Metamaterials are artificial materials that exhibit unusual electromagnetic properties not found in naturally occurring materials. Metamaterial surfaces – also termed metasurfaces – are generally formed using periodic metallic structures on top of a dielectric substrate, which results in enhanced surface waveguide characteristics compared to the dielectric-only substrate.
These metamaterial surfaces can also be exploited to create low-profile antennas that have wider operational bandwidths than conventional antennas above a conducting surface. Metasurfaces can also be modulated in order to control antenna radiation patterns; for example, to create directional beams
In summary, metamaterial surfaces and structures offer exciting opportunities for novel antenna designs using techniques encompassed by the field of transformational electromagnetics.
Plextek were one of the winners of the 2016 SpaRk (Small-to-Medium-sized Enterprise Partnerships Advancing Raytheon Knowledge) Competition.