Fig. 3
(a) Basic array antennas with defected ground plane (DGP) loaded with (i) a square slot containing the metasurface (MTS) based complementary split ring resonators (CSRR), and (ii) four oblique slots located on corners. The topside of the antenna is unchanged and similar with Fig. 1a. (b) Comparison of the S-parameter responses of the first array antenna without DGS and CSRR loading, second array antenna with DGS and CSRR loading, and third array antenna with DGS and CSRR loading and oblique slots. Comparison of the radiation properties of these antennas in terms of (c) gain, and (d) radiation efficiency. Please note that, since the array layout is symmetric, i.e., S11 = S22 = S33=S44, only S11, S12, S13, and S14 have presented to prevent unnecessary crowding. The figures and the plots have been generated by the CST Microwave Studio version 2024 as a 3D full-wave electromagnetic software. Software link: https://www.3ds.com/products/simulia/cst-studio-suite18.
