A5017550688- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Metamaterials and Metasurfaces Applications
- Microwave Engineering and Waveguides
- Energy Harvesting in Wireless Networks
- Graphene research and applications
- Electromagnetic wave absorption materials
- Advanced Sensor and Energy Harvesting Materials
- Plasmonic and Surface Plasmon Research
- Radio Frequency Integrated Circuit Design
- Advancements in PLL and VCO Technologies
- Photonic and Optical Devices
- Acute Ischemic Stroke Management
- Nanomaterials and Printing Technologies
- Photonic Crystals and Applications
- RFID technology advancements
- Antenna Design and Optimization
- Optical Coatings and Gratings
- Graphene and Nanomaterials Applications
- Full-Duplex Wireless Communications
- Electromagnetic Compatibility and Noise Suppression
- Cerebrovascular and Carotid Artery Diseases
- Electromagnetic Compatibility and Measurements
- Quantum optics and atomic interactions
- Electrohydrodynamics and Fluid Dynamics
Wannan Medical College
2022-2025
First Affiliated Hospital of Wannan Medical College
2022-2025
National University of Defense Technology
2013-2024
University of Manchester
2014-2018
Shanghai University
2003
In this paper, we report highly conductive, flexible, light weight and low cost printed graphene for wireless wearable communications applications. As a proof of concept, enabled transmission lines antennas on paper substrates were designed, fabricated characterized. To explore its potentials in applications, mechanically flexible under various bended cases experimentally studied. The measurement results demonstrate that the can be used RF signal transmitting, radiating receiving, which...
In this paper, we demonstrate realization of printable radio frequency identification (RFID) antenna by low temperature processing graphene ink. The required ultra-low resistance is achieved rolling compression binder-free laminate. With compression, the conductivity laminate increased more than 50 times compared to that as-deposited one. Graphene with 4.3 × 104 S/m and sheet 3.8 Ω/sq (with thickness 6 μm) presented. Moreover, formation from ink reported here simple can be carried out in...
Tirofiban is a highly selective nonpeptide antagonist of glycoprotein IIb/IIIa receptor, which reversibly inhibits platelet aggregation. It remains uncertain whether intravenous tirofiban effective to improve functional outcomes for patients with large vessel occlusion ischemic stroke undergoing endovascular thrombectomy.To assess the efficacy and adverse events before thrombectomy acute secondary occlusion.This investigator-initiated, randomized, double-blind, placebo-controlled trial was...
In this letter, a graphene nanoflakes printed antenna is presented. Graphene conductive ink has been screenprinted on paper substrate and compressed to achieve the conductivity of 0.43 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sup> S/m. Low-profile meandered-line dipole fabricated as proof concept due its electrically small size simple structure. The maximum gain measured be -4 dBi, -10-dB bandwidth ranges from 984 1052 MHz...
In this letter, a new method of energy selective surface (ESS) is presented for adaptive high-power microwave/electromagnetic pulse (HPM/EMP) protection, and self-actuated ESS designed with super-dense diode arrays. A prototype size 35 $\,\times\,$ cm $^2$ fabricated to evaluate the performance ESS, an experiment under HPM radiation carried out at 1.3 GHz. Results measurements show that has low-pass characteristic protection.
This study presents an effective method to model, analyse and design graphene metasurface‐based terahertz (THz) absorbers using equivalent circuit model approach. Broadband tunable consisting of metasurface metal‐backed dielectric layer have been designed based on the formulas derived from this approach verified by full‐wave electromagnetic simulation. By properly constructing metasurface, broadband absorption over 70% fraction bandwidth has achieved, showing that can provide a wideband in...
In this work, the relative dielectric permittivity of graphene oxide (GO), both its real and imaginary parts, have been measured under various humidity conditions at GHz. It is demonstrated that increases with increasing due to water uptake. This finding very different a couple MHz or lower frequency, where decreasing humidity. GO electrical property was used create battery-free wireless radio-frequency identification (RFID) sensor by coating printed antenna layer. The resonance frequency as...
This paper proposes a new type of graphene based tunable radar absorbing screen. The screen consists Hilbert curve metal strip array and chemical vapour deposition (CVD) sheet. is not only when the potential changes, but also has broadband effective absorption. absorption bandwidth from 8.9GHz to 18.1GHz, ie., relative more than 68%, at 0eV, which significantly wider that if sheet had been employed. As varies 0 0.4eV, central frequency can be tuned 13.5GHz 19.0GHz. In proposed structure, was...
Graphene RF Q1and microwave passive components such as coplanar waveguide transmission lines, open/short-circuited resonators and wideband antenna on paper substrate were designed, screen printed characterized in this work.The experimental results demonstrate that the graphene can be used for signal transmitting, processing radiating/ receiving; revealing ink a low cost alternative to much more expensive metal nanoparticle inks, silver ink.The is processed at temperature so it compatible...
As a potential risk to human and environmental health, radio frequency (RF) radiation should be studied due the higher frequencies larger bandwidths that may employed. Electromagnetic interference (EMI) shielding materials can prevent exposure RF radiation, but most of them are visibly opaque. In this work, we propose fabricate transparent EMI using an ultrathin silver layer sandwiched by oxides (SLSO) as building blocks. The samples with double-sided SLSO (D-SLSO) structure exhibit highest...
In this article, a wideband energy selective surface (ESS) with quasi-elliptic response and high shielding effectiveness is proposed for providing out-of-band rejection high-power microwave protection at the same time systems. By cascading three layers of structures loading diodes, nonlinear transmission property are realized. The ESS has wide pass-band simultaneously turned <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">off</small> diodes under...
