Efficiency enhancement of doherty amplifier through mitigation of the knee voltage effect

IEEE Transactions on Microwave Theory and Techniques

Volumn 59, Issue 1, 2011, Pages 143-152

  Moon, Junghwan ^a   Kim, Jangheon ^a   Kim, Jungjoon ^b   Kim, Ildu ^b   Kim, Bumman ^a  

^a Pohang University of Science and Technology (POSTECH)   (South Korea)

^b SAMSUNG Electronics   (South Korea)

Author keywords

Doherty; efficiency enhancement; gallium nitride; knee voltage; load modulation; power amplifier (PA); worldwide interoperability for microwave access (WiMAX)

Indexed keywords

DOHERTY; EFFICIENCY ENHANCEMENT; KNEE VOLTAGE; LOAD MODULATION; WORLDWIDE INTEROPERABILITY FOR MICROWAVE ACCESS;

CHANNEL ESTIMATION; GALLIUM ALLOYS; GALLIUM NITRIDE; HETEROJUNCTION BIPOLAR TRANSISTORS; INTEROPERABILITY; MODULATION; OPTIMIZATION; WIMAX;

DOHERTY AMPLIFIERS;

EID: 78651337107     PISSN: 00189480     EISSN: None     Source Type: Journal    
DOI: 10.1109/TMTT.2010.2091207     Document Type: Article

References (24)

