Controlling Leaky Waves With 1-D Cascaded Metasurfaces

A simple metasurface topology is presented which can spatially control the amplitude, phase, and polarization of leaky-wave modes. Using this technique, the tailoring of radiation patterns, including polarization, is demonstrated. The metasurfaces are modeled as full-tensor electric sheet admittances separated by dielectric layers, backed by a ground plane. These structures can be fabricated simply by stacking patterned metallic sheets. Such metasurfaces have been previously designed to control electromagnetic wavefronts incident from free space. In contrast, this communication presents a theoretical study on their application in synthesizing leaky-wave radiation patterns.