A5007767104- Advanced Antenna and Metasurface Technologies
- Metamaterials and Metasurfaces Applications
- Antenna Design and Analysis
- Gas Sensing Nanomaterials and Sensors
- Electromagnetic Scattering and Analysis
- Catalytic Processes in Materials Science
- Graphene research and applications
- Topological Materials and Phenomena
- Advanced Data Processing Techniques
- Catalytic Cross-Coupling Reactions
- Catalytic C–H Functionalization Methods
- Evaluation and Optimization Models
- Economic Development and Regional Competitiveness
- Asymmetric Hydrogenation and Catalysis
- Robotics and Sensor-Based Localization
- 2D Materials and Applications
- Corporate Finance and Governance
- Advanced Photocatalysis Techniques
- Orbital Angular Momentum in Optics
Xi'an Jiaotong University
2024-2025
Harbin Institute of Technology
2024
Huaibei Normal University
2023
King University
2014
In this paper, we present a metal-only transmission metasurface adopting dual-layer elements with I-shaped grooves etched on each layer, which is designed for orbital angular momentum (OAM) generation. The special arrangement of the results in wider phase compensation range, and by varying length grooves, full 360° coverage amplitude more than −2 dB can be achieved at 10 GHz. As proof concept, composed 400 designed, fabricated, measured. simulated measured suggest that OAM transmitted waves...
In this paper, the concept of anisotropic impedance holographic metasurface is proposed and validated by realizing imaging with multipoint focusing techniques in near-field areas at radio frequency domain. Combining microwave leaky-wave theory principle, mapped geometrical patterns can be constructed based on correspondence between meta-atom structural parameters equivalent scalar impedances modulated metasurface. Different from conventional space-wave metasurfaces, surface-wave-based fed...
Abstract This paper presents a kind of metal-only anisotropic impedance holographic metasurfaces (MOAIHMs) made up periodic wavelength size-variable meta-atoms. The proposed meta-atom has only two metal layers, i.e., upper patterned layer carved with cylindrical hollows connecting by narrow cuboid, and lower grounded layer. layers are separated an air gap. anisotropy this tensor can be skillfully realized simultaneously controlling the radius orientation angle cuboid. relationship between...
In this communication, a dual-band, orthogonal polarization transmission metasurface antenna operating at 6.5 GHz and 9.5 is proposed. The element of transmitarray composed only two identical layers metal plates, with air medium filling the space between upper lower layers. Each layer has four sets staggered I-slots, thus ensuring dual-frequency operation. Moreover proposed overcomes challenge achieving full 360-degree phase shift in dual-layer metal-only structures without any additional...
Great efforts recently have advanced the investigation of high-mobility two-dimensional semiconductor Bi2O2Se toward its device applications, which arouses more questions to clarify intriguing charge behaviors Bi2O2Se. The present work introduced Sm atoms partially substitute Bi for modulating properties supposed conduction Bi2O2 layer. A behavior with double transport channels was then discovered, one significantly suppressed by doping, but another exempt. Such a selective suppression in...
We investigate the effects of bank-firm relationships and corporate political activities on SMEs' credit rating probability acquiring loans from banks. Analyses show that strength bank-initiated relationship is positively correlated with firms' rating; personal contact between firm bank negatively associated rating, which in accordance what we call dark side close relationships. Empirical results also among various manipulation activities, only cognitive related to loan acquisition. In...
A highly selective remote C(sp3)-H acetonation of N-(quinolin-8-yl)amide scaffolds at the C5-position under microwave irradiation has been developed. In absence a transition-metal-catalyst, benzoyl peroxide (BPO)-promoted cross-dehydrogenation coupling (CDC) N-(quinolin-8-yl)amides with acetone/acetonitrile occurred smoothly to generate corresponding 5-acetonated/acetonitriled in good yields. The transformation is operationally simple, rapid, easily scaled-up gram scale, and shows broad...