We fabricated an optically transparent monopole antenna using graphene film and
investigated the feasibility of the film as an electrode material for antennas. A low sheet
resistance (80 Ω/sq) was attained by stacking the graphene films and carrier doping with an
ionic liquid. The optical transmittance of the carrier-doped three-layer stacked graphene film
was greater than 90%, enabling it to be embedded in highly transparent objects without
altering their landscape. Using the monopole antenna structure with a metal ground plane …