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Design of a Broadband Doherty Power Amplifier with a Graphical User Interface Tool

Gong, Pingzhu
http://rave.ohiolink.edu/etdc/view?acc_num=osu1658158564568844

Abstract Details

2022, Master of Science, Ohio State University, Electrical and Computer Engineering.
A novel broadband Doherty Power Amplifier (DPA) design for 4G applications is presented with the aid of a modified version of DPA Graphical User Interface (GUI) Tool. Compared to the previous version, the new GUI uses Output Back-Off (OBO) as the input instead of the peak power ratio of the DPA Main and auxiliary PAs. Furthermore, the load impedance seen by the Main PA (MPA) at 2nd harmonic and 3rd harmonic can be directly controlled from the GUI. In this design, Main PA is operated under class F mode and the auxiliary PA is operated under Class C mode. The main PA is biased at -3.2 V at the gate (lower than typical values: -2.7 V ~ -3 V) to boost the efficiency. A new parasitic network with simple structure is extracted using OSU Embedding Model. Design procedures are stated as follows. Fundamental load impedances seen by both PAs are generated by GUI at Current source Reference Plane (CRP). Then, the Output Matching Network (OMN) is synthesized at CRP for both PAs separately. At last, the input matching network and the equal split Wilkinson power divider are designed to realize the broadband DPA. Electromagnetic (EM) Co-simulation result shows the DPA achieves 59.4-62.2% drain efficiency at 8-dB OBO at 1.5-2.2GHz with a gain of 10-13dB. The peak power range is between 43.7 dBm and 44.5 dBm. The THD and IM3 is around -15dB at back off power. The performance of the proposed DPA iii design is shown to be comparable to state-of-the-art designs, which indicates our DPA has a good performance.
Patrick Roblin (Advisor)
Wladimiro Villarroel (Committee Member)
47 p.
Electrical Engineering
Doherty power amplifier, broadband, Graphical user interface, parasitics, embedding model, high efficiency

Recommended Citations

Citations

  • Gong, P. (2022). Design of a Broadband Doherty Power Amplifier with a Graphical User Interface Tool [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1658158564568844

    APA Style (7th edition)

  • Gong, Pingzhu. Design of a Broadband Doherty Power Amplifier with a Graphical User Interface Tool. 2022. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1658158564568844.

    MLA Style (8th edition)

  • Gong, Pingzhu. "Design of a Broadband Doherty Power Amplifier with a Graphical User Interface Tool." Master's thesis, Ohio State University, 2022. http://rave.ohiolink.edu/etdc/view?acc_num=osu1658158564568844

    Chicago Manual of Style (17th edition)

osu1658158564568844
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© 2022, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.