The proposed MS was simulated and optimized in ANSYS-HFSS using master-slave periodic boundary conditions and two Floquet ports to illuminate both sides of the MS. The copper-cladded Rogers RT/DuroidTM 5880 with a relative dielectric constant of 2.2 and a height of Hsub = 0.254 mm was selected as the substrate. The TC-UAJC elements were etched on the 17 μm thick copper sheet on the top surface of the dielectric substrate. To minimize the simulation time and the amount of discretization, the metals in the HFSS model were taken to be perfect electric conductors (PECs). To verify the MS simulation results, a 40×40 unit cell array was fabricated and measured in an anechoic chamber. Measurements were carried out using an Agilent vector network analyzer and two horn antennas to obtain the transmission and reflection coefficients for both TE and TM polarizations by rotating the horns through 90°. In the transmission case, the horn antennas are place equidistant on opposite sides of the MS and the signal received from the transmitting horn is measured for both broadside and 30° incidence. For the reflection measurements, the transmit and receive horns were on the same side of the MS as shown in Fig. 8. The effective medium parameters of the MS were extracted from the MSs S-parameters using MATLAB and the method described in ref.50.