3G fiberglass antenna

　　1. Basic concepts of 3G network and antenna

　　3G frequency band: Common frequency bands in the world include 850/900/1900/2100 MHz, which may vary slightly in different regions.

　　Antenna type:

　　External antenna: used to enhance signal coverage (such as rural areas, basements).

　　Internal antenna: integrated in the device (such as mobile phones, routers).

　　Directional antenna: long-distance focused signal (such as communication between base stations).

　　Omnidirectional antenna: 360° wide coverage (such as small base stations).

　　2. Characteristics of fiberglass antenna

　　Material advantages:

　　Lightweight: easy to install.

　　Corrosion resistance: suitable for long-term outdoor use.

　　Low cost: more economical than metal antennas.

　　Low loss: high-frequency signal transmission efficiency is higher.

　　Typical application scenarios:

　　3G base station blind spot filling.

　　Enterprise/home network expansion.

　　Internet of Things (IoT) device connection.

　　3. Purchase and installation guide

　　Key parameters:

　　Frequency band matching: ensure consistency with the local 3G network frequency band.

　　Gain (dBi): The higher the value, the stronger the signal (e.g. 5dBi~15dBi).

　　Polarization: Vertical (V) or Horizontal (H), needs to match the base station.

　　Impedance: Usually 50Ω (compatible with the feeder).

　　Installation Notes:

　　Height: As high as possible to avoid obstacles.

　　Direction: The directional antenna needs to be pointed in the direction of the base station.

　　Environment: Stay away from metal objects or strong electromagnetic interference sources.

　　4. Maintenance and Common Problems

　　Maintenance Recommendations:

　　Regularly check whether the connector is loose or corroded.

　　Clean the antenna surface (avoid using chemical solvents).

　　Troubleshooting:

　　Weak signal: Adjust the antenna position or direction and check if there is any obstruction.

　　No signal: Confirm frequency band matching and verify SIM card/device compatibility.

　　Interference: Change the antenna type or adjust the layout.

　　5. Notes

　　3G is gradually withdrawn from the network: Some countries have shut down the 3G network, and upgrading to 4G/5G may take a longer time.

　　Compatibility: Some new devices may no longer support 3G, so please confirm your needs in advance.