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

Table 1

Optimization range of design variables.

	Design variable (mm)
			l1	l2			d1	d2	h1
Max	0.2	0.2	47.2	0	1.5	1.5	3.7	11.5	6.9
Min	3.5	3.5	49.2	10	3.5	3.5	5.7	13.5	7.9