Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart Planning, IMDC-SDSP 2020, Cyperspace, 28-30 June 2020

Research Article

Three-Way Doherty Power Amplifier Using Class-F Amplifier for More Efficient Mobile Communications

Download338 downloads
  • @INPROCEEDINGS{10.4108/eai.28-6-2020.2297908,
        author={Ahmed  Abdulkhaleq and Maan  Yahya and Maryam  Sajedin and Yasir  Al-Yasir and Naser  Ojaroudi Parchin and Ashwain  Rayit and Issa  Elfergani and Raed  Abd-Alhameed and Jonothan  Rodriguez},
        title={Three-Way Doherty Power Amplifier Using Class-F Amplifier for More Efficient Mobile Communications},
        proceedings={Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart Planning, IMDC-SDSP 2020, Cyperspace, 28-30 June 2020},
        publisher={EAI},
        proceedings_a={IMDC-SDSP},
        year={2020},
        month={9},
        keywords={three way doherty amplifier class f efficiency back-off output power},
        doi={10.4108/eai.28-6-2020.2297908}
    }
    
  • Ahmed Abdulkhaleq
    Maan Yahya
    Maryam Sajedin
    Yasir Al-Yasir
    Naser Ojaroudi Parchin
    Ashwain Rayit
    Issa Elfergani
    Raed Abd-Alhameed
    Jonothan Rodriguez
    Year: 2020
    Three-Way Doherty Power Amplifier Using Class-F Amplifier for More Efficient Mobile Communications
    IMDC-SDSP
    EAI
    DOI: 10.4108/eai.28-6-2020.2297908
Ahmed Abdulkhaleq1,*, Maan Yahya2, Maryam Sajedin3, Yasir Al-Yasir4, Naser Ojaroudi Parchin4, Ashwain Rayit5, Issa Elfergani3, Raed Abd-Alhameed4, Jonothan Rodriguez3
  • 1: 1.SARAS Technology, Leeds, UK,2. School of Engineering, Design and Technology, University of Bradford, Bradford, UK.
  • 2: Ninevah Technical Institute, Northern Technical University, Mosul, Iraq
  • 3: Mobile Systems Group, Instituto de Telecomunicações, Aveiro, Portugal
  • 4: School of Engineering, Design and Technology, University of Bradford, Bradford, UK.
  • 5: SARAS Technology, Leeds, UK
*Contact email: a.abd@sarastech.co.uk

Abstract

An efficient three-way Doherty amplifier is designed and simulated using Microwave Office software, where the amplifier is targeting 3.4-3.8 GHz for 5G applications using three GaN HEMT transistors (6W, 25W and 45W) to achieve a 76W peak power. Each amplifier was designed to work as a class F amplifier to improve the efficiency of the designed amplifier. In addition, A new impedance modulation configuration is used, where a gain of 12.5 dB was achieved over the design band, in addition, a 13 dB back-off efficiency was achieved with 50-60% drain efficiency. Changing the location of the peaking amplifier or changing the operation sequence of the peaking amplifier can achieve good efficiency at the back-off region. There was an efficiency improvement of 10% at the back off by utilizing a class F amplifier comparing with the classical Doherty design.