A5101849993- Advanced Antenna and Metasurface Technologies
- Metamaterials and Metasurfaces Applications
- Antenna Design and Analysis
- Advanced MIMO Systems Optimization
- Energy Harvesting in Wireless Networks
- Cooperative Communication and Network Coding
- Fusion materials and technologies
- Optical Wireless Communication Technologies
- Full-Duplex Wireless Communications
- Nuclear Materials and Properties
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Wireless Communication Technologies
- Indoor and Outdoor Localization Technologies
- Wireless Networks and Protocols
- Ion-surface interactions and analysis
- Luminescence and Fluorescent Materials
- Speech and Audio Processing
- Wireless Signal Modulation Classification
- Photoacoustic and Ultrasonic Imaging
- Mobile Ad Hoc Networks
- Integrated Circuits and Semiconductor Failure Analysis
- Radar Systems and Signal Processing
- Wireless Communication Networks Research
- Distributed Sensor Networks and Detection Algorithms
- Satellite Communication Systems
Xijing University
2019-2024
Tianjin University
2013-2024
Zhejiang Sci-Tech University
2024
Tsinghua University
2012-2023
Anhui University
2023
Xi'an Institute of Optics and Precision Mechanics
2023
University Town of Shenzhen
2023
Chongqing Institute of Green and Intelligent Technology
2023
Energy Research Institute
2022
Peking University
2016-2021
Surface-enhanced Raman spectroscopy (SERS), with high sensitivity to a broad range of molecules, can detect molecular "fingerprints" in complex substance and thereby offers promising solution for noninvasive medical diagnostics personal healthcare monitoring. The eventual realization such applications relies on SERS substrates dense uniform hot spots, good chemical stability, mechanical durability. With these criteria mind, we developed flexible nanoporous substrate via the situ synthesis...
3D structures with characteristic lengths ranging from nanometer to micrometer scale often exhibit extraordinary optical properties, and have been becoming an extensively explored field for building new generation nanophotonic devices. Albeit a few methods developed fabricating structures, constructing accuracy, diversified materials, perfect morphology is extremely challenging task. This study presents general nanofabrication technique, the focused ion beam stress induced deformation...
We introduce an electromechanically tunable metasurface composed of array three-dimensional nanosplit-rings for reversible and large-range changes optical characteristics in infrared (IR) regime. When a current is induced or withdrawn, each nanosplit ring the surface can deform multi directions consequently become closed (OFF) open (ON) state. Theoretical experimental results manifest that, as dynamically manipulated between ON OFF states, corresponding resonance absorption will reversibly...
In the communication, a monopolarized and dual-polarized polarization-rotating frequency-selective surfaces (PR-FSSs) are designed successively. The two PR-FSSs both three-layer aperture-coupled-patch periodic structure. When they interpreted as an array of antenna-filter-antenna (AFA) modules, because polarization directions upper lower antennas in each AFA module orthogonal to other, can realize rotation frequency selection at same time. PR-FSS is first, its relative bandwidth reaches up...
A non-line-of-sight (NLOS) ultraviolet (UV) communication channel model is established by using a Monte Carlo simulation method based on photon tracing. This considers the multiple-scattering effects of UV signal propagation in atmosphere, and simulates condition dual receivers for diversity reception. The characteristics are obtained simulating arrival probabilities. employed to study NLOS scattering channels variety conditions, including separation distance between transmitter receiver,...
Energy harvesting techniques are promising in next generation wireless communication systems. However, most of the existing works based on an ideal linear energy model. In this paper, a multiple-input single-output cognitive radio network is studied under practical non-linear order to improve security both primary and secondary network, cooperative jamming scheme proposed. A robust artificial noise aided beamforming design problem formulated bounded channel state information error The...
In this study, a coding diffusion metasurface (CDMS) based on circular-polarization (CP)-maintaining is proposed for radar cross-section (RCS) reduction. The CP-maintaining can achieve ultra-wideband reflection, and its main reflection phase under CP incidence be adjusted at will by the Pancharatnam-Berry generated rotation of unit cell, so it used to design CDMS. Thus, metasurface, 2-bit CDMS proposed. simulated measured results demonstrate that highly effective RCS reduction arbitrarily...
An absorptive coding metasurface (ACM) is proposed to achieve radar cross section (RCS) reduction in this paper. In the design progress of ACM, two different lossy elements are at first, which can both be regarded as a composite composed two-layer resistive frequency selective surface (RFSS) and polarization conversion (PCM). The RFSS has certain wave-absorbing property due ohmic loss. addition, PCM ultra-wideband linear conversion, polarization-converted reflected waves under same incidence...
In this paper, to achieve circular-to-linear polarization conversion, a novel converter based on an anisotropic metasurface is proposed. Because the orthotropic structure with pair of mutually perpendicular symmetric axes u and v, theoretical analysis shows that can conversion if its reflection phase difference Δφuv under u-polarized v-polarized incidences close ±90°. Numerical simulations show very +90° in two separated frequency ranges, so high-efficiency dual-band CP-to-LP it convert...
In this work, a circular polarized (CP) maintaining metasurface is proposed, which can realize ultra-wideband CP-maintaining reflection and make its co-polarization coefficient under CP incidence close to 1.0 in the frequency band 6.2-26.4GHz; addition, by rotating unit cell structure, Pancharatnam-Berry (PB) phase be generated co-polarized incidence. Thus based on metasurface, 2-bit PB coding further proposed for Radar Cross Section (RCS) reduction. The simulated results show that has...
Diffusion Transformer (DiT) has emerged as the new trend of generative diffusion models on image generation. In view extremely slow convergence in typical DiT, recent breakthroughs have been driven by mask strategy that significantly improves training efficiency DiT with additional intra-image contextual learning. Despite this progress, still suffers from two inherent limitations: (a) training-inference discrepancy and (b) fuzzy relations between reconstruction & process, resulting...
A measurement method of glucose concentration based on fiber-optic surface plasmon resonance (FO-SPR) is proposed to achieve online, real-time detection human blood concentration. The end-reflection structure FO-SPR sensor was simulated and the impact different parameters performance analyzed. Then manufactured according optimized parameters. system with SPR set up. Glucose solutions concentrations were measured experiment results showed that correlation coefficient fitting curve between...
Abstract Cognitive radio network with multiple-input multiple-output is an effective method to improve not only spectrum efficiency, but also energy efficiency. In this article, a linear precoding matrix optimization algorithm, named gradient-aided mutual information (GAMIO), designed maximize the secondary users’ Unlike previous algorithms which were developed under specific input assumption, GAMIO algorithm can work without imposing any assumption. Furthermore, framework proposed develop...
Non-orthogonal multiple access (NOMA) with the effective successive interference cancellation (SIC) is proved as a promising solution to improve spectrum efficiency (SE). However, since SIC usually requires complex algorithm and leads higher processing delay, it may not be accepted by B5G wireless communication due limited hardware resource of mobile terminal strict real-time request service. Therefore, whether NOMA simple receiver could keep performance advantage directly relate promotion...
In this paper, an ultra-wideband circular polarization (CP) maintaining reflector is proposed based on anisotropic metasurface, which orthogonal structure with a pair of symmetrical axes u and v perpendicular to each other. The simulated results show that the can realized CP-maintaining reflection under both right-handed left-handed CP (RHCP LHCP) incidences in frequency band between 8.79 27.09 GHz, fractional bandwidth up 102%. addition, physical mechanism has been analyzed detail, one...