The strength of the WiFi signal is related to this core factor. Don't get it wrong.

When buying a wireless router, you should buy one with large antennas and many antennas? I believe that many friends have this idea in their minds. Opening the wireless router sales page of the e-commerce website, we can find that wireless routers with 3 or more antennas basically occupy the top few hot-selling products. This also reflects the mentality of consumers when buying wireless routers now, "the more antennas, the better the signal." It is difficult to solve the problem of wireless signal at home simply by using a wireless router with multiple antennas. There are many factors that affect the strength of wireless signals.

[[261540]]

The built-in antenna also has a strong signal

The reason why wireless routers have multiple antennas is actually because of MIMO technology. Whether it is a product with 2 antennas or 3 antennas, it is to match the X*X MIMO mode. For example, the current mainstream single-band 300M and 867Mbps wireless routers must have a 2x2 MIMO mode, which means that two antennas are enough. If there are 3 or more antennas in a 2x2 MIMO product, it is the manufacturer's misleading of consumers. Moreover, with the popularity of dual-band wireless routers, some manufacturers have made independent external antennas for each frequency band, so it is not surprising that some wireless routers with 4 or 6 antennas have appeared.

Transmission power directly affects the strength of wireless signals

Importantly, the decisive factor for the quality of wireless router signals is the transmission power of the wireless router. All countries have regulations on the transmission power of wireless routers, which generally shall not exceed 100mW, that is, 20dBm (2.4GHz frequency band). So we can see that, in fact, according to national standards, the signal strength of the transmitter is fixed. No matter how many antennas there are, its transmission power will not change, and it will not affect the coverage of the wireless signal. In addition to the wireless router, we should also look for the cause from the receiving end. If the sensitivity of the wireless network card at the receiving end is not high, then the wireless Internet experience will be very poor.