Mutual Coupling Reduction between Two Closely Spaced Antennas with a General PMC Symmetry Plane for Mobile Terminals

Table 1

Comparisons of the decoupling performance between antenna arrays.

Ref	Decoupling schemes	BW (%)	Isolation	Max. gain	Center-to-center distance
[12]	EBG	∼2	>20 dB	—	∼0.50 λ0
[15]	Neutralization line	∼5	>20 dB	2.1 dB	∼0.50 λ0
[25]	High-order modes	∼3	>20 dB	7 dB	∼0.50 λ0
[27]	Extra coupling path	∼5.5	>15 dB	7.8 dB	∼0.44 λ0
Proposed	Extra coupling path	∼5	>20 dB	1.6 dB	∼0.3 λ0