An apparatus comprising: a first transparent layer and a second transparent layer in a laminated arrangement; a dipole antenna comprising a first antenna element and a second antenna element , the dipole antenna located on an outer surface of the first transparent layer ; a first split ring resonator located on a first side of the dipole antenna , wherein the first split ring resonator is magnetically coupled to the dipole antenna ; and a second split ring resonator located on a second side of the dipole antenna , wherein the second split ring resonator is magnetically coupled to the dipole antenna , characterised in that : the first split ring resonator further comprises: a first resonating element coplanar with the dipole antenna ; and a second resonating element located above the first resonating element between the first transparent layer and the second transparent layer ; and the second split ring resonator further comprises: a third resonating element coplanar with the dipole antenna ; and a fourth resonating element located above the third resonating element between the first transparent layer and the second transparent layer . a first transparent layer and a second transparent layer in a laminated arrangement; a dipole antenna comprising a first antenna element and a second antenna element , the dipole antenna located on an outer surface of the first transparent layer ; a first split ring resonator located on a first side of the dipole antenna , wherein the first split ring resonator is magnetically coupled to the dipole antenna ; and a second split ring resonator located on a second side of the dipole antenna , wherein the second split ring resonator is magnetically coupled to the dipole antenna , characterised in that : the first split ring resonator further comprises: a first resonating element coplanar with the dipole antenna ; and a second resonating element located above the first resonating element between the first transparent layer and the second transparent layer ; and the second split ring resonator further comprises: a third resonating element coplanar with the dipole antenna ; and a fourth resonating element located above the third resonating element between the first transparent layer and the second transparent layer . the first split ring resonator further comprises: a first resonating element coplanar with the dipole antenna ; and a second resonating element located above the first resonating element between the first transparent layer and the second transparent layer ; and a first resonating element coplanar with the dipole antenna ; and a second resonating element located above the first resonating element between the first transparent layer and the second transparent layer ; and the second split ring resonator further comprises: a third resonating element coplanar with the dipole antenna ; and a fourth resonating element located above the third resonating element between the first transparent layer and the second transparent layer . a third resonating element coplanar with the dipole antenna ; and a fourth resonating element located above the third resonating element between the first transparent layer and the second transparent layer . <EOS>