Abstract
The experimental realization of a multiple-input, multiple-output (MIMO) metastructure for antenna beamforming is reported. The metastructured beamformer is designed using a recently reported computational inverse design procedure that significantly reduces the required time and computational resources needed to design MIMO metastructures. This reduction in time and resources is achieved by circumventing full-wave simulations to evaluate device responses and using the adjoint variable method to evaluate gradients. To experimentally verify the MIMO metastructure’s performance, the beamformer is patterned on a microwave substrate and interfaced with a 3D-printed aperture antenna to form a multibeam antenna. Measurement results for the multibeam antenna’s performance are provided.
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