In contrast to single band routers, dual band routers guarantee higher data transfer rates and are not subject to interference
For many it resembles a nightmare. Even if you move a few inches or a couple of meters at most, the signal of the Wi-Fi network suddenly collapses and you can no longer surf. A problem, in the vast majority of cases, depends on the Wi-Fi router that you use at home.
It may happen, due to too many devices connected at the same time or various interferences, that the wireless network does not perform as it should and you have the Wi-Fi slow. In cases like these, sometimes you have only one solution: change routers and buy a dual band one. This should allow you to increase the data bandwidth available and avoid that other devices end up interfering with the transmission of data between the various devices connected to the same network. How? Thanks to physics (in particular the laws of electromagnetism) and a peculiarity that allows such devices to work "undisturbed".
What are dual band routers
As the name suggests, a dual band router is characterized by the ability to create a Wi-Fi network using two different radio frequencies. In this way, you can create a wireless network in your home (or office) either by using the "ordinary" 2.4 gigahertz band or by relying on the 5 gigahertz band. The reason for this double choice is explained by a purely physical point of view, but everything can be exposed in a clear way even for those who do not have great knowledge (to use a euphemism) in the field of electromagnetism.
Although covering a smaller area (a wave with higher frequency loses strength more quickly), the network based on the 5 gigahertz band guarantees much higher connection speed and a better ability to cover the so-called black spots, or those points of the house or office difficult to reach with the radio signal of a normal Wi-Fi router. The 5 gigahertz band, moreover, is less subject to interference: contrary to the 2.4 gigahertz band, also used by the TV remote control, the microwave and the cordless phone, it is actually unused. This means that the Wi-Fi signal will be stronger and more stable and will allow you to exchange data faster.
The advantages for the connection of home and office
Although not allowing you to extend the Wi-Fi signal (for that, for example, there are mesh networks), a dual band router is a viable solution in case the home network (or a small office) has problems of stability or interference. As we have seen, in fact, the wireless connection on 5 gigahertz band is more stable and guarantees a greater speed in the exchange of data between the various nodes of the network.