The terms 2×2 and 4×4 became widely used after 2009, following the introduction of Wi-Fi 4 and the implementation of MIMO technology. MIMO, which stands for “Multiple Input Multiple Output,” increases bandwidth by using multiple antennas. By separating antennas in space or changing the signal’s polarization, more data can be transmitted at the same time, significantly improving overall speed. Another approach is to use multiple transmitters and receivers. However, both the router and the connected device, such as a TV or smartphone, must support these technologies for them to work effectively.
For example, Wi-Fi 4 can reach speeds of up to 600 Mbps when using four antennas, while Wi-Fi 5 can achieve up to 6.77 Gbps with 8×8 MU-MIMO support. In general, the greater the number of antennas and spatial streams, the higher the potential transmission speed and overall network performance.
Interpretation of 2×2 3×3 and 4×4
This is how the designations 2×2, 3×3, and 4×4 appeared. For some time, they were interpreted in different ways, but most often they were explained in terms of the number of antennas in a device, since this was easier to understand.
Wi-Fi 2×2 was commonly understood to mean that a router supports four antennas. Wi-Fi 3×3, a relatively rare designation, was usually described as a router with six antennas, typically two for the 2.4 GHz band and four for the 5 GHz band. Wi-Fi 4×4 often referred to a router with eight antennas, especially in models based on the Wi-Fi 5 standard.
As part of marketing explanations, 1×1 was described as meaning two antennas: one for transmission and one for reception. However, there is also a more technical interpretation of these configurations.
Alternative Technical Interpretation and Modern Standards
A more accurate way to interpret configurations such as 1×1, 2×2, and 4×4 is to focus on data streams rather than the physical number of antennas. In this explanation, the first number represents the number of transmit streams, and the second number represents the number of receive streams.
A 1×1 configuration includes one transmit path and one receive path and represents the basic setup without MIMO technology. A 2×2 configuration uses two transmission paths and two reception paths, which under ideal conditions can effectively double the potential transmission speed compared to 1×1. A 4×4 configuration includes four transmission and four reception paths, further increasing bandwidth compared to the basic configuration.
With the arrival of newer standards such as Wi-Fi 6 and Wi-Fi 7, these designations have largely lost their relevance. Modern standards include advanced technologies for combining and managing data streams that are not strictly tied to the visible number of antennas or individual router characteristics. In many cases, these labels were used more for marketing than as precise technical parameters.
Today, routers may come with two, four, or six antennas and operate in one band (2.4 GHz), two bands (2.4 GHz and 5 GHz), or three bands (2.4 GHz, 5 GHz, and 6 GHz). That is why it is better to focus on detailed technical specifications rather than on eye-catching marketing terms.
