Exemplos de uso de Frequency selective em Inglês e suas traduções para o Português
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Sidechain filter- onboard frequency selective compression.
Frequency selective surfaces(fss) belong to a subclass of metamaterial consisting of two-dimensional metallic patches.
This work aims to design microwave absorbers using frequency selective surfaces.
Since only use the simple RLC frequency selective network, there will be a phenomenon of unclean noise removal.
The design of microwave antennas with application to broadband wireless networks,the design of frequency selective surfaces, and metamaterials.
In to study the behavior of frequency selective surfaces applied in antenna arrays, different layouts were proposed.
Recently, some research groups have studied the efficiency of frequency selective surfaces(fss) in this systems.
Reconfigurable frequency selective surfaces, rfss, have aroused the attention of several research groups for its numerous applications.
In this work,the different properties of frequency selective surfaces- fss are analyzed.
Frequency selective surfaces are increasingly common structures in telecommunication systems due to their geometric and electromagnetic advantages.
Numerical and experimental results are presented, providing the improvement of the performance of the antenna through the frequency selective surfaces appliance.
Exhibiting a filter property, the frequency selective surfaces, fss, has became theme of extensive research related with operating in multiple frequencies. .
This work studies the problem of detecting binary hypotheses in distributed systems with a fusion center operating in frequency selective channels.
One way of implementing a smart antenna uses frequency selective surfaces, which can reflect or transmit electromagnetic waves, depending on the frequency. .
The channel characterizations considers the presence of additive white gaussian noise(awgn),exponential path-loss and slow and frequency selective rayleigh fading.
As a matter of fact, the frequency selective surfaces with fractal geometry type would allow an even bigger reduction of the electrical length which provided greater flexibility in the design of these structures.
In particular, it presents a model, obtained through numerical simulation with ansyshfss andcurve fitting, for the dielectric effective permittivity of frequency selective surfaces fss.
This paper proposes the development of planar circuits,such as antennas, frequency selective surfaces(fss) and planar filters, using textile(cotton ticking, jeans and brim santista) as the dielectric substrate and the pure copper polyest.
A frequency selective surface is a periodic array of elements which consists of metallic patches or apertures, or even a combination of both, and displays the total reflection or transmission at the resonant frequency, thus behaving as a stop band or pass band filter.
A structure that has been received considerable attention is the fss(frequency selective surface), frequency selective surfaces, due the various applications in the frequency spectrum, including microwave and millimeter wave.
Precise machine monitoring through intelligent measuring andanalysis systems covering analytical evaluation of pre-processed values from the measurement device- as for example frequency analysis providing frequency selective observation results- and the calculation of further hydro specific characteristic values.
This works aims to attribute the use of frequency selective surfaces(fss) togheter with plannar antenna arrays, proposing new geometrys that grant better results than the older ones, in terms of directivity, gain and bandwidth.
Unlike of classical analysis model, the proposed analytical modeling, which is one of the main thesis contributions,uses a simple algorithm for approximate the response of frequency selective surfaces with arbitrary shape, for normal and oblique incidence and for substrates with all thicknesses.
This work aims to present the application of frequency selective surfaces(fss) in dual-band microstrip antenna to obtain the improvement of radiation parameters such as gain, directivity and front-to-back ratio.
The frequency selective surfaces have been the subject of research widely applied in the two last decades and are used in diverse applications ranging from microwave and antenna systems to applications in radomes and satellite communications.
That results give us the information to project two devices(the second and third)based on frequency selective surfaces(fss) on thz range and that are composed only by graphene elements and dielectric substrates without the insertions of different metals.
The literature defines basically the frequency selective surface as a periodic arrangement of patches that displays a certain frequency filtering and it may present characteristics of a band-stop or band-pass filter, which allows the reflection or the transmission of signals in a given frequency range.
In this context,one of the structures that has received considerable attention from several research groups is the frequency selective surface, fss, they can play a key role in optimizing telecommunications systems, allowing, among other applications, to reduce undesired signals and multiband operation.
Due to their appealing features for communication systems, frequency selective surfaces, fss, have been studied by many researchers, especially to be able to present operation on multiple frequencies and with reduced dimensions.
For different test objects anddifferent environmental conditions, the frequency selective amplifier can select different center frequencies(from tens of thousands of Hertz to hundreds of thousands of Hertz) to Get a large signal to noise ratio.