Analysis of a fully matched saturated Doherty amplifier with excellent efficiency
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- Title
- Analysis of a fully matched saturated Doherty amplifier with excellent efficiency
- Authors
- Kim, J; Moon, J; Woo, YY; Hong, S; Kim, J; Kim, J; Kim, B
- Date Issued
- 2008-02
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGI
- Abstract
- A saturated Doherty amplifier based on class-F amplifiers is analyzed in terms of its load modulation behavior, efficiency, and linearity. Simulations included the amplitude ratio and phase difference between the fundamental and third harmonic voltages, the current/voltage waveforms, load lines, and the third-order intermodulation amplitudes/phases of the carrier and peaking amplifiers. The saturated Doherty power amplifier was implemented using two Eudyna EGN010MK GaN HEMTs with a 10-W peak envelope power. For a 2.14-GHz forward-link wideband code-division multiple-access signal, the Doherty amplifier delivers an excellent efficiency of 52.4% with an acceptable linearity of - 28.3 dBc at an average output power of 36 dBm. Moreover, the amplifier can provide the high linearity performance of - 50 dBc using the digital feedback predistortion technique.
- Keywords
- Doherty amplifier; efficiency; linearization; power amplifier (PA); wideband code division multiple access (WCDMA); F POWER-AMPLIFIERS; TRANSMITTER; LINEARITY
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/22934
- DOI
- 10.1109/TMTT.2007.914361
- ISSN
- 0018-9480
- Article Type
- Article
- Citation
- IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. 56, no. 2, page. 328 - 338, 2008-02
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