Pattern recovering of conformal antenna array for strongly deformed surfaces

Pattern recovering of conformai phased array on changing surfaces is receiving an increasing attention in the last years. This paper presents the pattern recovery of a strongly deformed conformal phased-array using the projection method. A 4 × 4 flat array is placed on a doubly curved surface. The phase compensation technique is applied first on rows, and then, considering rows as single antenna elements, on array columns. This technique demonstrates to be effective in recovering direction and width at half maximum of the pattern main lobe and in suppressing side lobes. Analytically predicted recovered patterns are confirmed through full-wave numerical simulations.