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A multifocal metasurface lens is designed for a K-band patch antenna array consisting of 4 × 4 elements. The lens is constructed using a two-layer “dogbone” meta-particle structure and is placed 0.5 mm away from the array. The choice of this particular design emphasizes simplicity and cost-effectiveness, without much sacrifice in performance. Full-wave simulations are performed to catalog the scattering behavior of the dogbone metaparticle along with its geometric parameters. Two methods of fabrication were investigated to fabricate the design, namely, mechanical etching and chemical etching. Experimental results show that chemical etching produced a meta-lens with higher gain compared to mechanical etching. However, the gain enhancement in both lenses is observed at a higher frequency than originally intended in the design.
David A. House andMohamed A. Salem
"Meta-lens antenna with enhanced gain at 24.125 GHz", Proc. SPIE 11460, Metamaterials, Metadevices, and Metasystems 2020, 114602W (17 August 2020); https://doi.org/10.1117/12.2568944
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David A. House, Mohamed A. Salem, "Meta-lens antenna with enhanced gain at 24.125 GHz," Proc. SPIE 11460, Metamaterials, Metadevices, and Metasystems 2020, 114602W (17 August 2020); https://doi.org/10.1117/12.2568944