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The dispersion diagram of a 2D periodic structure built in stripline technology is determined by full-wave simulation. One of the geometrical parameter of the structure is then binary modulated in two orthogonal directions, yielding a new periodic structure with a unit cell that is four times larger with respect to the original one. The calculated dispersion diagram of the latter structure exhibits...
In this paper we investigate a multilayer frequency selective surface (FSS) for Ku and K-band applications. This three layer FSS consists of different shape metallizations in the different layers: namely circular patches in the top and bottom layers and of two square loop elements in the middle layer. Evaluation of this FSS with a radial patches and square loops show a significantly large pass bandwidth...
In this letter, we demonstrate the gain enhancement of an ultrawideband (UWB) antenna, achieved using an appropriately designed multioctave dual-layer frequency selective surface (FSS) reflector. The proposed novel FSS reflects effectively in phase over a bandwidth of about 120%. Hence, significant enhancement in antenna gain has been achieved with a low-profile configuration without compromising...
Numerical investigation of the effect on the dispersion diagram of a different number of off-axis positioned grounding vias for an elliptic patch in periodic arrangement is presented. Various aspect ratios for the mushroom-like structure in microstrip technology have been considered. The position of the vias has been moved according to the variation of the geometry, guaranteeing an easy scalability...
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