This paper presents a simple and effective way to increase the scan range of phased array antennas by using a metasurface (MTS) curved dome. The technique is based on a phase-gradient passive MTS that deflects the incident rays coming from the array aperture, and on a predistortion of amplitude and phase applied to the original phased array. We assume, therefore, to have at disposal an array capable of electronic beam scanning over a limited angular range with control of amplitude and phase. Geometrical optics ray tracing is used for the design of the metadome and physical optics for the analysis. For the sake of simplicity, the idea is illustrated here for a 2-D scan case; however, the extension to full 3-D scanning appears to be straightforward.

Benini, A., Martini, E., Monni, S., Vigano, M.C., Silvestri, F., Gandini, E., et al. (2018). Phase-gradient meta-dome for increasing grating-lobe-free scan range in phased arrays. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 66(8), 3973-3982 [10.1109/TAP.2018.2835575].

Phase-gradient meta-dome for increasing grating-lobe-free scan range in phased arrays

Benini, Alice;Martini, Enrica;Maci, Stefano
2018-01-01

Abstract

This paper presents a simple and effective way to increase the scan range of phased array antennas by using a metasurface (MTS) curved dome. The technique is based on a phase-gradient passive MTS that deflects the incident rays coming from the array aperture, and on a predistortion of amplitude and phase applied to the original phased array. We assume, therefore, to have at disposal an array capable of electronic beam scanning over a limited angular range with control of amplitude and phase. Geometrical optics ray tracing is used for the design of the metadome and physical optics for the analysis. For the sake of simplicity, the idea is illustrated here for a 2-D scan case; however, the extension to full 3-D scanning appears to be straightforward.
2018
Benini, A., Martini, E., Monni, S., Vigano, M.C., Silvestri, F., Gandini, E., et al. (2018). Phase-gradient meta-dome for increasing grating-lobe-free scan range in phased arrays. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 66(8), 3973-3982 [10.1109/TAP.2018.2835575].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1071604