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What environments are fiberglass antennas suitable for?
Release time:
2024-11-28
Is it better to have a higher gain or length for fiberglass antennas? What are the specific characteristics of fiberglass omnidirectional antennas and can they be used as indoor antennas? It is estimated that non professionals cannot provide specific answers. Today, I will talk to you about omnidirectional fiberglass antennas.
Is it better to have a higher gain or length for fiberglass antennas? What are the specific characteristics of fiberglass omnidirectional antennas and can they be used as indoor antennas? It is estimated that non professionals cannot provide specific answers. Today, I will talk to you about omnidirectional fiberglass antennas.
Why are fiberglass antennas not suitable for indoor use? Many people may have noticed that many well-known brands only use 7dBi or 5dBi, 2dBi antennas on their equipment, but it is rare to see their 9dB or higher gain indoor omnidirectional antennas on the market. According to our general understanding, indoor use, 2-5dBi antennas fully meet the requirements. Antennas above 7dBi, due to their smaller angles, cannot fully exert their advantages and may have the opposite effect when used indoors. Therefore, it is recommended to use omnidirectional antennas with 9dBi or higher outdoors. As for some people who say that indoor wall penetration is effective, this statement cannot be verified and should not be overly trusted.
Why is it called an omnidirectional antenna, and why is it called a vertical angle? The omnidirectional antenna commonly used in the construction of wireless antenna systems refers to an antenna with a horizontal radiation angle of 360 degrees and a vertical fan-shaped transmission angle of about 6-15 degrees. The higher the gain, the smaller the vertical angle. For example, a 9dB antenna can achieve a radiation angle of about 14 degrees, while a fiberglass antenna can achieve a maximum of about 8 degrees. At the same position, a 15dB antenna does not receive as well as a low gain antenna.
Due to the small vertical angle, the fiberglass antenna can only transmit signals horizontally at 6-8 degrees. Therefore, it is widely used for wireless coverage in plain areas, as well as in environments with the same horizontal position. If it is mounted at a higher position, it can only transmit signals to farther positions, and cannot cover nearby or areas with height differences.
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