How to choose wifi frequency band 24ghz and 5ghz

2.4GHz and 5.0GHz refer to the working frequency bands of wireless routers. (Recommended Learning: PHPSTORM )

# This 2.4G WiFi refers to the wireless frequency of 2.4GHz-2.5GHz, and 5G WIFI refers to the wireless frequency of 4.9GHz-5.9GHz , both of which are essentially electromagnetic waves, comply with the transmission law of electromagnetic wave propagation rate = frequency x wavelength. To put it in plain language: 5G can transmit farther than 2.4G, and 2.4G has stronger resistance to attenuation.

2.4GHz------enough to cope with daily network applications

The common application methods of 2.4GHz wifi: coverage and access. At present, most wireless routers and network cards in homes are 2.4GHz products. (Many low-end mobile phones on the market cannot receive 5GHz signals)

5GHz--not easy to be hacked! HD Movie transmission with higher bandwidth requirements, and online games with higher latency requirements, 5GHz wifi applications are more diverse. Streaming media LAN sharing at home, data protection, and some applications with high latency and bandwidth requirements.

In the 2.4G WiFi environment, the download speed is 24.9MB/S and the upload speed is 6.5MB/S; while in the 5G WiFi environment, the download speed is 30.9MB/S and the upload speed is 11.6MB/ S. It can be seen that under the same external conditions, 5G has obvious advantages over 2.4G.

The reason why 2.4G feels like it can “penetrate walls” better than 5G is actually probably due to the stronger diffraction ability of electromagnetic waves.

Since the main propagation mode of electromagnetic waves is linear propagation, penetration, reflection and diffraction will occur when encountering obstacles such as walls.

2.4G has a lower frequency than 5G, and the diffraction ability of electromagnetic waves (network signals) is stronger. Therefore, the statement "2.4G can penetrate walls better than 5G" is problematic. The correct summary should be "2.4G Better around walls than 5G."

Theoretically, the 2.4G bandwidth is 20MHz, the extended bandwidth is 40MHz, and the 5G bandwidth can be expanded to more than 80MHz. However, this theory may not be applicable in real life - the final transmission speed is also subject to the user's settings. Due to bandwidth limitations, 2.4G and 5G are like an Alto and a Lamborghini traveling at the same time on a school zone road with a speed limit of 30 kilometers. The speed advantage of 5G cannot be exerted.

First of all, we need to make it clear: the maximum transmit power of 2.4G and 5G is the same. The reason why the power consumption of the two is different is probably due to other reasons:

Under the premise of sufficient bandwidth, 5G transmission of the same data can be completed faster, and it can also enter a lower-power standby state faster;

In the same WiFi environment, there are multiple users using 2.4 G-band devices interfere with each other, requiring terminals to send multiple times to ensure communication quality.

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