Fig. 27

The maximum gain, SLL and HPBW with co-polarization in the elevation plane (xz-plane, φ = 0°) at different frequencies of the proposed antenna array with one layer superstrate (a) 16.5 GHz, (b) 16.6 GHz, (c) 16.7 GHz, (d) 16.8 GHz, (e) 16.9 GHz and (f) 17 GHz.