To verify the simulation results, a 40×40 unit cell MS was fabricated and measured in an anechoic chamber. The test setup was in both reflection and transmission modes. As shown in Fig. 8(a), the reflection mode included two horn antennas for transmit and receive on the same side of the MS. An expanded view of the fabricated MS is also given in Fig. 8(b). The simulated and measured transmission and reflection results for the MS are shown in Fig. 9. It is noted that the measurements were carried out only up to 18.0 GHz again to due to the chamber limitations. Consequently, only the TM reflection resonance at 15.8 GHz could be verified experimentally. The simulated results show very good scanning up to 70° with acceptable transmission and reflection losses for both the TE and TM excitations. Measurements were carried out for broadside and for 30° incidence; those results show good agreement with the simulated results. For the reflection measurements, the simulated and measured results agree very well except below 3.0 GHz. These discrepancies have been determined to be mainly a consequence of the limited functional frequency range of the absorbers available in the anechoic chamber. The transmission measurements on the other hand, agree well with the simulated results across the whole measured band.Figure 8Measurement setup. (a) The reflection measurement and (b) an expanded view of the MS under test.Figure 9Simulated and measured transmission and reflection results for the MS. (a) Return loss - TE incidence. (b) Return loss - TM incidence. (c) Insertion loss - TE incidence. (d) Insertion loss - TM incidence.