A5101997770- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Microwave Engineering and Waveguides
- Electromagnetic wave absorption materials
- Metamaterials and Metasurfaces Applications
- Electromagnetic Scattering and Analysis
- Photonic and Optical Devices
- Radio Wave Propagation Studies
- Ultra-Wideband Communications Technology
- Acoustic Wave Phenomena Research
- Electromagnetic Simulation and Numerical Methods
- Analog and Mixed-Signal Circuit Design
- Plasmonic and Surface Plasmon Research
- Vehicle Noise and Vibration Control
- Flame retardant materials and properties
- Millimeter-Wave Propagation and Modeling
- Optical Coatings and Gratings
- Advanced Fiber Laser Technologies
- Aerodynamics and Acoustics in Jet Flows
- ZnO doping and properties
- Magnetic Bearings and Levitation Dynamics
- Inertial Sensor and Navigation
- Magnetic Properties and Synthesis of Ferrites
- Antenna Design and Optimization
- Nanopore and Nanochannel Transport Studies
Xi'an University of Technology
2015-2024
Southeast University
2024
Fudan University
2019-2023
University of Chinese Academy of Sciences
2021-2023
Technical Institute of Physics and Chemistry
2021-2023
Chinese Academy of Sciences
2019-2023
Nanjing Forestry University
2023
Lanzhou University of Technology
2022
Harbin University of Science and Technology
2021-2022
Shandong University
2021
Graphene nanosheets and carbonyl iron-nickel alloy powder were used in a synergistic manner to fabricate cyanate ester nanocomposite with an excellent EMI shielding effectiveness high thermal conductivity.
In this letter, an ultrawideband (UWB) multiple-input-multiple-output (MIMO) antenna using a novel fence-type decoupling structure, which has high isolation in the UWB, is presented. The MIMO design consists of two half-cutting UWB units that have good low-frequency impedance-matching performance because use rectangular slot on radiation patch. Meanwhile, operating band enhanced by introducing structure at ground antenna. Furthermore, L-shaped parasitic branches are designed to heighten...
In this study, two compact ultra‐wideband (UWB) frequency selective surface (FSS) reflectors, which combine the branch loading method with design of traditional FSS, are proposed for antenna gain enhancement application. The working mechanism FSS reflectors is analysed by equivalent circuit model. first reflector, a 10 × array 8.25 mm unit size, not only enhances UWB antenna, but also guarantees constant 0.5 dB variation across whole operation band. To further reduce reflector more 6.25 size...
Silicon carbide (SiC) has attracted widespread attention as an absorber material due to its excellent high-temperature stability and corrosion resistance. However, issues such low absorption strength narrow bandwidth still need be addressed. In response these challenges, a core–shell structure of barium ferrite nanoparticles deposited on the surface SiC was prepared by hydrothermal method annealing process in this study, microwave performance effectively improved multicomponent...
Novel closed-form expressions for effective material properties of honeycomb radar-absorbing structure (RAS) are proposed. These expressions, which derived from strong fluctuation theory with anisotropic correlation function, consist two parts: 1) the initial value part and 2) dispersion characteristic part. Compared classical formulas, novel provide a better formulation electromagnetic parameters RAS, characterized by well-behaved increase in wide frequency band. The good agreement between...
In this study, Loran-C signals were collected throughout the day, and characteristics of received at different propagation distances analyzed. Because signal amplitude is small difficult to recognize a long distance there mutual interference between stations, linear average method used process signal. At locations closer receiver, clear observations time delay variation in one-hop sky wave can be made by using ground as reference, which applied studying parameter inversion lower ionosphere....
In this work, we propose novel layer-structured polymer composites (PCs) for manipulating the electromagnetic (EM) wave transport, which holds unique interference (EMI) shielding features. The as-prepared PCs with a multilayered structure exhibits significant improvement in overall EMI effectiveness (EMI SE) by adjusting contents and distribution of electrical magnetic loss fillers. low nanofiller content (5 wt % graphene nanosheets (GNSs) 15 Fe₃O₄) thickness only 2 mm exhibited ultrahigh...
A stochastic finite-difference time domain (S-FDTD) combined with the piecewise linear recursive convolution method is applied to model wave propagation in unmagnetized plasma random frequency. The stretched-coordinate perfectly matched layer implementation of S-FDTD also presented. accuracy and efficiency proposed algorithm are validated by numerical examples.
A small ultrawideband (UWB) slot antenna is proposed using a stepped impedance resonator feeding line, aiming at improving band-edge selectivity. The mainly comprises line with low-pass characteristics the top of dielectric substrate and two slots bottom. used to improve upper selectivity, narrow near improves lower frequency selection range, selective characteristic, reflected zeros are analyzed studied. measured results show that covers range UWB systems from 3.1 11 GHz (114%) reflection...
An efficient synthesis route was developed for the preparation of multiwalled carbon nanotube (MWCNT) nanohybrids using azide-terminated poly(methyl methacrylate) (PMMA) via a combination reversible addition fragmentation chain transfer (RAFT) and click reaction. A novel azido-functionalized agent (DMP-N3) prepared subsequently employed to mediate RAFT polymerizations methyl methacrylate (MMA). The exhibited first-order kinetics linear molecular weight dependence with conversion. kinetic...
In this letter, we present a novel design method, which is based on the dispersive effective permittivity formula, to carry out coating thickness optimizations of grading honeycomb radar absorbing structure (RAS). First, calculation model for reflectivity RAS established by using closed-form expression and transmission line theory. Then, comparison between calculative results experimental data shows that computational error can be reduced about 75% with introduction formula. Finally,...
In this letter, a miniaturized spoof surface plasmon polaritons (SSPPs) low-pass filter with novel transition structure is proposed. The designed by two rectangular strips an inclination of 17° and right-angled triangle patches. we analyzed the normal azimuthal components electric field perpendicular to plane at different locations, verifying effectiveness transitional structure. Besides, efficient conversion between quasi-transverse electromagnetic (TEM) waves transverse magnetic (TM)...
Abstract A compact reconfigurable filtering ultra-wideband (UWB) antenna with switchable band-notched functions is proposed. The basic structure of the proposed design a slot good band-edge selectivity using stepped impedance resonator feeding line. reconfigurability achieved by two microstrip lines paralleling to line and PIN diodes. bias circuit are relatively simple not connected radiation structure, so they have little negative influence on characteristics antenna. Total four states...
Multineedle whisker radar absorbing material (RAM) is a new kind of stealth nanocomposite, whose property function microstructure. The availability appropriate simulation models taking account the microscopic structure such interesting composite important for its design and performance optimization. In this letter, novel model presented to carry out microstructure improving multineedle RAM. First, computational established according equivalent medium theory transmission line method. Then,...
A large amount of long-term measurements illustrate that the propagation delay low-frequency (LF) ground-wave exhibits complex temporal variation properties. In this letter, we present a modified integral equation (IE) method to be capable predicting delay. The introduces suitable time-varying conductivity and refractivity models characterize channel in terms two aspects ground atmosphere. Comparisons between experiment data along actual paths show good agreement. effect factors controlling...
The precision of the long-wave propagation time delay is key factor affecting accuracy land-based navigation timing systems. For complex long-distance path, a differential correction method delay, which combines integral equation with functional relationship model, was presented. theoretical value calculated by and model used to describe variation distance. In local area, user corrected establishing station monitor in real determine parameters. Experimental results show that has...