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In this article, a super compact enhanced-bandwidth (EB) rat-race coupler (RRC) is initially proposed based on the combined technology of fractal geometry and lumped-element composite right/left handed transmission line (CRLH TL). The close-form broadband derivation and a set of design guideline for fractal implementation are provided which should be a reference value for future design. Fractal perturbation...
The use of radio frequency techniques is increasing in various applications in biodetection as well diagnostic and therapeutic medicine. This work reports for radio frequency labelfree based systematic biodetection platform; which can be used to identify several types of viruses. The presented technique is able to identify the virus type with few minutes without the use of any biomarkers. A coaxial...
This study presents the numerical simulation of deep transcranial magnetic stimulation dTMS by considering the semi-Halo coil working with a circular coil, i.e., semi-Halo-circular assembly coil (sHCA coil). Three-dimensional distributions of the induced magnetic field and electric field in realistic head model were obtained by impedance method, and the results were compared with the normal Halo-circular...
The wireless power transmission is widely studied for many kinds of application, for example, power supplier for cell phone or power source of EV. The value of supplying power of those applications is regarded over mW. But it is impossible to transmit to longer distance under the index of regulation of electromagnetic field radiation. Sensor Network Node (The small wireless information terminal) for...
In this paper, a high-efficiency selective emitter based on tantalum nanostructrue is designed for Solar Thermophotovoltaic (STPV) applications. Our numerical simulation shows that the proposed emitter can provide a specified narrowband emission spectrum above the band-gap with optimal bandwidth, and its performance is robust and independent to emittion angles and polarizations. According to the detailed...
Nanoshells are one of versatile plasmonic nanostructures in biomedical applications due to highly tunable optical properties and near-field enhancement. By exciting the nanoshell-plane junction with a radially polarized (RP) focused excitation, we have obtained further near-field boosting and consequent highly sensitive surface enhanced Raman scattering (SERS) of a monolayer of malachite green isothiocyanate...
Variety applications such as laser displaying, entertainment industry, materials processing, defence and astronomy research require high-power lasers at specific wavelengths of visible spectrum range. Frequency conversion of high-power IR laser radiation in nonlinear-optical crystals is one of the most efficient ways to generate high-power visible radiation [1]. Creating artificial inverse polarized...
Photodynamic therapy (PDT) is a safe treatment technology to treat malignant brain tumor, using laser to irradiate diseased tissue in the brain to treat malignant brain tumor. This paper designs the implanted miniature spiral receiving device (MSRD) operating at 796 kHz that receives transmitting coil (TX) energy through the resonant coupling power transmission (RCPT) to charge the Micro-LED (ML)...
A new wireless power transfer system using a S-LLC resonant converter is proposed to improve the load robustness performance for magnetic coupling and load condition variation in this paper. This system gain is analyzed by using impedance modeling. On the basis, the insensitive ability of the S-LLC system is proved by theory analysis. Furthermore, the design procedure of the S-LLC resonant parameters...
In view of the near sea area, the formulae finite depth spectrum is given in the paper, the spectral model under different water depths is obtained, by using Kirchhoff approximation and the modified two-scale method, the scattering coefficient and the Doppler echo signal of near sea area are calculated, the agreement with measured data proved the correctness and validity of the near sea area scattering...
Polarimetric Targets Decomposition is to decompose polarimetric data into several components by different physical scattering mechanism. Traditional decomposition methods are model-based, whose basis matrix is fixed to typical physical scatterers, such as surface, double bounce, volume. However, those methods cannot distinguish the differences of two kinds of surface scattering, or two kinds of double...
A wireless power transfer system with three coils has some characters different from two-coil WPTs. In this paper, a two-coil/three-coil hybrid WPT system is proposed to obtain better performances. The hybrid system is constructed through adding the third coil to the frame of the sending coil of the traditional two-coil WPT system. The dimension of the additional coil is smaller than the original...
This paper presents a novel design of a tunable tri-band bandpass filter using varactor-tuned stub-loaded resonators. The first and the third passband center frequencies of the proposed tri-band filter can be independently tuned by controlling the different values of the capacitances and different varactor diodes, whereas the second passband center frequency is fixed. A prototype tri-band filter is...
In the light of shortcoming of the existing reverse analysis method, including inaccurate semantic understanding of communication information and weak automation degree, etc. In this paper we propose a seeking-common and testing reverse analysis method based on set theory and achieve the extraction of industrial control system PLC remote operation instructions by building experiment platform. It is...
In this work, antennas utilized for an intra-vehicle 3–11 GHz and 55–65 GHz channel measurement are described. A measurement antenna should not only provide a wide-band impedance bandwidth but also have a stable radiation pattern and a high fidelity factor. For the lower frequency band, a metal conical monopole antenna is proposed for its frequency stable H-plane omnidirectional radiation pattern...
In this letter, an optimal power allocation scheme for energy efficiency (EE) maximization with low complexity in 5G downlink multiuser systems is presented. The optimal power allocation is obtained in two steps. The first step is to find the power scheme to maximize the geometric mean of weighted average channel gains corresponding to any fixed total dynamic power. The second step to obtain the optimal...
This paper achieves the parallel algorithm of fast multipole expansion method for electric field integral equation which is aimed to solve the electromagnetic scattering problems of some large metallic structures. We give the example of a spherical scattering structure to show the result of radar cross section. At first, this paper offers the discrete parallel algorithm boundary electric field integral...
A space-time array difference magnetotelluric method is proposed in order to suppress the correlated noise and obtain reliable plane wave impedance data in strong interference region. First, we established a model of electromagnetic prospecting system with multi-input and multi-output. Both natural and man-made electromagnetic field is considered to incidence to earth simultaneously, constitute a...
In this paper, a flexible I shaped stacked novel ultra wideband (UWB) antenna with defected and reduced ground resonant at 1.26 GHz with an impedance bandwidth of 1.278 GHz (1.0596 GHz to 2.3374 GHz) has been proposed which can be suitably employed for satellite reconnaissance, amateur radio, future soil moisture and sea surface salinity mission applications. The material employed for substrate is...
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