Abstract In this work, we have designed, fabricated and experimentally characterized a printed graphene nano-flakes enabled flexible conformable wideband radar absorber. The absorber covers both X (8–12 GHz) Ku (12–18 bands is on substrate using conductive ink through stencil printing method. measured results show that an effective absorption (above 90%) bandwidth spans from 10.4 GHz to 19.7 GHz, namely 62% fraction bandwidth, with only 2 mm thickness. flexibility of the enables conformably...
Metal mesh films have been shown to be a promising strategy effectively mitigate the growing issue of electromagnetic interference (EMI) in optoelectronic systems. To achieve superior shielding effectiveness, it is common increase thickness film. However, mesh-based materials frequency-dependent effectiveness that decreases as frequency increases. Simply increasing cannot enhance EMI at high frequencies. This will further lead challenges such increased processing difficulties and higher...
Abstract While functional materials with both light transmitting and electromagnetic shielding are highly desirable have made rapid advancements, only very few of them meet the stringent interference (EMI) criteria for optoelectronic systems. Achieving high optical transparency superior EMI in a broad frequency spectrum is remaining challenge academic industrial areas. Herein, design strategy shorted micro‐waveguides (SMWs) array to decouple transmission proposed experimentally demonstrated....
Endovascular treatment (EVT) for vertebrobasilar artery occlusion (VBAO) with atrial fibrillation presents complex clinical challenges. This comprehensive multicenter study of 525 patients across 15 Chinese provinces investigated nuanced predictors beyond conventional metrics. While 45.1% achieved favorable outcomes at 90 days, our advanced machine learning approach unveiled subtle interaction effects among variables not captured by traditional statistical methods. The predictive model...
The international normalized ratio (INR) is a biomarker of coagulopathy. objective this study was to assess the relationship between INR and clinical outcomes in patients with large vessel occlusion (LVO) stroke who received endovascular therapy. RESCUE BT trial multicenter, randomized, double-blind, placebo-controlled involving 948 from 55 centers across China. We extracted data related database, outcome measures comprising intracranial hemorrhage (ICH) 90-day mortality. Logistic regression...
The safety and efficacy of treatment with intravenous tenecteplase before endovascular thrombectomy in patients acute ischemic stroke due to large-vessel occlusion remain uncertain. In this open-label trial conducted China, we randomly assigned who had presented within 4.5 hours after onset were eligible for thrombolysis receive either followed by or alone. primary outcome was functional independence (a score 0 2 on the modified Rankin scale; range, 6, higher scores indicating more severe...
In this letter, a flexible and frequency-reconfigurable bandstop frequency selective surface (FSS) is studied theoretically experimentally. The FSS patterns are fabricated on an ultrathin substrate through screen printing, low-cost, high-efficiency additive manufacturing methodology. With the embedded varactors biased from 0 to 20 V, resonant tuning 3.5 5.7 GHz was measured. Outstanding wide angular stability under different bias voltages has also been examined in theory measurement by...
The concept of a novel three-dimensional (3-D) frequency selective structure is put forward, which different from conventional two-dimensional (2-D) surface (FSS) design. Relationships between geometry dimensions and response are investigated with simulations. results indicate that the characterized multiple resonances broad relative bandwidth. Meanwhile, it leads to superior shielding effect electromagnetic pulse (EMP). This will encourage some more research in 3-D structure.
Spoof surface plasmon polariton (SSPP) features highly confined field confinement and subwavelength operational scale. However, at the low-frequency region, SSPP usually suffers from a poorly field, relatively large loss resulted mode conversion. Folded substrate integrated waveguide (FSIW) is compact version of waveguide. FSIW guided wavelength hence not preferred for antennas. In this letter, we propose combination SSPP, which has benefits both SSPP. Compared with pure FSIW-SSPP...
In this brief, we propose a novel wide-bandpass substrate integrated waveguide (SIW) filter in compact circular cavity. It is implemented by etching spoof localized surface plasmon (SLSP) structure for more modes excitation. The dominant mode of SIW cavity and the seven SLSP are employed to realize octuple-mode wideband filtering feature. Moreover, two edges passband can be adjusted independently changing parameters or SLSP. Compared traditional filters, proposed dramatically increases...
In this communication, a novel wideband fixed-beam leaky-wave antenna (LWA) is proposed. The designed based on air-filled substrate integrated waveguide (SIW), which composed of one layer printed circuit board (PCB) in the middle and two layers thin copper plates top bottom. different are aligned fixed by screws. A long slot etched surface SIW as radiator. Due to dispersive characteristic SIW, can radiate at direction over wideband. To best our knowledge, first time that adopted for LWA...
A high-efficiency reconfigurable element for dynamic metasurface antennas (DMA), consisting of a complimentary electric-LC (CELC) resonator fed through the cavity from waveguide slot, is proposed in this paper, with positive- intrinsic-negative (PIN) diodes loaded to realize coding performance. To begin with, low efficiency problem traditional CELC demonstrated before introduction element. Subsequently, an equivalent circuit illustrated analyse resonant performance, extensive parametric...
The potential of highly flexible and conductive graphene laminate is extended to the application electromagnetic interference shielding. Graphene nanoflake-based ink printed on paper, compressed form a with conductivity 0.43 × 105 S/m. shielding effectiveness experimentally measured be above 32 dB between 12 18 GHz, even though thickness only 7.7 µm. It demonstrated that has great in offering lightweight, low-cost, environmentally-friendly materials.