There are multiple ways of creating a good MIMO antenna setup. As an example: a MIMO 4×4 cellular router, may be connected to four SISO antennas, to two MIMO 2×2 antennas or, finally, to a single MIMO 4×4 antenna. This antenna selection tool will present you with 4×4, 2×2 and 1×1 antenna options. For certain installation setups, it might be beneficial to go for a mix of antenna types. For an expert’s advise, please reach out to your distributor.