What determines the strength of WiFi signal?

What determines the strength of WiFi signal?

The signal strength of WiFi on the router is determined by the transmit power and gain antenna.

In terms of transmit power, our country clearly stipulates that the transmit power of a single antenna cannot be greater than 100mw. No matter how expensive the router is, the transmit power cannot be greater than this value. (Some routers can manually increase the transmit power by flashing third-party firmware)

The conventional router gain antennas are mostly 3dBi, 5dBi or 7dBi. The larger the dBi value, the better, because the larger the value, the longer the transmission distance, but the smaller the vertical coverage angle. The router's coverage of the home is not so good. Therefore, the antenna of the home router is generally around 5dBi.

Many businesses advertise the ability of their routers to penetrate walls, but in fact, they have mentioned the issue of transmit power and gain antennas. Therefore, the wireless signals of high-end routers and low-end routers on the market are not much different (the quality of the wireless signal of the router is not determined by the number of antennas)

Therefore, if you live in a large apartment and want to achieve the signal coverage of the whole house, you don't expect to change a more expensive Niucha router to do this. Honestly and practically use the main route + auxiliary route relay method. Two routes of 300 yuan are relayed to each other, and the coverage is definitely wider than a route of 1,000 yuan.

Regarding the wireless relay method, the simplest is the dual-route seamless roaming solution that supports the 802.11V (k, r) protocol, in addition to the power cat solution, the mesh ring network solution and the AC+AP global solution. These solutions can be used flexibly according to the on-site situation. The length issue will not be explained in detail here.