SIS designed and implemented a professional Cel-Fi indoor coverage enhancement solution using advanced RF engineering methodologies and optimized antenna distribution architecture.
The implementation included:
• Professional RF site survey and analysis
• Cel-Fi QUATRA deployment
• Indoor antenna distribution system
• Outdoor donor antenna installation
• RF optimization and balancing
• Multi-operator configuration and testing
• Commissioning and system fine-tuning
The solution was engineered to provide stable and reliable indoor coverage throughout the refinery facilities while minimizing passive RF losses and improving overall signal quality.
Supported Operators
The deployed solution successfully supports:
• STC
• ZAIN
• MOBILY
Providing reliable multi-operator coverage across operational and administrative areas.

Key Technical Highlights
• Advanced RF design and optimization
• Enhanced indoor voice and data performance
• Improved SINR and signal stability
• Balanced indoor antenna distribution
• Reduced weak coverage areas
• Optimized passive RF losses
• Reliable coverage in industrial environments
Project Outcome
Following implementation and optimization, the project achieved:
• Significant improvement in indoor cellular coverage
• Enhanced operational communication
• Better mobile internet experience
• Improved workforce connectivity and mobility
• Stable multi-operator performance
• Reduced customer complaints related to mobile signal quality
• Improved communication reliability across critical operational zones
Solution Components
• Cel-Fi QUATRA Units
• Indoor Ceiling Antennas
• Outdoor Donor Antennas
• RF Distribution Network
• Structured Cabling Infrastructure