In antennas, omnidirectional fiberglass antennas are a common type that can be used as relay station antennas. This article will explore the characteristics, installation, and whether fiberglass antennas can be used as indoor antennas, in order to gain a deeper understanding of the operation of fiberglass antennas.
As long as the antenna has high gain, it can have strong communication quality, especially when there is a requirement for wall penetration, high gain becomes a priority for users. However, in indoor home or industrial routers, the gain of the antenna is generally between 2 and 5dBi, and high gain antennas are rarely used.
The main reason is that high gain antennas are generally larger in size and inconvenient to install. On the other hand, high gain omnidirectional antennas, although radiate omnidirectionally on the horizontal plane, have a narrow coverage angle on the vertical plane (small lobe width), which has the opposite effect on relatively short communication distances. Therefore, antennas with a gain of less than 8dBi are generally chosen for indoor short distance coverage.
The so-called omnidirectional antenna refers to a horizontal plane with no directionality, but as the gain increases, the coverage range of the antenna on the vertical plane will become narrower (the lobe width will become narrower). When the gain reaches 8 dBi or more, the angle on the vertical plane will be less than 15 degrees. For intuitive explanation, we can directly refer to the following figure.