1. F. H. Raab, P. Asbeck, S. Cripps, P. B. Kenington, Z. B. Popović, N. Pothecary, J. F. Sevic, and N. O. Sokal, "Power amplifiers and transmitters for RF and microwave," IEEE Trans. Microw. Theory Tech., vol. 50, no. 3, pp. 814-826, Mar. 2002.
2. J. Choi, D. Kang, D. Kim, J. Park, B. Jin, and B. Kim, "Power amplifiers and transmitters for next generation mobile handset," J. Semiconduct. Technol. Sci., vol. 9, no. 4, pp. 249-256, Dec. 2009.
3. L. Kahn, "Single-sideband transmission by envelope elimination and restoration," Proc. IRE, vol. 40, no. 7, pp. 803-806, Jul. 1952.
4. D. F. Kimball, J. Jeong, C. Hsia, P. Draxler, S. Lanfranco, W. Nagy, K. Linthicum, L. E. Larson, and P. M. Asbeck, "High-efficiency envelopetracking W-CDMA base-station amplifier using GaN HFETs," IEEE Trans. Microw. Theory Tech., vol. 54, no. 11, pp. 3848-3856, Nov. 2006.
5. F. Wang, D. F. Kimball, J. D. Popp, A. H. Yang, D. Y. C. Lie, P. M. Asbeck, and L. E. Larson, "An improved power-added efficiency 19-dBm hybrid envelope elimination and restoration power amplifier for 802.11g WLAN applications," IEEE Trans. Microw. Theory Tech., vol. 54, no. 12, pp. 4086-4099, Dec. 2006.
6. F. Wang, A. H. Yang, D. F. Kimball, L. E. Larson, and P. M. Asbeck, "Design of wide-bandwidth envelope tracking power amplifiers for OFDM applications," IEEE Trans. Microw. Theory Tech., vol. 53, no. 4, pp. 1244-1255, Apr. 2005.
7. I. Kim, Y. Y. Woo, J. Kim, J. Moon, J. Kim, and B. Kim, "High-efficiency hybrid EER transmitter using optimized power amplifier," IEEE Trans. Microw. Theory Tech., vol. 56, no. 11, pp. 2582-2593, Nov. 2008.
8. S. C. Cripps, RF Power Amplifiers for Wireless Communications, 2nd ed. Norwood, MA: Artech House, 2006.
9. W. H. Doherty, "A new high efficiency power amplifier for modulated waves," Proc. IRE, vol. 24, no. 9, pp. 1163-1182, Sep. 1936.
10. F. H. Raab, "Efficiency of Doherty RF power-amplifier systems," IEEE Trans. Broadcast., vol. BC-33, no. 3, pp. 77-83, Sep. 1987.
11. Y. Yang, J. Yi, Y. Y. Woo, and B. Kim, "Optimum design for linearity and efficiency of microwave Doherty amplifier using a new load matching technique," Microw. J., vol. 44, no. 12, pp. 20-36, Dec. 2001.
12. J. Kim, J. Cha, I. Kim, and B. Kim, "Optimum operation of asymmetrical- cells-based linear Doherty power amplifiers-uneven power drive and power matching," IEEE Trans. Microw. Theory Tech., vol. 53, no. 5, pp. 1802-1809, May 2005.
13. Y. Yang, J. Cha, B. Shin, and B. Kim, "A fully matched -way Doherty amplifier with optimized linearity," IEEE Trans. Microw. Theory Tech., vol. 51, no. 3, pp. 986-993, Mar. 2003.
14. M. Iwamoto, A.Williams, P. F. Chen, A. G. Metzger, L. E. Larson, and P. M. Asbeck, "An extended Doherty amplifier with high efficiency over a wide power range," IEEE Trans. Microw. Theory Tech., vol. 49, no. 12, pp. 2472-2479, Dec. 2001. (Pubitemid 34055415)
15. N. Srirattana, A. Raghavan, D. Heo, P. E. Allen, and J. Laskar, "Analysis and design of a high-efficiency multistage Doherty power amplifier for wireless communications," IEEE Trans. Microw. Theory Tech., vol. 53, no. 3, pp. 852-860, Mar. 2003.
16. J. Moon, J. Kim, I. Kim, J. Kim, and B. Kim, "Highly efficient three-way saturated Doherty amplifier with digital feedback predistortion," IEEE Microw. Wireless Compon. Lett., vol. 18, no. 8, pp. 539-541, Aug. 2008.
17. J. Kim, J. Moon, Y. Y. Woo, S. Hong, I. Kim, J. Kim, and B. Kim, "Analysis of a fully matched saturated Doherty amplifier with excellent efficiency," IEEE Trans. Microw. Theory Tech., vol. 56, no. 2, pp. 328-338, Feb. 2008.
18. S. Goto, T. Kunii, A. Inoue, K. Izawa, T. Ishikawa, and Y. Matsuda, "Efficiency enhancement of Doherty amplifier with combination of class-F and inverse class-F schemes for -band base station application," in IEEE MTT-S Int. Microw. Symp. Dig., Jun. 2004, pp. 839-842.
19. Y. Suzuki, T. Hirota, and T. Nojima, "Highly efficient feed-forward amplifier using a class-F Doherty amplifier," in IEEE MTT-S Int. Microw. Symp. Dig., Jun. 2003, pp. 77-80.
20. J. Moon, Y. Y. Woo, and B. Kim, "A highly efficient Doherty power amplifier employing optimized carrier cell," in Proc. 39th Eur. Microw. Conf., Sep. 28-Oct. 2 2009, pp. 1720-1723.
21. K. Horiguchi, S. Ishizaka, T. Okano, M. Nakayama, H. Ryoji, Y. Isota, and T. Takagi, "Efficiency enhancement of 250 W Doherty power amplifier using virtual open stub techniques for UHF-band OFDM applications," in IEEE MTT-S Int. Microw. Symp. Dig., Jun. 2006, pp. 1356-1359.
22. N. Ui, H. Sano, and S. Sano, "A 80 W 2-stage GaN HEMT Doherty amplifier with50 dBc ACLR, 40% efficienecy, 32 dB gain with DPD for W-CDMA base station," in IEEE MTT-S Int. Microw. Symp. Dig., Jun. 2007, pp. 1259-1262.
23. R. Sweeney, "Practical magic," IEEE Microw. Mag., vol. 9, no. 2, pp. 73-82, Apr. 2008.
24. Y. Y.Woo, J. Kim, J. Yi, S. Hong, I. Kim, J. Moon, and B. Kim, "Adaptive digital feedback predistortion technique for linearizing power amplifier," IEEE Trans. Microw. Theory Tech., vol. 55, no. 5, pp. 932-940, May 2007. (Pubitemid 46725842)