A5006364500- Antenna Design and Analysis
- Metamaterials and Metasurfaces Applications
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Optimization
- Microwave Imaging and Scattering Analysis
- Energy Harvesting in Wireless Networks
- Indoor and Outdoor Localization Technologies
- Wireless Power Transfer Systems
- Advanced Fiber Optic Sensors
- Photoacoustic and Ultrasonic Imaging
- Photonic and Optical Devices
- Millimeter-Wave Propagation and Modeling
- Advanced MEMS and NEMS Technologies
- Photonic Crystals and Applications
Xidian University
2017-2022
A novel amplifier-based transmissive space-time-coding metasurface is presented to realize strongly nonlinear controls of electromagnetic (EM) waves in both space and frequency domains, which can manipulate the propagation directions adjust enhancements harmonic break Lorenz reciprocity due nonreciprocity unilateral power amplifiers. By cascading amplifier between patches placed on two sides metasurface, transmit spatial EM forward direction while blocking it backward direction. Two status...
In this paper, a comprehensive study of millimeterwave (mmW) imaging for far-field and near-field objects using 1-bit programmable metasurface (PMS) is presented. Theoretical PMS simulation models are proposed by plane-wave angular spectrum approach, in which two based on the flexible mmW beam-forming developed. The first model steers high-gain beams electronically to scan over region interest, suitable object detection surveillance. second model, randomly complex generated that can sample...
A 1-bit digital reconfigurable reflective metasurface (RRM) with 20 × cells is presented, fabricated and measured for beam-scanning performance in this paper. The cell designed a single layer structure one varactor diode, controlled electronically. cell’s phase compensation over 180° between 3 GHz 4 the two states difference are selected as coding “0” “1”. By fuzzy quantification theory, all elements on RRM set to be or “1” according calculated by MATLAB. Furthermore, changing of RRM, it can...
A broadband two-layer transparent metamaterial unit is proposed as a absorber at X-band, Ku-band and K-band. The soda-lime glass indium tin oxide (ITO) film were used to design the unit. In case of both TE-polarization TM-polarization, high absorption, more than 90%, shown in frequency range 8.1GHz 28.7GHz. thickness 3.3mm. has wide incident angle stability transparency. It can be widely all kinds household appliances order reduce electromagnetic radiation because structure visible light band.
This article presents a holographic metasurface antenna with stochastically distributed surface impedance, which produces randomly frequency-diverse radiation patterns. Low mutual coherence electric field patterns generated by the can cover K-band from 18 to 26 GHz 0.1 intervals. By utilizing (FDHM) antenna, we build near-field microwave computational imaging system based on reflected signals in frequency domain. A standard horn is adopted acquire domain radiated proposed FDHM antenna....
A metamaterial aperture antenna (MAA) that generates frequency-diverse radiation field patterns has been introduced in the context of microwave wave imaging to perform compressive image reconstruction. This paper presents a new metamateriapl design, which includes two kinds elements with random distribution. One is high-Q resonant element whose frequency agile, and other one low-Q high efficiency across band. Numerical simulations measurements show up 60% can be achieved for MAA far-field...
In this paper, a dual-band and dual-polarized element is proposed to design reconfigurable reflectarray antenna (RRA) realize the frequency beam-scanning characteristics, which aimed at working in two polarization modes different frequency. The consists of split-rings variodes. can achieve agility characteristic between 4.2GHz 6.5GHz mode. Furthermore, phase shift range more than 300° when unit works both by changing capacitance value Therefore, cell good choice plannar with fast electric...
A novel multi-layer metasurface absorber (MA) unit, which is optically transparent, broadband, wide-angle and polarization-insensitive, designed optimized for microwave antireflection based on the indium tin oxide (ITO) film. Theoretical simulation results show that proposed unit exhibits a high absorption response more than 90% from 5.4 GHz to 36.7 relative bandwidth about 148.7%. In addition, keeps good polarization insensitiveness wide-incident-angle stability characteristics with...
In this paper, a high Q factor metamaterial aperture element is proposed for compressed sensing imaging with simple structure and well portability in different band. Firstly, novel CELC cell to improve the factor. Then, Complementary Electric-LC (HQCELC) created much higher factor, efficiency frequency agility Characteristics. After that, at Ka band built apply image reconstruction experiment MATLAB validate HQCELC reasonable or not. By results of imaging, correctness feasibility have been...
We present a dual-bit programmable deep sub- wavelength meta-atom based on vanadium dioxide (VO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> ). With different intensities of the laser irradiation, VO appears material properties. Its conductivity can be set to 10 S/m, 100000 and 5000 S/m for insulator, metal, or weak excitation state, respectively. When is insulator meta- atom seen as 1-bit phase coding at 0.12THz 180° ± 20° band...