Materials Literature
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In this work, a wideband and high gain millimeter wave array antenna based on highly conductive graphene film is designed, fabricated and tested. The proposed antenna consists of 4×4 radiation patches and a Chebyshev feed network, which are made of highly conductive multilayer graphene film with light weight and low c…
The phenomenon of electromagnetic induced transparency (EIT) based on graphene in microwave band has seldom been studied due to its shortcomings in frequency modulation in this band. However, based on the excellent tunability of graphene, EIT with adjustable amplitude in microwave frequency band is still applicable. I…
Pancharatnam-Berry (PB) metasurfaces are capable of flexibly tailoring circularly polarized waves but still limited to the phase-only control. Here, we present a new strategy for realizing simultaneous amplitude and phase control of circularly polarized waves by combining propagation phase and the PB counterpart. As a…
Pressed steel sheets, in this case compacted vehicle bodies represent the structure diversity of the non-homogeneous material. There is necessity to determine the shear strength for the development of the construction of new processing equipment (cutting) of steel sheets. To calculate the shear strength it is necessar…
Benefiting from the capability of providing a certain phase gradient on the interface between two media, metasurfaces have shown great promise for controlling the outgoing electromagnetic (EM) waves arbitrarily. In some applications, both phase and amplitude profiles are required simultaneously. Here, we propose a new…
A low profile wideband transmitarray for generating focusing orbital angular momentum (OAM) wave based on high order meta-frequency selective surface is proposed in this paper. The employed meta-FSS element with a fourth-order band-pass filter property, which exhibits the merit if low profile, high transmissivity and…
Metasurface has been widely utilized to control arbitrary wavefronts based on phase modulation. To achieve better performance, it is essential to design multi-band metasurface with frequency-dependent behaviors. In this work, a single-layer quad-band geometric meta-atom is proposed. By simply rotating the meta-atom, t…
Every machine in world needs to be ideal one but in actual practice none of exits. Efficiency is of prime concern for every machine specially in case of rotating machines. Induction motors have been the most significant role in the field of electric motor and machines. It has undergone tremendous development to increa…
This paper presents a frequency-selective rasorber with a transmission band between dual absorption bands based on thick-screen FSS. This rasorber consists of three layers: band-pass FSS, lower frequency absorption screen, and upper frequency absorption screen. The structure realizes a very low insertion loss in passb…
White copper material has strong corrosion resistance, more and more widely used in the warship's seawater pipeline system, however, the corrosion problem still cannot be ignored, because of the corrosive environment. Once the pipeline is corroded, the strength of that is decreased, then, under the action of internal…
We propose a novel reflective metasurface lens (or meta-lens) combining geometric phase and propagation phase to realize a multifunctional electromagnetic (EM) device. The proposed meta-lens can generate distinct focal spots of different polarizations under the linear polarized incidence. In order to verily the concep…
A novel artificial magnetic conductor (AMC) surface is designed for radar cross section (RCS) reduction in ultra-wide band. The proposed AMC structure is composed of two different double-layer AMC units, resulting in destructive reflection phase difference (180°±37°) in the band from 5.8 to 16.35 GHz (95.26%). Each AM…
A generalized process model of a microalgal biomass co-firing and an evaluation framework for feasibility assessment was developed. The process model allows for the representation of a diverse array of algal co-firing scenarios by the characterization the parameters at each step of algal cultivation and processing. As…
In HVDC transmission system, surface charges accumulate easily on the surface of insulating materials, which cause surface discharge and surface flashover. This phenomenon reduces the insulation performance of insulating materials and restricts the engineering application of HVDC transmission. The researches of surfac…
Electromagnetic (EM) metasurfaces have found many applications in perfect absorbers. Inhomogeneous-patterned EM metasurfaces not only ensure high beam collection efficiency, but also favor rectifying efficiency in microwave power collection. Theory of power collecting metasurface is discussed and applications of inhom…
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…