Glide-Symmetric Reconfigurable Substrate-Integrated Holey Waveguide

Glide-symmetric metasurfaces have been recently employed to realize integrated microwave devices exhibiting a reduced frequency dispersion and thus capable to operate in a wide band: planar lenses, gap waveguides, filters. They have been successfully realized with fully metallic holey metasurfaces. However, substrate-integrated technology can be adopted to ease the fabrication of this class of devices by mimicking drilled holes with tightly spaced metallized via holes. Here we investigate the possibility to reconfigure the unit cells of glide-symmetric substrate-integrated holey surfaces by modifying the effective height of its holes. Since the height of the holes cannot be reconfigured after the realization of a device, we place a high-impedance surface close to the bottom of each hole and move it to achieve a variation of the effective reactive load of each hole.