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This paper introduces an adiabatic Floquet modes expansion to design modulated metasurface (MTS) antennas. In these antennas, a MTS implements periodically modulated impedance boundary conditions to transform a bounded surface wave into a radiative leaky wave. A Floquet Wave expansion locally matched to the impedance boundary conditions well describes fields and currents on the MTS. This expansion...
The suppression of undesired surface waves on a reference array antenna resorting to a low-cost wide-band EBG surface is investigated experimentally through measurements of embedded element radiation patterns. An EBG frame around the array aperture is used to reduce back and side radiation while narrow EBG strips are placed in-between columns or rows of antenna elements to mitigate blind spots. Measurement...
The EBG separator used here provides interesting features with respect to other solutions presented in literature. The fabricated prototype exhibits and EBG slightly shifted with respect the patch bandwidth and does not fully exploit the EBG potential. More samples will be shown during the presentation.
This paper shows that a holographic pattern arising from the interference between a plane wave and a cylindrical surface wave is the same as that obtained by locally applying the dispersion condition in the small perturbation regime to a locally tangent periodic strip grating. This result seems not to add more to the holographic process to design actual antennas; however, other equations suggests...
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