How to make a WiFi network work better. Interference problems and metal barriers.

How to make a WiFi network work better. Interference problems and metal barriers.

Updated in 2020 Blog - Reviews and guides to buy

Currently the WiFi connection of our smart devices is an essential part of our daily lives and work. For this reason we have all felt, on occasion, intrigued by knowing the reasons that cause our device to disconnect from WiFi for no apparent reason. It is also a reason for doubts and copnsultas because in the same place throughout the day there is good coverage at one time and not at another. To try to solve some very common questions related to unstable Wi-Fi coverage, we have compiled some well-known and well-known tips from telecommunications experts, which will help us understand and perhaps solve some problems of the daily and almost magical WiFi connection.

The six most common problems of the domestic WiFi connection, and tips to solve them

1- Avoid electromagnetic interference.

The WiFi connection is established through a simple electromagnetic radio wave at a frequency of 2.4 Ghz., If we know that the distance between the WiFi waves measure about 12 cm of peak, which is less than the radio waves and a little bigger than microwaves. The similarity with other radio waves and electromagnetic, allows that the radiations produced by microwave ovens and other appliances, sometimes, interfere and even cut the WiFi connections nearby.
Advice to increase WiFi coverage: move the WiFi router away from microwaves, refrigerators, and in general all electrical appliances with electric motors. You should also avoid putting two Wi-Fi router close by as they may interfere with each other. Bluetooth transmitters and any wireless device also cause interference.

2- The distance decreases the quality of WiFi, the closer the better.

The WiFi wave loses intensity with distance. It is inevitable that when we move away, the WiFi quality will decrease, and there is a distance to which it is impossible to connect. To increase the range of distance it is necessary to improve the power of the emitter and the sensitivity of the antenna. So, if we want good data speed over WiFi, the closer the better.
Simple step to improve WiFi coverage of the router: locate the home router in the center of the room and near the computers or devices that are going to connect. The best location for a router or WiFi access point is one in which it is at a higher altitude and in direct view with WiFi clients.

3- Metal barriers, walls and thick floors slow down WiFi.

Whenever possible you have to look for direct vision between our devices and the WiFi access point. All the walls of the house and buildings stop the WiFi waves, but especially the metal barriers, avoid placing metallic objects around the router or the WiFi antennas. Metal, due to its physical properties, causes the WiFi signal to weaken.
Tips to connect via WiFi through the walls of buildings: Always avoid connecting through walls with metal beams or columns inside. Move metal furniture, metal plates, blinds, doors or refrigerators in the way of our WiFi connection. Sometimes a clumsiness as simple as putting the WiFi antenna of our receiver behind the PC tower makes the connection is cut, and just upload it on the table again. To extend the WiFi adapters and put them in a high and free location is good idea to use USB extension cables. A practical solution is the long-range WiFi antennas with 10-meter USB cable.
For these reasons, with the type of western construction of European buildings that usually have reinforced metal floors, it is more difficult to carry the cover from one floor up or down than in horizontal, light partitions usually do not slow the connection but walls thick or very reinforced floors do.

4- The WiFi router always better in a high place than on the ground.

The AP access points of Wi-Fi routers usually emit the signal in a horizontal plane, but with the distance the wave falls to the ground from top to bottom. In a graph, the WiFi coverage of an omnidirectional antenna would be similar to an umbrella. The higher the WiFi transmitter is located, the more distance and better quality we can take advantage of its coverage. On the other hand, if we place it on the ground, it will be those who are located on the floor below who receive the best coverage.

Advice to increase the distance of reach of a WiFi router: locate the WiFi router in a half wall, on a shelf or central table. The higher the AP WiFi access point is placed the more distance in the horizontal plane it will reach.

5- How to properly orientate the antennas of the router or WiFi adapter.

In the case of a router with rod-type or omnidirectional antennas. There are two ways to place the WiFi antennas of a router in order to provide better coverage to most of the users that are going to connect. In general, the antennas of the domestic routers are foldable and can be rotated, therefore we can place them horizontally or vertically depending on whether we want to send the signal up or in the same plane.
– If we put the WiFi router antennas vertical, upright: we will have good coverage in the horizontal the whole house on the same floor will receive the signal well.
– If we put the antennas lying horizontally, then the users of the lower and upper floors will also receive the signal.

For more information see this article on orientation and alignment of WiFi antennas

6- Curiosity the water slows down the WiFi signal.

Several scientific studies have shown that water absorbs energy at a frequency similar to WiFi, therefore a large mass of water can slow down the signal.

This phenomenon of mass of water that ferena the WiFi connection is the one that produces that in very rainy days I do not receive the WiFi signal that comes to us from other buildings, while on clear days it does arrive.

In the same way, a very busy place of people close to each other, being 60% water, interfere with the WiFi signal. Examples can be an airport or a conference room full of people that form a very difficult barrier to cross over a WiFi signal.
Whenever possible, get direct vision between the access point and WiFi clients. Avoid barriers and metals of all kinds and remove appliances.
Other emitters of electromagnetic waves, such as Bluetooth devices, or the neighboring Wi-Fi routers, also interfere. For this reason there are urban areas with a large proliferation of WiFi networks where it is very difficult to establish remote connections. To avoid interference, the best solution is to use the new frequency of 5Ghz free of interference.   The WiFi AC at 5Ghz is an almost free frequency that manages to get much farther and faster than the classic 2.4 Ghz WiFi.

To improve the range, in the connections that we want to establish long distance, we also use directional type WiFi antennas. Directional antennas of the Panel or Parabolic type emit all the WiFi power in only one direction. Its use is recommended for long distance connections with direct vision and at the same height.