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The Design of the Linear Power Amplifier using Analog Feedforward Linearizer for IMT-2000 Band  

朴雄熙 (한국전자통신연구원 )
李慶熙 (한국전자통신연구원 )
姜尙璂 (한국전자통신연구원 )
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.39, no.6, 2002 , pp. 27-27 More about this Journal
Abstract
In this paper, the LPA(Linear Power Amplifier) using new analog feedforward linearizer for IMT-2000 frequency band(2110MHz∼2170MHz) is proposed and fabricated. The designed analog feedforward linearizer system possessing the characteristics of stable operation for input power variation is simple structure and small size. When two-tones in IMT-2000 frequency band are applied to an amplifier, this LPA have the average output power is about 30W and the IMD value is below about 60dBc without correcting the circuit. In camparision with an amplifier without feedforward system at the same output power, the supposed analog feedforward linear amplifier posseses improved the IMD characteristics of over 23dB.
Keywords
Linearizer; Feedforward; power Amplifier;
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  • Reference
1 Nick Pothecary, Feedforward Linear Power Amplifier, Artech House, 1999.
2 정용채, 혼변조 신호의 개별 차수 조정 Predistortion 선형화기 설계, 박사학위 논문, 서강대학교, 1995.
3 K yamauchi, K Morl, M Nakayama, Y. Mitsui, T. Takagi, "A Microwave Miniaurized linearizer Using a Parallel Diode", IEEE MIl-S Digest, pp. 1199-1202, 1997.
4 P. B. Kenington, High-linearity RF Ampli-fier Design, Artech House, 2000.
5 Hsieh C, Chan S., "A S-band high power feedback amplifier", Proceeding of IEEE MIlS, pp.182-184, 1997.
6 남상대, 박웅희, 장익수, 윤상원 'Feed-forward 선형화기 시스템의 오차 추출 루프를 위한 크기와 위상 제어 회로의 설계', 대한 전자공학회지, 제 37권 TC편, 제2호 pp. 91-97, 2. 2000.