Now when people purchase wireless router, they will fine a new word say "dual band wireles router", which means this wireless router support 2.4 GHz and 5 GHz two wireless spectrum. For the general consumers, don't know actually what is the dual band, and what would it be make sense?
We used to use the router only 2.4 GHz this spectrum, then as the fifth generation of WiFi protocol standard 802.11 ac was born, also had the 5 GHz band so say.5 GHz frequency band than the traditional 2.4 GHz frequency band, the most obvious advantage is surfing the Internet faster.
Nowadays, the majority of users to use wireless network, are running in the 2.4 GHz frequency band.At the same time also in the 2.4 GHz band running wireless keyboard, wireless headsets, bluetooth devices, etc., also make the spectrum was very crowded.So in the use of working at 2.4 GHz frequency wireless router, we will find that there are poor wireless signal, the network caton, the problems such as frequent drops.
2.4 GHz frequency band, a total of 13 channel due to its own characteristics, a channel signal interferes with near 5 channel signal, theory of state, only 1, 6, 11 this several channel will not interfere with each other, but in the vicinity of the signal does not necessarily is on the three channels, for now, almost impossible to find each other on the 2.4 GHz frequency channel.
If you choose to dual-band wireless router, it will effectively avoid the spectrum signal interference, because besides dual-band router in the family, almost no other things will emit 5 GHZ frequency band signal.Work in the 5 GHz frequencies, channel has 22 each other noninterference, considerably more than the 2.4 GHz frequency channel number of each other noninterference.2.4 GHz frequency band as a only three lanes of the highway, and 5 GHz frequency band is a have 22 lanes highway, which one is more clear.Using 11 and 5 GHZ frequency ac technology, support the transfer rate is higher, the bandwidth of the support is also higher.
But the 5 GHz band WiFi also has two very big disadvantages, coverage is smaller, less then penetration, if you buy a commen dual-band routers, between the two walls to connect the router to 5 GHz band, your signal and speed become very unstable, so the 5 GHz band for home router, is only suitable for use in the same room, if is family to use, in the other room is more suitable to use 2.4 GHz frequency range.