Efficiency Improvements of Antenna Optimization Using Orthogonal Fractional Experiments

Table 7

Ranges for the design parameter of the internal antenna for LTE handheld devices.

Parameter	Low level (−1)	High level (+1)
	30 nH	40 nH
	1.5 mm	2.0 mm
	0.8 mm	1.2 mm
	2.5 mm	3.5 mm
	1.0 mm	2.0 mm
	1.0 mm	2.0 mm
	2.8 mm	3.3 mm
	0.4 mm	0.6 mm
	2.3 mm	2.8 mm
	18 mm	20.5 mm
	22 mm	23.5 mm
	20 mm	21.5 mm