Unequal-cells-based GaN HEMT doherty amplifier with an extended efficiency range

IEEE Microwave and Wireless Components Letters

Volumn 18, Issue 8, 2008, Pages 536-538

  Lee, Yong Sub ^b   Lee, Mun Woo ^b   Jeong, Yoon Ha ^a,b  

^a IEEE

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

Author keywords

Adjacent channel leakage ratio (ACLR); Doherty power amplifier (DPA); Efficiency; Gallium nitride (GaN); Wide band code division multiple access (WCDMA)

Indexed keywords

GALLIUM NITRIDE; POWER AMPLIFIERS; SEMICONDUCTING GALLIUM;

ADJACENT CHANNEL LEAKAGE RATIO (ACLR); DOHERTY AMPLIFIERS; DOHERTY POWER AMPLIFIER; DOHERTY POWER AMPLIFIER (DPA); EFFICIENCY; GALLIUM NITRIDE (GAN); GAN-HEMT; HIGH-EFFICIENCY; OUTPUT POWERS; SATURATION POWER; WIDE-BAND CODE DIVISION MULTIPLE ACCESS (WCDMA);

GALLIUM ALLOYS;

EID: 49249112377     PISSN: 15311309     EISSN: None     Source Type: Journal    
DOI: 10.1109/LMWC.2008.2001015     Document Type: Article

References (6)

1. J. Kim, J. Cha, I. Kim, and B. Kim, "Optimum operation of asymmetrical -cells-based linear Doherty amplifiers-Uneven power drive and power matching." IEEE Trans. Microw. Theory Tech.. vol. 53, no. 5, pp. 1802-1809, May 2005.
2. Y. Yang, J. Cha, B. Shin, and B. Kim, "A microwave Doherty amplifier employing envelope tracking technique for high efficiency and linearity," IEEE Microw. Wireless Compon. Lett., vol. 13, no. 9, pp. 370-372, Sep. 2003.
3. J. Kim, B. Kim, and Y. Y. Woo, "Advanced design of linear Doherty amplifier for high efficiency using saturation amplifier." in IEEE MTT-S Int. Dig., 2007, pp. 1573-1576.
4. Y. Yang, J. Cha, B. Shin, and B. Kim, "A fully matched N-way Doherty amplifier with optimized linearity," IEEE Trans. Microw. Theory Tech., vol. 51, no. 3. pp. 986-993, Mar. 2003.
5. N. Srirattana, A. Raghavan, D. Heo, P. E. Allen, and J. Lasker, "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. 2005.
6. M. Iwamoto. A. Williams, C. Pin-Fan. 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.