전송선로의 접지면에 아령 모양의 DGS(Defected Ground Structure)를 추가한 새로운 형태의 λ/4 전원 전송선로를 제안하였다. DGS A/4 전원 전송선로는 높은 특성 임피던스 값을 유지하면서, 기존의 전원 선로보다 폭은 더 넓어지고 길이는 더 짧아졌다. 제안된 전원 선로가 신호 전송선로에 부착되면, 2차 고조파 성분뿐만 아니라 3차 고조파 성분 역시 감쇄시킬 수 있다. 증폭기에서 고조파 감쇄 특성을 갖는다면, 효율과 선형성이 개선되어진다. 제안된 전원 선로는 IMT-2000 기지국 송신 대역 전력 증폭기에 적용하였다. 본 논문에서는 제안된 새로운 DGS 구조 λ/4 전원 선로를 이용한 전력 증폭기의 검증을 위해, DGS 시뮬레이션과 실험 결과들을 제시하였다. 실험 결과, 기존의 구조에 비해 3차 고조파 성분은 26.5 dB 감쇄되었고, 효율은 약 9.1% 정도 향상되었으며, 3차 혼변조 왜곡 특성은 4.5 dB 개선되었다.

In this paper, a new λ/4 bias transmission line that is added dumbbell-shaped defected ground structure(DGS) on ground plane of the conventional λ/4 bias transmission line is proposed. This DGS λ/4 bias transmission line maintains high characteristic impedance, but physical width is wider and length is shorter than that of the conventional bias line. If the proposed bias line is attached on signal transmission line, this bias line can reduces the $3^{rd}$ harmonic signal as well as the$2^{nd}$ harmonic signal. With harmonic reduction characteristics, efficiency and linearity of amplifier are improved. The proposed bias line is adopted in power amplifier on IMT-2000 base-station transmitting band. This paper presents several simulations and experimental results of DGS to show validity of the proposed power amplifier using the new λ/4 bias transmission line. Experimental results represent that the $3^{rd}$ harmonic signal is reduced about 26.5 dB and efficiency is improved about 9.1 % and IMD3 is improved 4.5 dB than the conventional structure.

키워드

참고문헌

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