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A tri-band frequency selective surface (FSS) is presented for Ku and Ka bands for space communications. The FSS is designed to be transparent in the frequency range 10.7 GHz–12.05 GHz and to provide total reflection at 20 GHz and 30 GHz, Ku- and Ka-band in satellite communications, respectively. A single square ring with two pairs of dipoles are used in each FSS unit cell to obtain this performance...
The design of a reflectarray for satellite applications is accomplished in this letter. The use of full-wave electromagnetic methods to compute the reflectarray elements in the design process has been replaced by the characterization of the reflectarray elements by artificial neural networks (ANNs). The antenna is designed to provide coverage in Ku-band to a European region defined by EuTELSAT. The...
In this paper, artificial neural networks (ANNs) for modelling reflectarray periodic element is evaluated. A reflectarray antenna based on a 3-layer stacked patch element is chosen. Every element in the reflectarray must shift the phase of the reflection coefficient a given amount to obtain the prescribed radiation diagram. Different shifts are obtained from different geometrical configuration of...
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