1. Basic concepts of 2G network and antenna
2G frequency band: Common frequency bands in the world include
850/900/1800/1900 MHz (different countries/operators may have slight
differences).
Antenna type:
External antenna: used for signal extension (such as remote areas, weak
indoor coverage).
Internal antenna: integrated in terminal equipment (such as old mobile
phones, IoT modules).
Directional antenna: long-distance directional coverage (such as backhaul
between base stations).
Omnidirectional antenna: 360° all-round coverage (such as small base
stations, hot spots).
2. Characteristics of fiberglass antenna
Material advantages:
Lightweight: The weight is about 30%-50% of that of metal antennas, and it
is easy to install.
Corrosion resistance: acid and alkali resistance, strong weather
resistance, suitable for long-term outdoor use.
Low loss: The signal transmission efficiency of high-frequency bands is
better than that of plastic antennas.
Low cost: low material and production costs, high cost performance.
Typical application scenarios:
2G base station blind spot coverage.
Industrial Internet of Things (LoRa and NB-IoT may need to be compatible
with 2G frequency bands).
Signal enhancement for old devices (such as walkie-talkies and POS
machines).
3. Purchase and Installation Guide
Key Parameters:
Band Matching: Strictly match the local 2G network band (such as 900MHz vs.
1800MHz).
Gain (dBi): Common range 3dBi~12dBi (the higher the gain, the farther the
coverage).
Polarization: Vertical (V) or horizontal (H), must be consistent with the
base station.
Impedance: Usually 50Ω (compatible with feeder).
Standing Wave Ratio (VSWR): ≤1.5, to ensure signal transmission
efficiency.
Installation Notes:
Height Priority: Try to install it in a high place (such as rooftops, iron
towers), avoid obstacles.
Direction Adjustment: The directional antenna needs to be aligned with the
base station (can be calibrated by a signal strength meter).
Environmental Requirements: Stay away from metal objects and strong
electromagnetic interference sources (such as microwave ovens and high-voltage
lines). 4. Maintenance and FAQs
Maintenance recommendations:
Regularly check the antenna interface for oxidation or looseness.
Clean the antenna surface (avoid using corrosive solvents).
Confirm the stability of the bracket after rain or shine.
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