In the wireless router parameters, you can often see the antenna gain, the value unit is dBi, and the common ones are 3dBi, 5dBi, or 7dBi. Many netizens don’t know what dBi means. Today, Plum Hammer will talk about the meaning of wireless router dBi, the meaning of this value, and the frequently asked DBI is the bigger the better.
What does dBi mean?
In wireless routers, antenna gain is a relatively important parameter, because it is related to the router's transmission distance and wall penetration capability, and dBi is the unit of wireless antenna gain.
To put it simply, in a wireless router, dBi is a unit used to mark the size of the antenna gain of the router, one of the professional terms in the term router.
Is the bigger the wireless router dBi, the better?
At present, the common wireless routers can be known by checking the parameters. Most of them are 3dBi, 5dBi or 7dBi. For users, is this value the larger the better, or the smaller the better? Regarding this question, in fact, you can understand it in seconds after reading the antenna gain diagram below.
Schematic diagram of antenna gain and transmission distance
In the case of the same wireless transmission power of the router, the greater the dBi value, the higher the gain, the smaller the vertical angle, and the longer the transmission distance, but the short-distance transmission area is smaller, and the smaller the dBi value, the smaller the gain, and the vertical angle. The higher the transmission distance, although the transmission distance is not far, the short-distance radiation area is relatively larger.
At present, common wireless routers on the market generally have antenna gain values of 3dBi and 5dBi , while some of the main wall-through router antenna gains use wireless antennas with 7dBi gain.
For ordinary users, if the home area is not very large , the gain of 3-5dBi is beneficial to signal reception. If the antenna is increased without any doubt , although the wall penetration capability is enhanced, the coverage area is often more likely to have signal blind spots. Such routers often need more antennas to solve the signal coverage problem, and the product price is often a lot more expensive.