Fabry–Perot cavity antennas (FPCAs) are constituted by a grounded dielectric slab with a partially reflecting surface (PRS) on top, commonly implemented by an isotropic metallic thin sheet acting as a metasurface. These devices can be designed to radiate directive beams at broadside through a low-profile and compact structure at the expense of a typically narrowband behavior. The latter issue has recently been mitigated by placing a dielectric superstrate over the metasurface, generating a so-called thick PRS (see Fig. 1). This additional layer can suitably be designed to obtain a positive slope on the phase of the reflection coefficient, i.e., the thick PRS can show a non-Foster behavior. It is therefore possible to design the PRS in order to fulfill the cavity resonance condition to have a broadside beam over a relatively large frequency range.
Fabry–Perot cavity antennas based on thick partially reflecting sheets: innovative design criteria / Negri, E.; Ballarini, E.; Fuscaldo, W.; Burghignoli, P.; Galli, A.. - (2024), pp. 390-390. (Intervento presentato al convegno 2024 IEEE INC-USNC-URSI Radio Science Meeting (Joint with AP-S Symposium), INC-USNC-URSI 2024 tenutosi a Florence; Italy) [10.23919/INC-USNC-URSI61303.2024.10632449].
Fabry–Perot cavity antennas based on thick partially reflecting sheets: innovative design criteria
Negri E.;Ballarini E.;Burghignoli P.;Galli A.
2024
Abstract
Fabry–Perot cavity antennas (FPCAs) are constituted by a grounded dielectric slab with a partially reflecting surface (PRS) on top, commonly implemented by an isotropic metallic thin sheet acting as a metasurface. These devices can be designed to radiate directive beams at broadside through a low-profile and compact structure at the expense of a typically narrowband behavior. The latter issue has recently been mitigated by placing a dielectric superstrate over the metasurface, generating a so-called thick PRS (see Fig. 1). This additional layer can suitably be designed to obtain a positive slope on the phase of the reflection coefficient, i.e., the thick PRS can show a non-Foster behavior. It is therefore possible to design the PRS in order to fulfill the cavity resonance condition to have a broadside beam over a relatively large frequency range.File | Dimensione | Formato | |
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