In today’s digital age, wireless routers are one of the few devices that helps us ensure a stable connection in every household. The small black box did not receive enough attention. So this article will help you “take a break” about an important function on the new generation of wifi boxes, which is the ability to support dual-band 2.4GHz and 5GHz.
Supporting both 2.4GHz and 5GHz frequency bands is only gaining popularity on the device models released in the last few years. And since then we have seen the phrase “parallel bands” appear more in ads for new products. Although there are numerous different device models with multiple differences in hardware parameters, you do not need to worry much because the basic principle behind this function has not been changed.
However, if there is only one wifi transmitter box with dual-band support, it is not enough, all devices using wifi also must support this function. But this is not a worry because most of these devices have already met this requirement. I am not saying it all, but there is the fact that devices only support the 2.4GHz band is gradually “extinct.”
First, we’ll start with the basics of radio frequency. WiFi waves work based on the application of radio waves. It was like a phone wave, or if it were a radio wave, it wouldn’t be wrong. Meanwhile, the router and wireless adapter will play the role of converting radio signals transmitted in the air into digital signals in the form of strings 0 and 1.
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Radio frequency is used to denote the tightness of the wave when encapsulated and the speed of wave propagation, and unlike television or radio signals, the rate of the wifi is much higher. This allows wifi waves to carry more data.
Scientists all know about the 2.4GHz and 5GHz bands for a long time, but it takes a long time to get the 5GHz band applied to consumer products. We all know that the higher the frequency, the more significant the amount of information it transmits, but to have such a large transmission rate, we must accept tradeoffs.
If a router is labeled “parallel bands,” it means the device is capable of encoding and decoding both the 2.4GHz and 5GHz bands. Not only that, to operate, these two frequency bands must also be supported by wireless standards equipped on routers and devices you use. Saying this may be redundant because, in addition to devices that operate on low power or older machines, there is almost no product that does not support both bands.
Not only that, but wifi waves also have many channels like FM radio. Each different channel has different frequencies, but they are all in succession on an extended range of frequencies. To avoid interference, you can catch the router using another channel that is not used by a neighbor or by any wireless device in the house.
2.4GHz and 5GHz
As mentioned above, using the 5GHz band also has its disadvantages, but to understand the changes between the 2.4GHz and 5GHz bands is not difficult. Specifically, the 2.4GHz band will allow the wifi wave to travel farther, but the signal strength will be weaker, while the 5GHz band will provide a stronger, faster signal but cannot transmit now in your family scope. In other words, all things need to use large bandwidth, put it as close to the router as possible.
A fundamental physical phenomenon can explain this: the higher the frequency, the faster the wave gets weaker, the word “wave” here also includes wifi. This is also the reason why devices using 5GHz band will also have to face many problems with barrier and obstructions when connecting to the wifi network.
And of course, the WiFi speed you get will still be limited to a certain range, but the 5GHz band will certainly deliver faster and more stable transfer speeds than the 2.4 GHz band. In theory, when using the 5GHz band, the data transfer rate will double, but in fact, the speed difference between these two bands will have to depend on many other actors (including numbers). The number of devices connected to your home wifi network).
The next difference is the maximum number of devices you can connect to the wifi network before problems arise. The 2.4GHz band has fewer channels, and only three of them are entirely overlapping, while the 5GHz band supports up to 23 channels that don’t overlap, allowing this band to support multiple devices. More suffering without affecting each other.
Many older machines only support the 2.4GHz band, which is why many people recommend that we switch to another frequency band to increase transmission speed and stability. Some examples of devices that use the same 2.4 GHz band are microwave ovens, neonatal monitors and cordless phones, and during these operations, these devices can completely cause interference.
However, a problem to consider is battery life. Using the 2.4GHz band will not consume too much power, thanks to this point, it is recommended that people use this band instead of 5GHz. But if you’re using a newer router, computer, and phone models, you probably don’t need to worry about this.
Set up your router and other devices
To set up a router with a dual-band function you have quite a bit of work to do. Let’s start by reading through the documentation to find out how to log into the router’s settings through the web browser, then take the time to scour the relevant parameters. For each router, the location of these settings can be changed.
In general, we can split routers into two types. The first type separately transmits two 2.4GHz and 5GHz bands into two different wifi networks. So you can choose the right bandwidth for you based on the distance and the amount of bandwidth needed to connect.
The other is more advanced, and it is capable of simultaneously broadcasting the two bands under the name of the same wifi network. Some devices may allow users to select the frequency band they want to connect to manually, but that is only the minority, if more information is needed, read the user guide carefully. In the case of this type of router, even if you use the latest version of Android or Windows, iOS, macOS, it is not possible to change the desired band.
However, don’t be too sad, this is also a way to help you avoid wasting time thinking about choosing the band, please feel free to use it and let the exchange between 2.4GHz and 5GHz based on the intensity signal for your router. In return, the user will not be as autonomous as expected, and there will be fewer options for error correction in case of more errors.
Or if you don’t feel confident about the choice of router, you can turn off the function of broadcasting both bands under the same wifi name so you can easily choose. This is a simple solution but will cause trouble for those who are visiting your home.