A5046088247- Antenna Design and Analysis
- Metamaterials and Metasurfaces Applications
- Advanced Antenna and Metasurface Technologies
- Microwave Engineering and Waveguides
- Orbital Angular Momentum in Optics
- Plasmonic and Surface Plasmon Research
- Antenna Design and Optimization
- Radio Frequency Integrated Circuit Design
- Mobile Learning in Education
- Photonic Crystals and Applications
- Near-Field Optical Microscopy
- Millimeter-Wave Propagation and Modeling
- Full-Duplex Wireless Communications
Shanghai Jiao Tong University
2015-2025
Polytechnique Montréal
2019-2024
Shanghai University of International Business and Economics
2017
A reconfigurable graphene reflectarray is proposed for the generation of vortex radio waves at THz. First, a simple sectored circular reflective surface model with plane wave normal incidence constructed to illustrate how can be generated. Then, cell examined demonstrate that reflection coefficient controlled by changing chemical potential and size patch. Next, realized cells are properly sized, arranged, biased satisfy required coefficients various modes waves. Finally, excited horn...
Affective education has been the new educational pattern under modern ubiquitous learning environment. Especially in mobile learning, how to effectively construct affective optimize and enhance teaching effectiveness attracted many scholars attention. This paper presents framework of based on learner?s interest emotion recognition. Learner?s voice, text behavior log data are firstly preprocessed, then association rules analysis, SO-PMI (Semantic Orientation-Pointwise Mutual Information)...
A theory mainly based on physical optics is developed to analyze reflective phase-shifting surfaces (PSSs) for generating vortex radio waves. The theoretically calculated radiation patterns and phase fronts closely agree with those simulated from a high-frequency structure simulator the circular disk annular ring PSS various dimensions. This enables computation of these high efficiency, which indicates its potential rapid design optimization this important type surfaces.
The propagation characteristics of double-sided, graphene-based waveguides are investigated in detail this study. Given the isotropic or anisotropic conductivities graphene, dispersion equations these complex and can be derived through analytical expressions obtained with mode-matching techniques. Graphene tuned via application an external electrostatic magnetostatic bias field; therefore, novel reconfiguration possibilities interest to researchers considered analyzed comprehensively....
A reconfigurable graphene reflectarray (RGRA) is proposed with the electrically switchable focus for incident (quasi-)spherical waves. The geometry- and chemical potential-dependent reflection phase explored reflective patch cells, which further assigned to specific parts of RGRA. full-wave simulated results demonstrate that structure can provide a dynamically controllable at 1.5 THz. peak realized gain radiation efficiency are higher than 22 dBi 65%, respectively, both short long focuses 3.2λ 8.0λ.
A 2 × 3 substrate integrated waveguide (SIW) H-plane hybrid coupler operating at 28 GHz with constant phase shifting outputs is proposed. This proposed 6-port junction can equally divide the input power into three output ports, a relative difference +120°, 0°, -120°. Simulation results indicate that within 5% bandwidth, our designs achieve good impedance matching high isolation, and equal division having shifting.
This paper provides a succinct and feasible theoretical analysis of reflected plate for the generation orbital angular momentum (OAM) mode. The is formed by several sectors with specific reflection phases. Ansoft HFSS simulated results agree well those proposed theory.