We present the automated design of a broadside-radiating, linearly-polarized metasurface antenna. The design is carried out with a numerical optimization procedure based on the equivalent surface current only. A non-linear conjugate gradient algorithm is applied to minimize an objective function that includes both realizability and far field requirements. A suitable configuration of circular unit cells, chosen from a database of precomputed shapes, is then used to implement the antenna. The proposed antenna has a diameter <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">≈ 12λ</tex> , working at a frequency of 23 GHz. The obtained design has been validated with commercial software simulations, then prototyped and tested.
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Zucchi et al. (2024) studied this question.
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