Design and control optimisation of a novel bypass-embedded multilevel multicell inverter for hybrid electric vehicle drives

J Li - 2020 IEEE 11th International Symposium on Power …, 2020 - ieeexplore.ieee.org
A novel bypass-embedded multilevel multicell inverter is proposed with manipulation of
bidirectional flow of currents targeting electric motor drives and regenerative braking (battery …

All-optically Controlled Microwave Analog Phase Shifter with Insertion Losses Balancing.

J Li - Engineering Letters, 2020 - search.ebscohost.com
An all-optically driven microwave phase shifter is designed and experimentally
demonstrated for 1–10 GHz. The proposed optical addressing is realised in nematic liquid …

Millimetre-wave beam steering with analog-resolution and minimised distortion based on liquid crystals tunable delay lines with enhanced signal-to-noise ratios

J Li - Millimetre Wave and Terahertz Sensors and …, 2020 - spiedigitallibrary.org
Millimetre-wave beam-steering distortions are due mainly to unbalanced feeding amplitudes
among the delay lines network. To compensate for this, active amplifiers or attenuators are …

60 GHz optimised nickel-free gold-plated enclosed coplanar waveguide liquid crystal phase shifter

J Li - 2020 IEEE MTT-S International Microwave Workshop …, 2020 - ieeexplore.ieee.org
A novel nickel-free gold-plated enclosed coplanar waveguide is experimentally
demonstrated for a liquid crystal tunable delay line phase shifter at 60 GHz. By numerical …

Bias tees integrated liquid crystals inverted microstrip phase shifter for phased array feeds

J Li - 2020 21st International Conference on Electronic …, 2020 - ieeexplore.ieee.org
Microwave phase shifters based on tunable dielectrics such as nematic liquid crystals (NLC)
have attracted considerable research attention in the last two decades. To electronically …

Optically steerable phased array enabling technology based on mesogenic azobenzene liquid crystals for starlink towards 6G

J Li - 2020 IEEE Asia-Pacific Microwave Conference (APMC), 2020 - ieeexplore.ieee.org
We designed, fabricated, and characterised novel all-optically driven passive phase shifters
(0-π) at X band based on nematic liquid crystals (GT3) admixed with mesogenic azo dye …

Wideband PCB-to-connectors impedance adapters for liquid crystal-based low-loss phase shifters

J Li - 2020 50th European Microwave Conference (EuMC), 2021 - ieeexplore.ieee.org
This paper presents the design, optimisation and experimental verification of a wideband
impedance adapting network for a liquid crystal (LC) based electronically-tuned phase …

Will 'Liquid-Crystal-Based Floating-Electrode-Free Coplanar Waveguide Phase Shifter With an Additional Liquid-Crystal Layer for 28-GHz Applications' Work?

J Li - Engineering Letters, 2023 - papers.ssrn.com
The growing interest in the modulation of phase (and amplitude) of microwave and
millimeter-wave signals has been spurred by the emerging 5G/6G phased-array beam …

Machine learning and digital twinning enabled liquid crystals mm-wave reconfigurable devices design and systems operation

J Li - 2022 IEEE MTT-S International Microwave Workshop …, 2022 - ieeexplore.ieee.org
Machine learning is a versatile but little-understood approach in tunable RF electronics. This
paper serves as the first to investigate the feasibility of taking inspiration from machine …

Effective Dielectric Constant Benchmark of 60 GHz Liquid Crystal-Filled Coaxial Delay Line

J Li, H Li - 2024 IEEE International Conference on …, 2024 - ieeexplore.ieee.org
Gaining exact knowledge of the effective permittivity for liquid crystal-filled delay lines (LCF-
DL) is fundamental to the precise prediction of the variable time-delaying functionality. This …