A5100734540- Advanced Antenna and Metasurface Technologies
- Electromagnetic Scattering and Analysis
- Metamaterials and Metasurfaces Applications
- Antenna Design and Analysis
- Electromagnetic Simulation and Numerical Methods
- Microwave Engineering and Waveguides
- Numerical methods in engineering
- 3D Printing in Biomedical Research
- Sensor Technology and Measurement Systems
- Soil Moisture and Remote Sensing
- Educational Technology and Assessment
- Geophysical Methods and Applications
- Orbital Angular Momentum in Optics
- Geomechanics and Mining Engineering
- Advanced Research in Systems and Signal Processing
- Advanced materials and composites
- Radio Wave Propagation Studies
- Cellular Mechanics and Interactions
- Antenna Design and Optimization
- RFID technology advancements
- Telecommunications and Broadcasting Technologies
- Near-Field Optical Microscopy
- Advanced Adaptive Filtering Techniques
- Laser and Thermal Forming Techniques
- Satellite Communication Systems
Beijing Institute of Technology
2014-2025
Shenzhen University
2025
Chinese PLA General Hospital
2021-2024
Technical Institute of Physics and Chemistry
2023
Chinese Academy of Sciences
2023
University of Science and Technology Beijing
2023
Nanchang Hangkong University
2014
Queen Mary University of London
2009-2010
Wan Fang Hospital
2002
A novel antenna design is proposed to enhance the gain and reduce radar cross section (RCS) of a patch by using metamaterial surface. polarization-dependent surface composed blocks slotted electromagnetic bandgap (EBG) structures are adopted in this letter. The layout pattern EBG elements designed antenna. Chessboard configuration further equipped for scattering cancellation. induced currents on studied, resulting mechanism enhancement EBGs clearly explained first time. This enables strategy...
Transformation electromagnetics provides a practical approach to control electromagnetic fields at will. Based on this principle, novel devices such as the invisible cloak have been proposed. Here we examine extension of technique applied design flat in antenna systems. A method using discrete coordinate transformation is proposed, which allows conversion conventional with curved shapes into systems, while preserving their non-dispersive, isotropic, broadband, and lossless properties. Two...
Integrated satellite and terrestrial networks (ISTN) are rapidly evolving to meet the ever-increasing demands of higher throughput, lower latency, wider coverage for future communications. Meanwhile, ultra-dense deployment low earth orbit (LEO) satellites has emerged as a promising architecture ISTN, which will enable seamless broadband while posing huge challenges wireless resource allocation. Artificial intelligence can be applied ISTN based on LEO constellations scenarios, endowing...
As strong optical absorption of DNA/RNA to Ultraviolet (UV) light, UV-Photoacoustic Microscopy (UV-PAM) can highlight the cell nuclei tissues at outstanding imaging contrast without introduction exogenous agents. However, a short Depth Focus (DOF) in traditional UV-PAM results out-of-focus artifacts when unprocessed tissue specimens that are usually characterized by uneven surface topology, which possibly degrades histopathological examinations. We propose wavefront engineering UV...
A low-profile metasurface (MS) with low scattering performance for both the x- and y-polarizations is designed based on far-field cancellation. Different from a conventional MS radar cross section that uses chessboard structures, this design makes use of 1-D MS. Without requiring periodicity in two dimensions, proposed can thus be integrated more flexibly many applications. Based MS, patch antenna array proposed. Full-wave simulations measurements show that, by incorporating reduced than 5...
A domain-decomposition-based preconditioner (DDP) is presented for the hybrid finite element-boundary integral-multilevel fast multipole algorithm (FE-BI-MLFMA). The formulation of FE-BI first approximated by element method (FEM) with absorbing boundary condition (ABC). Then this approximate FEM-ABC solved using tearing and interconnecting (FETI). Finally, an inner-outer iterative variable convergence threshold designed FE-BI-MLFMA. Because good numerical scalability FETI approximation...
Effective angiogenesis is essential for creating complex vascular networks in tissue engineering; however, there a scarcity of safe and potent pro-angiogenic factors. Although decellularized extracellular matrix (dECM) offers excellent biocompatibility widely used engineering as additive, its conventional extraction technique resulting significant loss bioactivity limits clinical potential. The dorsal dermal has rich blood perfusion dECM angiogenic In this study, the components from dermis...
