MIMO Channel Capacity in 2D and 3D Isotropic Environments

Table 1

Specified antenna configurations.

Class	Configuration	2D			3D			max(‖𝐀𝑖(Ω)‖^2)
		|𝜌12|	𝑔1	𝑔2	|𝜌12|	𝑔1	𝑔2
	𝑑=𝜆	0.02	0.80	0.80	0.12	0.50	0.50	1.85
Closely spaced dipoles [18]	𝑑=𝜆/2	0.17	0.73	0.73	0.01	0.50	0.50	2.20
	𝑑=𝜆/4	0.18	0.74	0.74	0.00	0.50	0.50	3.14
	“Good’’	0.34	0.42	0.42	0.04	0.50	0.50	2.96
CTIA reference antennas [19]	“Nominal’’	0.73	0.48	0.48	0.58	0.50	0.50	1.57
	“Bad’’	0.90	0.54	0.54	0.90	0.50	0.50	1.77
Cross-polarized dipoles [20]	Free space	0.00	0.38	0.38	0.00	0.50	0.50	1.50
	PEC	0.00	0.00	0.00	0.00	0.50	0.50	5.21