Mutual Coupling Reduction Using Improved Dual-Layer Mushroom and E-Shaped Stub

Table 2

Dimensions of optimized parameters of the proposed antenna.

Ref.	Method	f0 (GHz)	Freq. range (|S11|<10 dB)	Max isolation (dB)	Center-to-center spacing	Total size (mm)
[19]	EBG	5.1	/	30	0.5λ0	>0.82λ0 × 0.50λ0 × 0.03λ0
[20]	EBG	5	2.4%	34	0.5λ0	1.3λ0 × 1.0λ0 × 0.02λ0
[21]	Decoupling feeding network	7.5	9.2%	58	0.65λ0	λ0 × 1.01λ0 × 0.2λ0
This work	Stub and EBG	2.45	2.4%	39	0.5λ0	0.81λ0 × 0.33λ0 × 0.02λ0