Electronics Research Laboratory
Dept. of Microelectronics

Lei Zhou

Publications

  1. A 90W High-Efficiency Four-Way Doherty Power Amplifier with 37.8% Fractional Bandwidth over a 15 dB Power Back-Off Range
    Zhou, Lei; Liu, Lianbo; Pelk, Marco; Qureshi, Abdul Raheem; de Vreede, Leo C.N.;
    In 2025 IEEE/MTT-S International Microwave Symposium - IMS 2025,
    pp. 53-56, 2025. DOI: 10.1109/IMS40360.2025.11103877
    Keywords: ... Radio frequency;Power measurement;Transmitters;Spectral efficiency;Power amplifiers;Distance measurement;Microwave amplifiers;Power generation;Wideband;Next generation networking;Doherty;power amplifier;N-way DPA;fractional bandwidth;efficiency;power back-off;GaN;mixed-signal.

  2. A Highly Linear Wideband Polar Class-E CMOS Digital Doherty Power Amplifier
    Hashemi, Mohsen; Zhou, Lei; Shen, Yiyu; de Vreede, Leo C. N.;
    IEEE Transactions on Microwave Theory and Techniques,
    Volume 67, Issue 10, pp. 4232-4245, 2019. DOI: 10.1109/TMTT.2019.2933204
    Keywords: ... Wideband;Impedance;Radio frequency;Inverters;Baluns;Power generation;CMOS;digital power amplifier (DPA);digital predistortion (DPD);Doherty PA;efficient;linear;multiphase RF-clocking;nonlinear sizing;overdrive-voltage control;wideband.

  3. Highly efficient and linear class-E CMOS digital power amplifier using a compensated Marchand balun and circuit-level linearization achieving 67% peak DE and −40dBc ACLR without DPD
    Hashemi, Mohsen; Zhou, Lei; Shen, Yiyu; Mehrpoo, Mohammadreza; de Vreede, Leo;
    In 2017 IEEE MTT-S International Microwave Symposium (IMS),
    pp. 2025-2028, 2017. DOI: 10.1109/MWSYM.2017.8059066
    Keywords: ... Radio frequency;Wideband;Switches;System-on-chip;Clocks;Harmonic analysis;Class-E;CMOS;digital PA;DPD-less;efficient;linear;wideband.

  4. A fully-integrated digital-intensive polar Doherty transmitter
    Shen, Yiyu; Mehrpoo, Mohammadreza; Hashemi, Mohsen; Polushkin, Michael; Zhou, Lei; Acar, Mustafa; van Leuken, Rene; Alavi, Morteza S.; de Vreede, Leo;
    In 2017 IEEE Radio Frequency Integrated Circuits Symposium (RFIC),
    pp. 196-199, 2017. DOI: 10.1109/RFIC.2017.7969051
    Keywords: ... Phase modulation;System-on-chip;Baseband;Transmitters;Topology;Clocks;Power generation;Doherty transmitter;digital-intensive polar;efficiency enhancement;DPD;phase modulator;on-chip combiner.

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