A single-layer miniaturized reflectarray element with low sensitivity to mutual coupling effects of surrounding elements is\npresented in this paper. The configuration is proposed to preserve the effectiveness of the infinite array approach in those\napplications requiring reflectarrays with very small interelement spacing. The inherent ability of the proposed geometry to be\nadopted in highly miniaturized cells is demonstrated through an extensive analysis of mutual coupling effects on reflectarray\nphase design curves. In order to prove the independence of the proposed cell to mutual coupling effect, the phase curve\nvariations due to the presence of different surrounding elements with respect to the case of identical cells are evaluated using the\nwell-known extended local periodicity method. Small and negligible mutual coupling errors are retrieved for the proposed\nminiaturized unit cell, thus demonstrating lower sensitivity to mutual coupling adverse effects.
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