نتایج جستجو برای: directional stroke width
تعداد نتایج: 231070 فیلتر نتایج به سال:
Performance improves in terms of coverage in the MC-CDMA & CDMA network with the help of simulation model and an evaluation method for the smart antenna system is presented. The EC/Io coverage area is presented with the proposed method that can show the impact of smart antenna system on the function of antenna type and beam width. The performance improvements are remarkable in the smart antenna...
Soliton switching in a nonlinear directional coupler (NLDC) with Kerr nonlinearity and coupling constant dispersion (caused by intermodal dispersion between the symmetric and the anti-symmetric modes of the coupler) is studied using the well-known variational method. Switching characteristics are calculated and discussed. It is shown that the switching characteristics of the Kerr coupler for al...
A theory of smart loudspeaker arrays is described where a modified Fourier technique yields complex filter coefficients to determine the broadband radiation characteristics of a uniform array of micro drive units. Beam width and direction are individually programmable over a 180-degree arc, where multiple agile and steerable beams carrying dissimilar signals can be accommodated. A novel method ...
We present a system able to discriminate pulses according their duration with potential applications in all-optical signal multiplexing. The device is based on directional coupler nonlinear cores and metallic claddings dimensions nanometric scale. Simulations are carried out using the FDTD technique for ultrashort of femtosecond order. It shown that separate such respect time-width threshold wh...
Graphene can be transformed from a semimetal into a semiconductor if it is confined into nanoribbons narrower than 10 nm with controlled crystallographic orientation and well-defined armchair edges. However, the scalable synthesis of nanoribbons with this precision directly on insulating or semiconducting substrates has not been possible. Here we demonstrate the synthesis of graphene nanoribbon...
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