This article presents a metasurfaced patch antenna in which the metasurface acts as a superstrate/cover placed atop a 2.45‐GHz patch antenna, at a small distance. The metasurface is a Mu‐near‐zero (MNZ) type, which gives a near‐zero index of refraction. The MNZ metasurface consists of 4 × 4 double‐closed‐loop resonators printed on a thin FR4 dielectric slab. The proposed antenna is low‐cost and low‐profile, having overall dimensions of 0.86 λ × 0.86 λ × 0.07 λ. The simulation and experimental results confirm that the metasurfaced antenna not only has simultaneous enhancements on broadside gain and bandwidth, but also improves antenna efficiency.
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Chung et al. (2011) studied this question.
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