- Volume 26 Issue 9
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High-Efficiency GaN-HEMT Doherty Power Amplifier with Compact Harmonic Control Networks
간단한 구조의 고조파 정합 네트워크를 갖는 GaN-HEMT 고효율 Doherty 전력증폭기
- Kim, Yoonjae ;
- Kim, Minseok ;
- Kang, Hyunuk ;
- Cho, Sooho ;
- Bae, Jongseok ;
- Lee, Hwiseob ;
- Yang, Youngoo
- Received : 2015.07.03
- Accepted : 2015.09.22
- Published : 2015.09.30
This paper presents a Doherty power amplifier(DPA) operating in the 2.6 GHz band for long term evolution(LTE) systems. In order to achieve high efficiency, second and third harmonic impedances are controlled using a compact output matching network. The DPA was implemented using a gallium nitride high electron mobility transistor(GaN-HEMT) that has many advantages, such as high power density and high efficiency. The implemented DPA was measured using an LTE downlink signal with a 10 MHz bandwidth and 6.5 dB PAPR. The implemented DPA exhibited a gain of 13.1 dB, a power-added efficiency(PAE) of 57.6 %, and an ACLR of -25.7 dBc at an average output power of 33.4 dBm.
Doherty Power Amplifier;Harmonic Impedance Control;GaN-HEMT;LTE
- S. C. Cripps, RF Power Amplifiers for Wireless Communications. Norwood, MA: Artech House, 2006.
- M. Seo, M. Song, J. Gu, H. Kim, J. Ham, C. Park, and Y. Yang, "Three-stage Doherty amplifier with uneven input splitter", Microw. and Opt. Tech. Lett., vol. 55, no. 6, pp. 1405-1409, Jun. 2013. https://doi.org/10.1002/mop.27581
- M. Seo, H. Lee, J. Gu, and Y. Yang, "Doherty power amplifier using a compact load network for bandwidth extension", in Asia-Pacific Microw. Conf., Nov. 2013, pp. 742-744.
- 김정준, 문정환, 김장헌, 김일두, 전명수, 김범만, "2.14- GHz 대역 고효율 class-F 전력 증폭기 개발", 한국전자파학회논문지, 18(8), pp. 873-879, 2007년 8월.
- A. Markos, P. Colantonio, F. Giannini, R. Giofre, M. Imbimbo, and G. Kompa, "A 6 W uneven Doherty power amplifier in GaN technology", in Proc. 37th Eur. Microw. Conf., pp. 299-302, Oct. 2007.
- R. Darraji, F. M. Ghannouchi, "Digital Doherty amplifier with enhanced efficiency and extended range", IEEE Trans. Microw. Theory Tech., vol. 59, no. 11, pp. 2898- 2909, Nov. 2011. https://doi.org/10.1109/TMTT.2011.2166122
- J. Kim, J. Son, J. Moon, and B. Kim, "A saturated Doherty power amplifier based on saturated amplifier", IEEE Microw. Wireless Compon. Lett., vol. 20, no. 2, pp. 109- 111, Feb. 2010. https://doi.org/10.1109/LMWC.2009.2038554
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