An outdoor booster for multiple operators simultaneously works by using a multi-band repeater system. It captures weak 2G, 3G, and 4G signals from different carriers, amplifies them, and then rebroadcasts the stronger signals indoors.
When you needrequiring coverage for 3bands, would you use 3pcs single-band repeaters used simultaneously or 1pc 3bands repeater?
GSM (2G):Frequency Band: 900 MHz
3G:Frequency Band: 2100 MHz (UMTS/WCDMA standard)
4G:Frequency Band: 1800 MHz (LTE standard)
Frequency range :
GSM :
890MHz—915MHz(Uplink) ;
935MHz—960MHz(Downlink )
DCS ( 4G IN BAND 3 ) :
1710-1785 ( UPLINK )
1805-1880 ( DOWNLINK )
3G :
1920MHZ–1980MHZ (uplink) ;
2110MHZ–2170 MHZ (downlink)
3bands simultaneously, so there will be 3pcs “BS” port to connect each band Receive Antenna to receive each band Signal.
900MHz Receive Antenna towards to 900MHz Base Station to get 900MHz input signal.
1800MHz Receive Antenna towards to 1800MHz Base Station to get 1800MHZ input signal.
2100MHz Receive Antenna towards to 2100MHz Base Station to get 2100MHz input signal.
How a multi-band booster works
- Capture multiple frequency bands. All cellular networks operate on specific frequency bands. A tri-band booster contains filters and amplifiers that are designed to capture signals from three different frequency bands at the same time. It does not decode or differentiate between carriers but instead amplifies all signals that fall within its supported bands.
- Outdoor antenna placement. A high-gain outdoor antenna, typically directional, is mounted in a location with the best possible signal reception, such as on a roof. This antenna is aimed at the nearest cell tower(s) to pull in the weak 2G, 3G, and 4G signals from various operators.
- Signal amplification. The captured signals travel via cable to a central amplifier unit, which strengthens the incoming signal across all the supported bands simultaneously. Many modern repeaters also feature Automatic Gain Control (AGC) to prevent signal overload and maintain a consistent output.
- Indoor signal distribution. The amplified signal is then sent through a cable to one or more indoor antennas, which rebroadcast the stronger signal throughout the desired indoor area.
- Multi-operator support. Since cellular networks can share frequency bands, a single multi-band booster can boost signals for any operator that broadcasts on those bands.For example, if two different operators both use the 1800 MHz band, the booster will improve the signal for both carriers.
- Outdoor (donor) antenna: Captures the weak signal from the cell tower. Its effectiveness depends on proper placement and direction.
- Amplifier/Repeater: The central unit that processes and boosts the signal.
- Indoor (service) antenna: Re-transmits the amplified signal to your mobile devices.
- Coaxial cable: Connects the antennas to the amplifier.
- Rx Antenna-Donor Antenna- Receive antenna use “Grid Antenna” ;
- Tx Antenna-Service Antenna- Transmit Antenna – Coverage antenna use “Panel Antenna”
What to consider when buying a booster
- Check compatibility: Before buying, you must confirm that the booster supports the specific frequency bands used by the cellular providers in your area. You can often find this information from your mobile operator or by using apps that check network bands.
- Mind the distance: There must be sufficient distance between the outdoor and indoor antennas (ideally 30+ feet) to prevent a feedback loop, which can cause the booster to shut down.
- Professional installation: For the best results, especially in complex environments, professional installation is recommended.
Post time: Sep-13-2025