A compact fully differential Doherty power amplifier
Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Title of host publication | 2013 IEEE International Wireless Symposium, IWS 2013 |
Publication status | Published - 2013 |
Conference
Title | 2013 IEEE International Wireless Symposium, IWS 2013 |
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Place | China |
City | Beijing |
Period | 14 - 18 April 2013 |
Link(s)
Abstract
In this paper, a compact triple-transistor fully differential Doherty power amplifier (DPA) is investigated. Three active devices are combined in a very judicious way to amplify the differential signal in a way like what a typical Doherty amplifier does. Particularly, two out-of-phase carrier PAs are applied to operate in the low-power region for high efficiency. On the other hand, only one peaking PA is used in the high-power region, which shares its output evenly with the two carriers. The reduction of transistor number from four for a classic differential DPA to three greatly cuts down the realization cost and compacts the overall circuit. Theoretical analysis is given for deep understanding of the operation principle. To demonstrate the proposed technique, a prototype is implemented based on Cree's CGH40010 GaN HEMTs. Experimental result shows that 73% and 63% drain efficiencies are achieved at peak power and 6-dB back-off point, respectively. © 2013 IEEE.
Research Area(s)
- 180° hybrid, Differential power amplifier, Doherty amplifier, load modulation network, power-added efficiency (PAE)
Citation Format(s)
A compact fully differential Doherty power amplifier. / Chen, Shichang; Xue, Quan.
2013 IEEE International Wireless Symposium, IWS 2013. 2013. 6616784.
2013 IEEE International Wireless Symposium, IWS 2013. 2013. 6616784.
Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review