Abstract

Beam steering and electromagnetic (EM) image scanning form a basis for a large variety of devices and applications, including wireless communication, radar, lidar, antenna arrays, and much more. Modern communication devices (cell phones being the most ubiquitous example) and various imaging systems require flat and compact beam steering, beam forming and scanning mechanisms. Toward this end, much research and development in recent years has been devoted to tunable metamaterial guides, metasurfaces and metamaterial-based apertures whose EM properties can be controlled electrically, thermally or optically. References [1–8] are but a small sample of the available literature.

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