900 1800 2100 Mhz 2G 3G 4G 3 band Mobile Signal Repeater-MF104

A tri-band signal booster enhances weak 2G, 3G, and 4G LTE signals by amplifying 900 MHz, 1800 MHz, and 2100 MHz frequencies.
Ideal for: Homes, offices, basements, villa, and remote areas with poor reception.
Plug-and-play setup with automatic gain control.

Tri-Band Cellular Signal Booster (900/1800/2100 MHz) - Technical Specifications & Functional Description

1. Product Overview

A professional-grade tri-band signal booster designed to amplify 2G (GSM), 3G (UMTS), and 4G (LTE) cellular signals across three critical frequency bands:

  • 900 MHz (Band 8) - Primary for 2G/4G in Europe/Asia

  • 1800 MHz (Band 3) - Global 4G LTE standard

  • 2100 MHz (Band 1) - Core 3G/4G frequency

2. System Architecture

① Outdoor Unit (Donor System)

  • Antenna Type: High-gain (10-12 dBi) directional Yagi or wideband omni-directional

  • Lightning Protection: Integrated gas discharge tube

  • Weatherproof Rating: IP65 enclosure

② Amplification Module

  • Gain Range: 65±3 dB (adjustable via AGC)

  • Max Output Power: 23-25 dBm (100mW) per band

  • Noise Figure: <3 dB for optimal SNR

  • Isolation Requirement: >75 dB to prevent oscillation

③ Indoor Distribution

  • Antenna Options: Ceiling-mounted panel (5 dBi) or desktop dipole

  • Multi-User Capacity: Supports 8-10 simultaneous connections

3. Key Performance Metrics

ParameterSpecification
Frequency Range890-960 MHz (Band 8) / 1710-1880 MHz (Band 3) / 1920-2170 MHz (Band 1)
Bandwidth35 MHz (900) / 75 MHz (1800) / 100 MHz (2100)
VSWR<1.5:1
Delay<5 μs
Ripple±3 dB across passband

4. Advanced Features

  • Smart AGC (Automatic Gain Control): Dynamically adjusts amplification to prevent overloading

  • Self-Diagnosis: LED status indicators for power/signal/alerts

  • Cross-Band Rejection: >50 dB interference suppression

  • Thermal Protection: Auto-shutdown at >60°C

5. Deployment Specifications

  • Coverage Area: 300-800 sq.ft (depends on building materials)

  • Cabling Requirements:

    • LMR-400 low-loss coax (max 20m run)

    • Minimum 30 dB isolation between antennas

  • Power Supply: 100-240V AC / 12V DC (PoE option available)

6. Typical Applications

  • Enterprise: Office buildings, hotels, hospitals

  • Industrial: Warehouses, manufacturing plants

  • Residential: Suburban homes, rural properties

  • Special: Underground parking, basements

Note: Installation requires professional site survey to optimize antenna placement and prevent interference with carrier networks. Most models require carrier registration in regulated markets.

Would you like additional details on any specific subsystem or installation guidelines?

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