High-Isolation UWB MIMO Antenna with Multiple X-Shaped Stubs Loaded between Ground Planes

Table 1

Performance comparison of proposed antenna with other reported antennas.

Reference	No of elements	Dimension (mm^2)	Operating band (GHz)	Isolation (dB)	Method	Gain (dBi)	ECC
[3]	2	50 × 40	2.43–12	>15	DGS	0.4–6	<0.016
[4]	2	24 × 30	3–12.6	>16.3	Stub	2–4.8	<0.05
[10]	2	35 × 35	3–12	>20	Diversity	—	<0.3
	4	50 × 50	3.1–10.6	>15
[15]	2	23 × 26	3.1–10.6	>20	DGS	2–4.5	<0.01
[20]	2	33 × 48	2–13.7	>20	Stub	1.1–4.3	<0.15
[23]	4	30 × 30	3–11	>20	EBG	2.5–6.8	<0.006
[28]	2	50 × 35	3–11	>25	DGS and stub	4–6.2	<0.004
[31]	4	38 × 38	3–20	>17	Diversity	1.3–6.2	<0.08
[32]	2	20 × 34	3.1–10.6	>20	DGS and stub	2–4	<0.2
This work	1	18 × 12	3.7–14	>20.2; >15.5	Stubs	0.4–4.8	<0.09
	2	18 × 28	1.9–14
	4	34 × 34	1.7–14