See this topic, there may be some small partners a bit of a circle, the antenna is of course used to transmit and receive signals, can wi-Fi still be used without an antenna? Hey, you really don't have to say, try to remove the antenna of the router or network card, it is likely that you will find that there is still a signal. Xiaobian even saw some small partners in order to be beautiful or convenient to place, dismantled the network card or even the use of router antennas, is this really a problem? Let's talk about Wi-Fi antennas today.
First of all, whether it is useful or not, it is estimated that the small partner who has tried to remove the antenna must have also found that it has obvious effects on the signal. But how much of an impact does it have? Some media found a router that can remove the antenna and tried it. The test consisted of copying a 5GB video from a PC over a WiFi network from a laptop to calculate the average download rate.
It can be seen that at a distance of 1 or 2 meters, the signal strength of the two is similar, but at a distance of 5 meters or more, the gap is getting bigger and bigger. It is said that in the process of testing, there was a disconnection when there was no antenna configuration, which was actually a flashing of the Wi-Fi signal. This test also illustrates the practical use of the antenna, which is signal enhancement, especially at longer distances.
According to the regulations, the electromagnetic radiation of the router itself is actually that the signal power cannot be higher than 100mW to ensure the health of the user, and the signal strength is probably to ensure the Wi-Fi speed within 2 meters. Although the Wi-Fi antenna should ensure the signal strength of the longer distance, it cannot directly increase the intensity of electromagnetic radiation, otherwise it is violated. They are electromagnetic wave signals that were originally emitted in all directions to "gain" signals by enhancing directionality or even focusing directly on the direction of the device.
Therefore, Wi-Fi antennas also have a lot of attention in use. For example, the antenna angle can be adjusted according to the position of the device to obtain better results, and the "smart antenna" can be better focused. But it should be noted that the replacement of a third-party high-gain antenna is not advisable, the original antenna of the device is optimized according to the actual signal control ability, the forced gain signal is likely to introduce a lot of "noise", it seems that the signal is stronger, in fact, the signal quality is not good, so the transmission speed, stability is likely not to increase but will decline.
Antenna problems can also cause some common network failures, such as sudden deterioration of the signal in a certain location or frequent disconnection, which may be a problem with the corresponding antenna of the router. For example, some routers use separate antennas for 2.4G and 5G bands, and if the 5G band is significantly worse than before, and the 2.4G band does not change, you can focus on checking the router's 5G band antenna. If all the bands are wrong, you can try adjusting the antenna angle or disassembling them one by one to determine the faulty antenna.
As for notebooks, NAS, all-in-one machines, these devices often have a significant decrease in signal strength or speed reduction after dismantling and maintenance, and it is necessary to see if the antenna has fallen off the network card. The built-in antenna they use is generally connected with a very small buckle and the built-in network card, disassembling and cleaning, maintenance is easy to pull open or install unrealistically, should be used to nails or small screwdriver vertically pressed, heard a slight "click" sound is in place stuck.