Hybrid Robust Optimization for the Design of a Smartphone Metal Frame Antenna

Table 3

OA (9, 4, 3, and 0.2) matrix for the conventional antenna.

Experiment	Design variable (mm)
		l1	l2	h1
1	1.5	48	1.8	6.7
2	1.5	48.2	2	6.9
3	1.5	48.4	2.2	7.1
4	1.7	48	2	7.1
5	1.7	48.2	2.2	6.7
6	1.7	48.4	1.8	6.9
7	1.9	48	2.2	6.9
8	1.9	48.2	1.8	7.1
9	1.9	48.4	2	6.7