Fig. 15
Antenna IV: model-predicted |S11| (black) and realized gain (gray) at the design found by optimizing the proposed metamodel (o), and EM-evaluated characteristic (—) at the same design; model constructed for NB = 800. The designs generated assuming the following specifications (lower and upper operating frequency): (a) F = [2.9 3.1] GHz, εr = 2.5, (b) F = [4.0 4.5] GHz, εr = 2.5, (c) F = [4.7 5.3] GHz, εr = 2.0, (d) F = [3.3 3.6] GHz, εr = 3.5. Vertical and horizontal lines mark the target operating band.
