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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Linearity and Efficiency Improved outphasing Class-E Power Amplifier Using Composite Right/Left-Handed Transmission Lines Combiner

Composite Right/Left-Handed Transmission Lines 결합기를 이용하여 선형성과 효율을 향상한 outphasing E급 전력 증폭기

  • Eun, Sang-Ki (School of Electronics, Telecommunication and Computer Engineering, Korea Aerospace University) ;
  • Cho, Choon-Sik (School of Electronics, Telecommunication and Computer Engineering, Korea Aerospace University) ;
  • Lee, Jae-W. (School of Electronics, Telecommunication and Computer Engineering, Korea Aerospace University) ;
  • Kim, Jae-Heung (School of Electrical and Electronic Engineering, Yonsei University)
  • 은상기 (한국항공대학교 항공전자 및 정보통신공학부) ;
  • 조춘식 (한국항공대학교 항공전자 및 정보통신공학부) ;
  • 이재욱 (한국항공대학교 항공전자 및 정보통신공학부) ;
  • 김재흥 (연세대학교 전기전자공학부)
  • Published : 2008.12.31
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Abstract

outphasing class-E power amplifier using composite right/left-handed transmission lines(CRLH-TL) is proposed at 2.4 GHz. The power combiner including CRLH-TL is designed to suppress the second and third harmonics to increase linearity and the output problem of the conventional outphasing amplifier is also solved by the proposed outphasing amplifier. So the P AE is improved. The measured maximum output power at the fundamental frequency shows 31.8 dBm, whereas the PAE shows 50 % with 14 dBm input power excited. The IMD3 is improved by 5 dB compared to that of conventional outphasing amplifier.

Composite right/left-handed transmission lines(CRLH-TL) 결합기를 이용한 outphasing E급 전력 증폭기를 2.4 GHz 대역에서 동작하도록 설계하였다. CRLH 전송 선로가 포함된 전력 결합기는 2차와 3차 고조파를 억제하여 선형성을 향상시켰다. 또한, 기존의 outphasing 전력 증폭기가 갖고 있던 출력 손실 문제를 해결하여 PAE 측면에서도 이점을 얻었다. 본 연구에서는 14 dBm의 전력이 인가되었을 때 31.8 dBm의 최대 출력 전압을 측정하였으며, 이 때 PAE는 약 50 %로 확인되었다. 선형성 향상을 확인하기 위한 IMD3 측정에서는 일반적인 기존의 ${\lambda}/4$ 전송 선로를 사용하는 outphasing 전력증폭기를 사용하였을 때보다 약 5 dB 정도의 향상을 확인할 수 있었다.

Keywords

References

  1. D. C. Cox, 'Linear amplification with nonlinear components', IEEE Trans. Comm., vol. 22, pp. 1942- 1945, Dec. 1974 https://doi.org/10.1109/TCOM.1974.1092141
  2. H. Chireix, 'High power outphasing modulation', Proc. IRE., vol. 23, pp. 1370-1392, Nov. 1935 https://doi.org/10.1109/JRPROC.1935.227299
  3. I. Lin, M. Devincentis, C. Caloz, and T. Itoh, 'Arbitrary dual-band components using composite right/left handed transmission lines', IEEE Trans. Microwave Theory & Tech., vol. 50, no. 4, pp. 1142-1149, Apr. 2004
  4. S. K. Eun, S. H. Ji, C. S. Cho, J. W. Lee, and J. Kim, 'A high linearity Chireix outphasing power amplifier using composite right/left-handed transmission lines', 37th European Microwave Conference Proceedings, pp. 343-346, Oct. 2007
  5. A. Birafane, A. B. Kouki, 'Sources of linearity degradation in LINC transmitters for hybrid and outphasing combiners', Electrical and Computer Engineering 2004 Canadian Conference, pp. 547-550, May 2004
  6. I. Hakala, D. K. Choi, L. Gharavi, N. Kajakine, J. Koskela, and R. Kaunisto, 'A 2.14-GHz chireix outphasing transmitter', IEEE Trans. Microwave Theory & Tech., vol. 53, no. 6, Jun. 2005
  7. G. M. Hegazi, T. T. Chu, and R. A. Groshong, 'Improved LINC power transmission using a quadrature outphasing technique', Microwave Symposium Digest, 2005 IEEE MTT-S International, pp. 12-17, Jun. 2005
  8. G. Poitau, A. Birafane, and A. Kuki, 'Experimental characterization of LINC outphasing combiners' efficiency and linearity', Radio and Wireless Conference 2004 IEEE, pp. 87-90, Sep. 2004
  9. C. Caloz, A. Sanada, and T. Itoh, 'A novel composite right-/left-handed coupled-line directional coupler with arbitrary coupling level and broad bandwidth', IEEE Trans. Microwave Theory & Tech., vol. 52, no. 3, pp. 980-992, Mar. 2004 https://doi.org/10.1109/TMTT.2004.823579
  10. S. H. Ji, C. S. Cho, J. W. Lee, and J. Kim, '836 MHz/1.95 GHz dual-band class-E power amplifier using composite right/left-handed transmission lines', 36th European Microwave Conference Proceedings, pp. 356-359, 2002
  11. C. Caloz, T. Itoh, 'Application of the transmission line theory of left handed(LH) materials to the realization of a microstrip LH transmission line', IEEE AP-S Int. Symposium Digest, vol. 2, pp. 412- 415, 2002