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Guidelines for the use of FRP antennas
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One of the more common types of antenna is the omni-directional FRP antenna, which can be used as a repeater antenna. In this article, we will discuss the characteristics of FRP antennas, their erection and whether they can be used as indoor antennas, to gain an insight into how FRP antennas operate.
1710~2700MHz 6dBi gain omnidirectional omni series antenna
First, is the FRP antenna suitable for indoor use?
This answer can't be particularly accurate, many users feel that as long as the antenna is high gain, it can have strong communication quality, especially when there is a requirement for wall penetration, high gain becomes the first choice 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 omni-directional antennas, although omnidirectional radiation in the horizontal plane, but the vertical plane radiation angle coverage is very narrow (small flap width), in the relatively short communication distance range is counterproductive, so generally in the indoor short distance coverage will choose 8dBi gain antennas or less.
→ Tips：Why do omni-directional antennas also have the communication coverage angle?
The so-called omni-directional antenna refers to the horizontal plane without directionality, but as the gain increases, in the vertical plane, the range covered by the antenna will become narrower and narrower (the narrower the width of the wave flap), after the gain reaches 8dBi or above, the angle in the vertical plane will be less than 15 degrees, in order to intuitively illustrate, we can directly look at the figure below.
The blue position in the above diagram is the transmitting and receiving range of the antenna. The same position, 15dBi antenna reception is not as good as the effect of low gain antenna.
Second, the use of glass steel antenna introduction
According to the schematic diagram given above, when using high gain FRP antenna, you must pay attention to the radiation direction diagram of the FRP antenna, especially the width of the wave flap in the vertical plane. When using a high gain FRP antenna, the radiation angle in the vertical plane of the antenna will be very narrow, so that the transmitting and receiving antennas are required to be at the same horizontal position as far as possible.
We can calculate the height of the antenna according to the required communication distance, coverage and the antenna's flap width, so as to ensure the communication quality of the high gain antenna.
