Apparatus for reflecting electromagnetic waves and method of operating such apparatus preliminary class

Radio device comprising a radio interface configured to wirelessly exchange data with at least one further device, wherein said radio device comprises an apparatus comprising a reflective surface configured to reflect non-visible electromagnetic waves in a millimeter wave range having a radio frequency (RF) of 3 gigahertz or greater, wherein a reflective response of at least one portion of said reflective surface having liquid crystal or graphene elements with respect to said electromagnetic waves is electronically controllable, wherein said apparatus is configured to at least temporarily control said reflective response of said liquid crystal or graphene elements of said at least one portion of said reflective surface, wherein said radio device is configured to:

• establish a first communications channel with said at least one further device using said electromagnetic waves, and
• establish a second communications channel with said at least one further device by at least temporarily controlling said reflective response of said liquid crystal or graphene elements of said at least one portion of said reflective surface to modulate information into the reflected electromagnetic waves by generating an electronic control signal to change a reflective property of said liquid crystal or graphene elements of said at least one portion of said reflective surface, wherein said radio device is configured to wirelessly exchange data with said at least one further device using said first communications channel to receive incoming data from said at least one further device and said second communications channel to transmit outgoing data to said at least one further device, wherein said radio device generates said outgoing data based on said incoming data.