The design of a highly directive metamaterial‐based cavity antenna for a 2.46 GHz application is reported. The proposed structure is evolved from a Fabry‐Perot (FP) cavity with a patch antenna acting as the feed and four metallic walls on the lateral sides. One of the two reflectors is the antenna's ground plane and the other is made from a bilayered metamaterial‐based partially reflecting surface (PRS) constituted by a capacitive and an inductive grid. Calculations together with experimental results obtained from the fabricated prototype are presented. The results show a high directivity and low levels for the secondary lobes compared to a 2 × 2 patch antenna array.
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Burokur et al. (2009) studied this question.
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