Design of a Practical and Compact mm-Wave MIMO System with Optimized Capacity and Phased Arrays

Table 3

Array gain reduction by increasing the number of MIMO nodes (2 × 2 set as reference).

MIMO elements	Gain difference (dB)	Subarray dimension	Total antennas	Array HPBW (°)
2 × 2	0	32 × 32	4096	2.4
3 × 3	−7.47	16 × 16	2048	5.2
4 × 4	−11.21	11 × 11	968	7.7
5 × 5	−13.48	8 × 8	576	10.6
6 × 6	−15.00	7 × 7	686	12.1
7 × 7	−16.12	6 × 6	576	14.2
8 × 8	−16.98	6 × 6	576	14.2