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

Figure 5

Mutual couplings between two adjacent SIWs at 10.0 GHz in the four cases. (a) Amplitude and (b) phase. The value following the underline in the graph legends presents the height of the slab.

(a)

(b)