Table 3 Verification case studies.
From: On nature-inspired design optimization of antenna structures using variable-resolution EM models
| Â | Case study | |||
|---|---|---|---|---|
Antenna I | Antenna II | Antenna III | Antenna IV | |
Substrate | εr = 3.5 h = 0.76 mm | εr = 3.2 h = 3.1 mm | εr = 3.5 h = 0.762 mm | εr = 4.3 h = 1.55 mm |
Design parameters | x = [l1 l2 l3 w1 w2 w3]T | x = [L1 Ls Lu W W1 dL dW g ls1 ls2 wu]T | x = [l0 g a l1 l2 w1 o]T | x = [Lg L0 Ls Ws d dL ds dWs dW a b]T |
Other parameters | l0 = 30, w0 = 3, s0 = 0.15, o = 5 | b = 1, wf = 7.4, s = 0.5, w = 0.5, dL2 = L1, L = Ls + g + L1 + dL2 | w0 = 2o + a wf = 1.7 | W0 = 3.0 |
Operating bands | 8-percent fractional bandwidth w.r.t. center frequencies 3.0Â GHz and 5.5Â GHz | 80Â MHz bandwidth centered at operating frequencies 3.5Â GHz, 5.8Â GHz, and 7.5Â GHz | UWB frequency band from 3.1Â GHz to 10.6Â GHz | UWB frequency band from 3.1Â GHz to 10.6Â GHz |
Parameter space | l = [15.0 3.0 0.35 0.2 1.8 0.5]T u = [50.0 12.0 0.85 1.5 4.3 2.7]T | l = [10 17 5 45 8 15 9 0.2 4 20 2]T u = [16 25 8 55 12 20 12 0.4 6 24 3]T | l = [10 10 5 5 2 0.1 0.2]T u = [35 20 15 12 15 10 3]T | l = [5 5 5 0.2 0.2 5 0.3 0.5 1.0 0.1 0.2]T u = [15 15 15 1.2 8 15 1.5 2.5 5 0.5 0.5]T |
