Efficiency Improvements of Antenna Optimization Using Orthogonal Fractional Experiments

Table 4

Ranges for the design parameter of the dual-antenna structure.

Parameter	Low level (−1)	High level (+1)
	3.5 mm	4 mm
	0.8 mm	1.2 mm
	3 mm	3.5 mm
	2.5 mm	3 mm
	0.8 mm	1.2 mm
	2.75 mm	3.25 mm