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Recent Developments of Dual-Band Doherty Power Amplifiers for Upcoming Mobile Communications Systems
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A Survey on RF and Microwave Doherty Power Amplifier for Mobile Handset Applications

1
Instituto de Telecomunicações, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
2
Departamento de Electrónica, Telecomunicações e Informática, Universidade de Aveiro, 3810-193 Aveiro, Portugal
3
Faculty of Engineering and Informatics, Bradford University, Bradford BD7 1DP, UK
4
Department of Signal Theory and Communications, University of Vigo, 36310 Vigo, Spain
*
Authors to whom correspondence should be addressed.
Electronics 2019, 8(6), 717; https://doi.org/10.3390/electronics8060717
Received: 2 May 2019 / Revised: 17 June 2019 / Accepted: 19 June 2019 / Published: 25 June 2019
(This article belongs to the Special Issue Recent Technical Developments in Energy-Efficient 5G Mobile Cells)
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Abstract

This survey addresses the cutting-edge load modulation microwave and radio frequency power amplifiers for next-generation wireless communication standards. The basic operational principle of the Doherty amplifier and its defective behavior that has been originated by transistor characteristics will be presented. Moreover, advance design architectures for enhancing the Doherty power amplifier’s performance in terms of higher efficiency and wider bandwidth characteristics, as well as the compact design techniques of Doherty amplifier that meets the requirements of legacy 5G handset applications, will be discussed. View Full-Text
Keywords: High power amplifiers; high efficiency; Doherty power amplifier; 4G; 5G; GaN-HEMT High power amplifiers; high efficiency; Doherty power amplifier; 4G; 5G; GaN-HEMT
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Sajedin, M.; Elfergani, I.; Rodriguez, J.; Abd-Alhameed, R.; Barciela, M.F. A Survey on RF and Microwave Doherty Power Amplifier for Mobile Handset Applications. Electronics 2019, 8, 717.

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