Browse > Article
http://dx.doi.org/10.5515/KJKIEES.2010.21.8.851

Efficiency Enhancement for the 3.5 GHz Balanced Power Amplifier Using Dynamic Bias Switching  

Seo, Min-Cheol (School of Information and Communication Engineering, Sungkyunkwan University)
Kim, Kyung-Won (School of Information and Communication Engineering, Sungkyunkwan University)
Kim, Min-Su (School of Information and Communication Engineering, Sungkyunkwan University)
Kim, Hyung-Chul (School of Information and Communication Engineering, Sungkyunkwan University)
Jeon, Jeong-Bae (School of Information and Communication Engineering, Sungkyunkwan University)
Yang, Youn-Goo (School of Information and Communication Engineering, Sungkyunkwan University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.21, no.8, 2010 , pp. 851-856 More about this Journal
Abstract
This paper presents an efficiency enhancement for the balanced power amplifier using DBS(Dynamic Bias Switching) method which dynamically provides the power amplifier with two bias voltage levels according to the input envelope signal. In order to apply the dynamic biases to each side of the balanced power amplifier, two switching stages are adopted. Using an OFDM signal with a bandwidth of 20 MHz and a PAR(Peak to Average Ratio) of 8.5 dB, 6 % of PAE(Power-Added Efficiency) is improved at an output power of 42.5 dBm.
Keywords
Dynamic Bias Switching; Envelope Tracking; Balanced Amplifier; Orthogonal Frequency-Division Multiplexing;
Citations & Related Records
연도 인용수 순위
  • Reference
1 P. Draxler, S. Lanfranco, D. Kimball, C. Hisa, J. Jeong, J. van de Sluis, and P. M. Asbeck, "High efficiency envelope tracking LDMOS power amplifier for WCDMA", in IEEE MTT-S Int. Microw. Symp. Dig., pp. 1534-1537, Jun. 2006.   DOI
2 D. Kimball, J. Jeong, C. Hsia, P. Draxler, S. Lanfranco, W. Nagy, K. Linthicum, L. E. Larson, and P. M. Asbeck, "High efficiency envelope tracking WCDMA base-station amplifier using GaN HFETs", IEEE Trans. Microw. Theory Tech., vol. 54, no. 11, pp. 3848-3856, Nov. 2006.   DOI
3 A. Khanifar, N. Maslennikov, R. Modina, and M. Gurvich, "Enhancement of power amplifier efficiency through dynamic bias switching", in IEEE MTT-S Int. Microw. Symp. Dig., pp. 2047-2050, Jun. 2004.   DOI
4 J. Van, S. Jung, H. Park, M. Kim, H. Cho, J. Jeong, S. Kwon, K. Lim, and Y. Yang, "Efficiency enhancement for power amplifier using dynamic bias switching technique", IEE Electronics Letters, vol. 44, no. 5, pp. 356-357, Feb. 2008.   DOI
5 W. Y. Zou, Y. Wu, "COFDM: An overview", IEEE Trans. Broadcast., vol. 41, pp. 1-7, Mar. 1995.   DOI
6 W. Liu, J. Lau, and R. S. Cheng, "Considerations on applying OFDM in a highly efficient power amplifier", IEEE Trans. Circuits Syst.II, Analog Digit. Signal Process, vol. 46, pp. 1329-1336, Nov. 1999.   DOI
7 F. H. Raab, "Efficiency of Doherty RF power amplifier system", IEEE Trans. Broadcast., vol. BC-33, pp. 77-83, Sep. 1987.   DOI