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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
RP in the case of an antenna array with 8 × 8 isotropic elements arranged in a triangular lattice in the event of (a) γ = 30°, and (b) γ = 60°. The red circle represents the visible region, whereas the black circle highlights the circular sector cell.