2 × 2 MIMO Asymmetric U-Shaped Nonuniform Slot Antenna for the 4G LTE Metal-Housing Mobile Handsets

Table 3

Comparison of recently published works and proposed antenna.

Antenna	Parameters
	Slot size (mm^2)	Ground plane (mm^2)	Operating band (MHz)	Maximum gain (dBi)	Remark
Reference [2]	80 × 2	320 × 220	2400–2500	6.5–7.6	2 : 1 VSWR matching components tuning stub
			5110–5800	6.5–7.7
Reference [3]	52 × 7	157 × 200	698–960	−0.3–2	3 : 1 VSWR matching components tuning stub
			1710–2690	1.5–3.2
			3400–3800	4.4–6.2
Proposed antenna	125 × 3	160 × 70	698–960	1.1–1.5	2 : 1 VSWR
	45.25 × 1.5		1710–2700	2.5–3.1