[Q] What is the difference between the 2.4GHz band and the 5GHz band?

[A] 2.The 4GHz band is resistant to shielding, and the 5GHz band has little interference

　There are various frequency bands in radio waves, and the use of each frequency band is determined by law.Of this frequency band, it is used in Wi-Fi 2.It is called 4GHz band and 5GHz band.

　"IEEE 802", which was used when Wi-Fi was first popular.11b is 2.I used the 4GHz band radio waves, but then used the 5GHz band "IEEE 802.11a "" appears.Furthermore, "IEEE 802.11n (Wi-Fi 4) "and the latest Wi-Fi standard" IEEE 802.11ax (Wi-Fi 6) is 2.It is a standard that can use both the 4GHz band and the 5GHz band.

　2.The advantages of the 4GHz band are that radio waves can be reached far away, and that they are resistant to shields such as walls and floors.However, 2.The drawback is that the 4GHz band is also used in microwave ovens and Bluetooth, so that radio waves are likely to interfere.

　On the other hand, the 5GHz band is not used for use other than Wi-Fi (indoors), so it has the advantage of low interference.Conversely, the disadvantage is that it is vulnerable to the shield, specifically, if there is a wall or door between the access point and the Wi-Fi device (PC, smartphone, etc.), the radio wave intensity is 2..It is easier to decrease than the 4GHz band.