Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
To realize an online diagnosis system for accurate detection of internal defects in high voltage polymeric outdoor insulations, a novel patch antennas system which would detect the transmission signal level difference caused by internal defects of insulations is proposed. In this work, investigation by simulation is p…
A compact printed antenna working for WLAN and WiMAX applications is presented, which is composed of a T-shaped monopole and two novel symmetrical left-handed metamaterial (LHM) unit cells. The T-shaped monopole with a partial defected ground plane is designed for the middle WiMAX band as a feed antenna. The LHM unit…
The paper deals with the statistical verification of degradation of photovoltaic cells based on data from four photovoltaic power plants of different size and type of photovoltaic cells. The results of the course of statistical graphs, both multiplicative and cumulative, prove the truth of the theory of panel degradat…
This paper presents a graphene-loaded bandwidth tunable frequency-selective surface (TFSS) working in THz spectrum from 0.3THz to 0.9THz, the pass bandwidth has great changed when bias voltage varies on the graphene. When the added chemical potential is becoming larger, the insertion loss of TFSS is getting smaller, t…
In recent years Nanoscience and Nanotechnology has become forefront runner in the existing research areas. As nanotechnology is growing with new advancement, various nano structured materials are introduced which have promising size dependent properties those can be altered according to the user needs. These unique pr…
Quasi-conformal transformation optics theory has been proven to be able to arbitrarily regulate electromagnetic waves. Especially in the case of two-dimensional TE polarization, the non-magnetic media can be used to construct the transformation space, which avoid narrowband and high loss properties of magnetic metamat…
We present a novel subwavelength scatterer based on half wave plate principle, i.e., π phase retardation between two orthogonal polarizations. The scatterer has very small thickness around λ/20 and is capable to provide high transmission of cross-polarized circular polarized wave. The full phase control in the range o…
In this papper, a partially magnetized ferrite is combined with a varactor to simulate a magnetoelectrically tunable microwave filter. Significant improvements in the flexibility and tunability of filter design.
A novel broadband circular-polarized array antenna with ultra-wideband low radar cross section (RCS) is proposed. The array is made up of 2 × 2 identically circular-polarized sub-arrays in a chessboard configuration. Further, each sub-array consists of 2 × 2 tightly-coupled metasurface-based elements with linear polar…
In this paper, a wideband linear polarization converter based on metasurface is designed, which can efficiently convert linear polarization of electromagnetic wave to its orthogonal direction in wideband. The unit cell of the proposed polarization conversion metasurface (PCM) is composed of a dielectric substrate with…
The aim of this document is to highlight the high number of transformers used in the wind energy sector. Considering the particularities and requirements of wind energy and its locations, for the correct design of transformers manufactured for this sector it is necessary to take into account aspects related to environ…
A double-layers perfect metamaterial absorber (DLPMA) in the microwave frequencies is proposed to reduce the radar cross section (RCS) of the circularly polarized(CP) tilted beam antenna, and it exhibits a wider band by reducing the distance between the three absorption peaks. Absorbing characteristics are analyzed an…
Based on the regulation of the polarization state of electromagnetic(EM) wave by metamaterials, the application of polarization rotator in C-band is studied in this paper. Firstly, a double-layer 90° polarization rotator is proposed and analyzed. The top layer is a split-ring resonator, the bottom layer is a grating,…
The process parameters of particleboard mixed corn straw and wood residue were studied in this paper. The effects of the mixing ratio of raw material, glue content, hot pressing temperature, hot pressing pressure on modulus of rupture, modulus of elasticity, internal bond strength, 2h water absorption thickness swelli…
Metasurface is an artificial layered material with a thickness less than the wavelength. It can flexibly and effectively manipulate electromagnetic wave, such as polarization, amplitude, phase, and propagation mode. In this paper, we proposed an abnormal refraction THz metasurface consisting of the silicon cubic reson…
The composite right/left-handed (CRLH) coaxial line (CL) is applied to the broadband choke structure for monocone antenna. As the choke structure uses the electromagnetic band gap (EBG), leakage current can be suppressed in broadband. The characteristics of the proposed antenna are simulated. Simulated results show th…
In this study, the design of a transmission line (TL) resonator based composite right/left-handed (CRLH) leaky-wave antennas (LWAs) are presented. Our design utilizes bandpass filter synthesis technique to design matching sections for improving input impedance bandwidth. An LWA with a fractional bandwidth of 40% is de…
A Ku-band Luneburg lens antenna composed of gradient index metamaterials is presented made by 3D printing. The focusing condition of the lens, requiring a gradient refractive index, is achieved by using the Photonic crystal structure. A dielectric column diamond structure is chosen as the Photonic crystal unit cell si…
A electrical small antenna using a novel finger-connected interdigital capacitor (FC-IDC), based on composite right/left handed (CRLH) unit cell, is proposed in this paper. The proposed CRLH antenna consists of a thin rectangle substrate integrated waveguide (SIW) cavity with the etched interdigital slot on the top me…
In this paper, A Fabry-Perot (FP) cavity antenna based on coding metasurface is addressed to realize a four-point focused hologram. A three-layer partial reflection surface (PRS) unit is designed by fixing the reflective phase to generate plane wave and arranging the transmission phase combined with the weight Gerchbe…