An Improvement Approach for Wide-Angle Impedance Matching Using ELC Metasurface Slabs for SIW Slot Array Antennas

Figure 4

Cross-sectional E-field mutual coupling between two adjacent SIWs at 10.0 GHz in four cases: (a) case 1: without WAIM, (b) case 2: with the ELC2 metasurface slab, (c) case 3: with a metal slab (MS), and (d) case 4: with the ELC metasurface slab.