16 September 2016 Microwave focusing with uniaxially symmetric gradient index metamaterials
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Previous efforts to create a metamaterial lens in the microwave X band frequency range focused on the development of a device with biaxial symmetry. This allows for focusing solely along the central axis of propagation. For applications involving wave direction or energy diversion, focusing may be required off the central axis. This work explores a metamaterial device with uniaxial symmetry, namely in the direction of propagation. Ray-trace optimization and full-wave finite element simulations contribute to the design of the lens. By changing the placement of the focus, we achieve further control of the focus parameters. While the present work uses coils, the unit cell can consist of any structure or material.
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Sara Wheeland, Sara Wheeland, Oren Sternberg, Oren Sternberg, Israel Perez, Israel Perez, John D. Rockway, John D. Rockway, } "Microwave focusing with uniaxially symmetric gradient index metamaterials", Proc. SPIE 9918, Metamaterials, Metadevices, and Metasystems 2016, 99181I (16 September 2016); doi: 10.1117/12.2237399; https://doi.org/10.1117/12.2237399


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