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

Research Article

Mutual Coupling Effect on Classical Three-way Doherty Amplifier for 5G Applications

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  • @INPROCEEDINGS{10.4108/eai.28-6-2020.2298144,
        author={Ahmed  Abdulkhaleq and Khalid  Hameed and Maan  Yahya and Yasir  Al-Yasir and Naser  Ojaroudi Parchin and Syed  Syed Anera and Ashwain  Rayit and Raed  Abd-Alhameed},
        title={Mutual Coupling Effect on Classical Three-way Doherty Amplifier for 5G Applications},
        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; efficiency; antenna; beamforming; vswr; output power},
        doi={10.4108/eai.28-6-2020.2298144}
    }
    
  • Ahmed Abdulkhaleq
    Khalid Hameed
    Maan Yahya
    Yasir Al-Yasir
    Naser Ojaroudi Parchin
    Syed Syed Anera
    Ashwain Rayit
    Raed Abd-Alhameed
    Year: 2020
    Mutual Coupling Effect on Classical Three-way Doherty Amplifier for 5G Applications
    IMDC-SDSP
    EAI
    DOI: 10.4108/eai.28-6-2020.2298144
Ahmed Abdulkhaleq1,*, Khalid Hameed2, Maan Yahya3, Yasir Al-Yasir2, Naser Ojaroudi Parchin2, Syed Syed Anera1, Ashwain Rayit1, Raed Abd-Alhameed2
  • 1: SARAS Technology, Leeds, UK
  • 2: School of Engineering, Design and Technology, University of Bradford, Bradford, UK.
  • 3: Ninevah Technical Institute, Northern Technical University, Mosul, Iraq
*Contact email: a.abd@sarastech.co.uk

Abstract

A three-way Doherty power amplifier targeting sub 6-GHz for 5G applications is designed using three 6W GaN HEMT transistors to achieve an 18W peak power with an 8.5 dB back-off efficiency. The amplifier achieved an efficiency of 55%, 63% and 80% at 8.5, 6, and 0 dB respectively from the peak power. The designed amplifier target 3.4-3.8 GHz band with a 13 dB of gain over the design band. In addition, the amplifier was tested for different VSWRs considering the antenna impedance changing due to beamforming. There was an average of 3.35 dBm variation in the output power and 20% efficiency variation for different VSWRs at both the peaking and back-off regions. The structure of three-way Doherty amplifier or sequence of turning the peaking amplifiers on affects the amplifier performance for different VSWRs.