Dissertation
Broadband circuit techniques for radio frequency power conversion
Power electronic converters are foundational to modern electrical systems, playing critical roles in transportation, medical devices, and industrial technologies. A central trend in their evolution is the push toward higher switching frequencies for greater power density and lower cost. This trend also enables new opportunities and capabilities in various radio frequency applications such as plasma generation, magnetic resonance imaging (MRI), and induction heating. However, conventional high-frequency converters suffer from significant efficiency loss when faced with variations in frequency or load, limiting their performance and capabilities. To overcome these challenges, this work focuses on radio frequency power inverters and develops broadband circuit techniques for efficient power conversion across wide frequency ranges and varying load conditions. A general framework is introduced for designing broadband inverters based on linear time-variant switched network analysis is introduced. Building on this foundation, impedance transformation methods are proposed to further enhance broadband inverter performance: the Resistance Regulation Network (RRN) for frequency-controlled power modulation, and the Frequency-Tuning Matching Network (FTMN) for robust power delivery to dynamic loads. Additionally, a broadband resonant gate driver is presented to reduce gate losses and enable scalable high-power operation
Publications
- On the General Design Methodology for Broadband Radio Frequency Power Inverters ∙ IEEE TPELS ∙ 2026
- On The Design of Switched-Mode Broadband High Frequency Power Inverters ∙ IEEE COMPEL ∙ 2025
- Current Mode Control for High Frequency Piezoelectric Resonator-Based DC–DC Converters ∙ IEEE TPELS ∙ 2025
- A 50-MHz GaN Class-Φ2 Power Amplifier With a CMOS-Based Resonant Gate Driver ∙ IEEE Microwave Magazine ∙ 2025
- Broadband High-Frequency Power Modulation With Resistance Regulation Network ∙ IEEE TPELS ∙ 2025
- Broadband High Frequency Power Conversion With Frequency-Tuning Matching Network ∙ IEEE OJPE ∙ 2025
- Design of a High-Voltage Low-Ripple Converter With High-Frequency Dickson Multipliers ∙ IEEE TIE ∙ 2025
- High-Speed Power Modulation of a Series-Stacked Φ2 RF Power Amplifier ∙ IEEE COMPEL ∙ 2024
- Piezoelectric Based Class-E Resonant Inverter for Driving Surface Dielectric Barrier Discharge Plasma ∙ IEEE ECCE Asia ∙ 2024
- Class-Φ2 Power Amplifier With Resonant Gate Driver: High-Efficiency Power Amplifier for 50 MHz ∙ IEEE Microwave Magazine ∙ 2024
- Frequency-tuning Matching Network for Load-varying Applications ∙ IEEE APEC ∙ 2024
- Comparison of GaN and Si Devices in a 50 MHz Class Φ2 Converter ∙ IEEE APEC ∙ 2024
- 1 kW 6.78 MHz Push-Pull Φ2 Amplifier for Induction Heating ∙ IEEE APEC ∙ 2024
- A Low-Ripple High-Frequency High-Voltage Power Supply for Ion Pumps ∙ IEEE APEC ∙ 2023
- Class DE Switch-Mode Power Amplifier Using GaN Power HEMTs: High-Efficiency Power Amplifier for 13.56 MHz ∙ IEEE Microwave Magazine ∙ 2022
- A High Frequency Resonant Gate Driver for SiC MOSFETs ∙ IEEE COMPEL ∙ 2021
- Cascode GaN/SiC: A Wide-Bandgap Heterogenous Power Device for High-Frequency Applications ∙ IEEE TPELS ∙ 2020
- Cascode GaN/SiC Power Device for MHz Switching ∙ IEEE APEC ∙ 2019
- On the Techniques to Utilize SiC Power Devices in High- and Very High-Frequency Power Converters ∙ IEEE TPELS ∙ 2019
Contact
- yezc15@stanford.edu