Is the higher the gain or length of the fiberglass antenna the better? What are the characteristics of the specific fiberglass omnidirectional antenna, and can it be used as an indoor antenna? It is estimated that non-professional personnel cannot give specific answers. Today, Xiaobian will talk to you about the omnidirectional fiberglass antenna.

Why FRP antennas are not suitable for indoor use, it is estimated that many people may notice that many well-known brands generally only use 7dBi or 5dBi, 2dBi antennas, but rarely see their 9db or higher gain on the market According to our general understanding, the 2-5dBi antenna has fully met the requirements for indoor use. Antennas above 7dBi cannot exert their advantages due to the smaller angle, and may be counterproductive when used indoors. Therefore, omnidirectional antennas above 9dBi must be recommended for outdoor use. As for some people who say that indoor use through walls is effective, this statement cannot be verified, and there is no need to believe it too much.

Why is it called an omnidirectional antenna? There is also a vertical angle. The omnidirectional antenna often mentioned in the construction of a radio antenna feeder system refers to an antenna with a horizontal radiation angle of 360 degrees, and a vertical sector emission, with an angle of generally 6~15 degrees. Left and right, the higher the gain, the smaller the vertical angle. For example, the 9db antenna can achieve a radiation angle of about 14 degrees, while the fiberglass antenna can achieve about 8 degrees, which is the limit. In the same position, the 15db antenna is not as low as the reception. The effect of the booster antenna is good.

Because of the small vertical angle, the signal can only be transmitted at 6~8 degrees horizontally. Therefore, the fiberglass antenna is widely used in the wireless coverage of the plain area, the wireless coverage of the same horizontal position environment, and the wireless coverage of the same horizontal position environment. If If it is placed in a higher position, it can only transmit signals to distant positions, but it cannot cover the places near or with height difference.