نتایج جستجو برای: dipole antenna
تعداد نتایج: 65961 فیلتر نتایج به سال:
We have studied the effective response of composites of spherical particles each having a dielectric profile which varies along the radius of the particles. We developed a first-principles approach to compute the dipole moment of the individual spherical particle and hence the effective dielectric response of a dilute suspension. The approach has been applied to two model dielectric profiles, f...
This paper presents a new compact end-fire antenna for ultra-high frequency (UHF) radio frequency identification (RFID) applications. The antenna has two meandered dipole drivers. A folded reflector and a rectangular reflector are demonstrated. The advantage of the end-fire antenna with meander dipole drivers compared to the conventional quasi-Yagi antenna is a reduction in the length of the dr...
This study investigates the performance of a dipole antenna above electromagnetic band gap (EBG) substrates with different number of patches to realize a low specific absorption rate (SAR) antenna for a 4G wireless communications system (3.5 GHz band). A cubic head model is used for the initial analysis to estimate the radiation characteristics and the SAR of the antenna. Computational results ...
چکیده ندارد.
EpiGauss is a method that combines single dipole model with dipole clustering to characterize active brain generators in space and time related to EEG events. EpiGauss was applied to study epileptogenic activity in 4 patients suffering of hypothalamic hamartoma related epilepsy, a rare syndrome with a unique epileptogenic source – the hamartoma lesion – and natural propagation hypothesis – from...
This paper present the analysis and design a small size, low profile and multiband fractal cross dipole antenna. The proposed antenna design, analysis and characterization had been performed using the method of moments (MoM) technique. The new designed antenna has operating frequencies of 0.543 GHz, 2 GHz, and 6.5 GHz with acceptable bandwidth which has useful applications in communication syst...
The high spin structure of 108Ag nucleus has been studied using the reaction 11B + 100Mo at 39 MeV with Indian National Gamma Array (INGA) at TIFR-BARC accelerator facility. From the twoand higher-fold coincidence analysis of the emitted γ-rays, the level structure of the nucleus is built, with addition of around ∼ 60 new transitions. A new positive parity dipole band has been observed and sign...
The properties and stabilities of various wave types are investigated in nonlinear lattices with a ‘Hertz’ type potential. In particular the interaction of intrinsic localized modes with other waves is studied. Evidence is provided that Fano-like resonances, observed in other nonlinear systems, cannot occur in Hertzian lattices.
The nonlinear optical properties of new tetrathiafulvalenes and 1,3-dithioles have been studied using first principle methods. The higher hyperpolarizabilities of the extended 1,3-dithioles compared to Tetrathiafulvalene analogs are explained on the basis of the less localized HOMO of the former giving rise to higher transition dipole moments and a more pronounced decrease of the HOMO-LUMO gap ...
We present the numerical parametric study of a reconfigurable plasma antenna array (PAA) composed of a metallic half-wavelength dipole and a set of cylindrical plasma discharges arranged in a planar square lattice. Our results, obtained with the linear embedding via Green’s operators (LEGO) method, indicate that beam-forming and beam-steering functionality can be achieved and controlled by appr...
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