  A reconfigurable millimeter-wave artificial waveguide using glide-symmetric
pin-like contact-less metasurfaces is proposed in order to enable low loss and
high-power-handling capability in switching operations. Thanks to the
remarkable behaviour of glide symmetry, the meta-structures are used both as
wide-band EBG material to confine the field in the guide and as low-dispersive
guiding medium filling the guide itself. The reconfigurability is achieved by
adjusting the displacement between the metasurfaces. A higher displacement
enables propagation within the waveguide and a lower displacement suppresses
it. A two-state reconfigurability is therefore designed, allowing the device to
act as an on-off switch in the V-band. In particular, a dispersion analysis
highlights the potential of such technology to achieve switching operating over
a 55-66 GHz frequency range. A complete design including matching mechanism and
WR15 feeding is also described and shown to exhibit a $S_{11}<-10$ dB bandwidth
from 57.4 to 62.8 GHz. In the "off" state, the switch isolation is better than
65 dB and in the "on" state, the insertion losses are better than 0.7 dB within
the entire operating frequency range. The isolation between two adjacent
waveguides is also discussed to assess the integration of such a device within
a switching network.
