Directionalĩ dBi antennas work only in a given direction (directional action) - they are useless in a room, they are best used for long distance communication, in the yard, in the garage next to the house. This is why home routers have conventional, all-round, 2dBi antennas - so they are most effective over short distances. Get up off the couch or lie down on the floor, and the connection will immediately disappear. At home, you will have to constantly catch a narrow band of signal activity with a too powerful WiFi emitter. So it turns out that with an increase in the distance of the antenna, the area of its coverage is significantly reduced. Here is a clear illustration of how with an increase in the antenna power in dBi, its coverage area decreases. If you want to assemble a long-range WiFi antenna, then you should know about some of its features.įirst and most simple: large antennas of 15 or 20 dBi (isotropic decibels) are power-limiting and don't need to be made more powerful.
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