An electromagnetic cloak based on a coordinate transformation approach is always inhomogeneous and anisotropic. In this paper, we investigate the sensitiveness of different cloaking schemes, when EM parameters are limited to range more plausible realize. Numerical experiments show that imperfect under moderate compression presents low anisotropy candidate scheme insusceptible changes in parameters. When devising using dispersive lossy metamaterials, unavoidable deviation material favors...
The wire medium consisting of an array parallel thin metallic wires was previously studied by using effective with spatial dispersion. In this paper, the validity conventional model examined analytically and numerically studying a canonical structure medium. It is noted that fails for high transversal harmonics, which consequently results in discrepancy scattering between physical structure. study, we propose new to include higher order dispersions: instead second-order expansion, proposed...
A novel approach based on the singularity cancellation (SC) is proposed to accurately and efficiently evaluate singular integrals arising in integral equation discontinuous Galerkin (IEDG) method. Since IEDG employs half-RWG basis function discretize 3-D equations, operation of using Green's identity convert strongly into weakly ones gives rise along with 4-D integrals. Thus, well-developed SC methods Duffy's transformation for traditional method cannot be directly applied IEDG. To solve...
An efficient numerical approach is presented for calculating backscattering from rough sea surfaces under low grazing incidence in this paper. The are modeled as random by using the impedance boundary condition. Different conventional integral equation, self-dual equation used to incorporate IBC surfaces. In order deal with large simulation domain brought angle, parallel multilevel fast multipole algorithm (MLFMA) employed speed up simulation. Numerical results of angle 2D surface illustrate...
Summary This paper incorporates the compensated Mitzner boundary conditions (CMBC) into hybrid finite element‐ integral‐multilevel fast multipole algorithm (FE‐BI‐MLFMA) for and accurate computation of scattering by three‐dimensional inhomogeneous objects with thin dielectric structures. In this CMBC‐FE‐BI‐MLFMA, each layer is reduced to an interface zero thickness; then CMBC applied establish relation electromagnetic fields across interfaces. approach can reduce amount remain advantages...
A novel low profile EBG is proposed to reduce the radar cross section (RCS) and enhance gain for patch antenna. The antenna shows scattering performance both x- y-polarization at boresight. Different with conventional RCS reflector designed by using chessboard-like structure, this design makes use of one-dimensional (1-D) periodic metasurface need fewer metamaterial cells. Full wave simulation results show that can be reduced more than 13dB 11.2GHz slotted EBG. Except reduction, broadside...
A novel and general method for a fast calculation of scattering/radiation fields is proposed by expressing the source-field relationship through moments (MoM). The scattering in observation region are expanded set SWGs defined on an auxiliary mesh. associated expansion coefficients obtained from matrix vector multiplication (MVM) impedance MoM equivalent currents. can enable accurate near-field without special treatment singularity. Numerical experiments targets with complex configurations...
A message passing interface (MPI) parallel scheme on distributed memory platforms is developed for the low-rank decomposition to accommodate requirement during angular sweeping of a rough surface in terms tapered wave incidence. Numerical examples, including that conducted 160 × square wavelength surface, are carried out demonstrate performance proposed MPI with respect accuracy, efficiency, scalability, and peak requirement.
This paper presents a patch antenna design with both high-gain and low-radar cross section (RCS) characteristic. A mushroom-like electromagnetic band gap (EBG) structure pair of symmetrical slots is applied to traditional antenna. It verified that, the currents on slotted EBG better induced in direction perpendicular slots. Slot-EBG cells arranged chessboard configuration are optimized satisfy phase cancellation criterion work as parasitical radiator. Simulation results indicate that...
Wideband satellite communication channel can be considered as nonlinear memory channel, which described by Volterra model. To counter both and effects, linear minimum mean square error (LMMSE) based turbo equalizer is proposed in this paper. Although LMMSE a kind of affine transform, the interference cancelled taking coefficients part into consideration. According to method, priori probability decision symbol not taken consideration part. Meanwhile, full information rather than extrinsic...
Automatic protection of EM detecting systems from unexpected high-power incidence is important to the robustness and life a passive system. In this paper, an adaptive metamaterial radome which automatically shields receiving antenna strong incident wave designed. Based on standard wire medium, PIN diodes are added between adjacent wires. When weak, in “off” state affect little transmission medium. enough turn “on” state, electric currents will be formed power transmitted largely reduced. The...