Zenglong Zhao

ORCID: 0009-0000-2020-2695
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About
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Research Areas
  • Radio Frequency Integrated Circuit Design
  • Advanced Power Amplifier Design
  • Microwave Engineering and Waveguides
  • GaN-based semiconductor devices and materials
  • Advanced DC-DC Converters
  • Analog and Mixed-Signal Circuit Design
  • Wireless Body Area Networks
  • Photonic and Optical Devices
  • Semiconductor Quantum Structures and Devices
  • Superconducting and THz Device Technology
  • Electrostatic Discharge in Electronics
  • Antenna Design and Optimization
  • Advancements in Semiconductor Devices and Circuit Design
  • Multilevel Inverters and Converters
  • Microgrid Control and Optimization
  • Antenna Design and Analysis
  • Silicon Carbide Semiconductor Technologies

Tianjin University
2022-2025

Nankai University
2024

This study presents a hard-switching full-bridge DC-DC converter with synchronous rectification based on Gallium Nitride (GaN) transistors to evaluate the advantages of GaN devices in power supplies. In comparison traditional silicon-based devices, are utilized both primary and secondary stages converter, exploiting GaN’s lower on-resistance enhance performance. The operates at switching frequency 300 kHz, an input voltage range 36 V 75 V, delivering output 28 V/42 A. Experimental results...

10.3390/jlpea15020025 article EN cc-by Journal of Low Power Electronics and Applications 2025-04-22

This article presents the frequency-domain-based modified impedance tuning analysis (ITA) method and its demonstration in designing a class-Ф <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> dc–dc converter with load-independent zero voltage switching (ZVS) characteristics <italic xmlns:xlink="http://www.w3.org/1999/xlink">.</i> By adjusting second-order harmonic voltage, near trapezial drain-to-source (...

10.1109/tpel.2023.3314445 article EN IEEE Transactions on Power Electronics 2023-09-12

To achieve simple topology and easy controllability, this paper presents a Class-E converter adopting the proposed switchable-coupled-inductor input-regulating (SCI-IR) method to constant output voltage under variable inputs. In comparison other regulating or control schemes, features circuit structure incurs negligible power losses during input-regulation process. By analysing circuits with resonance tank at steady-state operations, we formulate SCI-IR design parameters procedures,...

10.1016/j.mejo.2024.106219 article EN Microelectronics Journal 2024-04-29

10.1109/iws58240.2023.10222899 article EN 2018 IEEE MTT-S International Wireless Symposium (IWS) 2023-05-14

This brief presents a 220-GHz five-stage differential amplifier in IHP SG13G2 0.13- <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\mu \text{m}$ </tex-math></inline-formula> BiCMOS technology. The employs multi-coupling inductors and transmission lines at the inter-stage to perform high-gain, high-robustness miniaturization. compact used notation="LaTeX">$G_{\mathrm{ m}}$ -boosting technique noise...

10.1109/tcsii.2023.3324259 article EN IEEE Transactions on Circuits & Systems II Express Briefs 2023-10-12

This paper proposes a wideband low noise amplifier adopting feedback networks to improve gain and performance. In the proposed work, dual-path of complementary NMOS PMOS configuration boosts common-gate stage, which reduces power consumption contributes input impedance matching simultaneously. Fabricated in SMIC 55nm RF-CMOS technology, simulated results indicate that S <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">21</inf> is 12.8 dB, figure...

10.1109/imws-amp54652.2022.10107026 article EN 2021 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP) 2022-11-27
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