LMR-400 Coaxial Cable
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LMR-400 Coaxial Cable: Comprehensive Information
Overview
LMR-400 is a high-performance coaxial cable widely used for various RF (radio frequency) applications due to its low loss and flexibility. It is designed to transmit signals with minimal attenuation, making it ideal for long-distance and high-frequency transmissions. LMR-400 is commonly used in wireless communication systems, including cellular, Wi-Fi, satellite, and antenna installations.
Key Features of LMR-400 Coaxial Cable
- Low Loss: LMR-400 offers excellent low-loss characteristics, making it suitable for long cable runs.
- Flexible: Despite its low loss, LMR-400 is more flexible than rigid cables, facilitating easier installation.
- Wide Frequency Range: Supports a wide range of frequencies, making it versatile for various applications.
- Durable Jacket: Comes with a UV-resistant polyethylene jacket, which makes it suitable for outdoor use.
- High Shielding: Features a double shield (foil and braid) for superior EMI/RFI (electromagnetic interference/radio frequency interference) protection.
- Temperature Resistant: Can operate effectively across a wide temperature range.
Technical Specifications
- Impedance: 50 Ohms
- Center Conductor: Solid bare copper, 0.108 inches (2.74 mm) diameter
- Dielectric: Foam polyethylene, 0.285 inches (7.24 mm) diameter
- Outer Conductor: Aluminum tape, bonded to the dielectric
- Shielding: Tinned copper braid, 0.32 inches (8.13 mm) diameter
- Jacket: UV-resistant polyethylene, 0.405 inches (10.29 mm) diameter
- Attenuation:
- 450 MHz: 3.9 dB/100 feet
- 900 MHz: 5.8 dB/100 feet
- 1500 MHz: 7.6 dB/100 feet
- 2400 MHz: 10.1 dB/100 feet
- 5800 MHz: 16.6 dB/100 feet
- Operating Temperature: -40°C to +85°C
- Weight: 0.068 lb/ft (0.101 kg/m)
- Minimum Bend Radius: 1 inch (25.4 mm)
Benefits
- Reduced Signal Loss: Ensures higher signal strength over longer distances, which is crucial for maintaining quality communication links.
- Versatility: Suitable for a variety of RF applications, including amateur radio, CB radio, and TV antenna installations.
- Outdoor Use: The UV-resistant jacket allows for outdoor installations without degradation from sunlight exposure.
- EMI/RFI Protection: The high shielding effectiveness ensures minimal interference from external sources.
- Durability: Robust construction provides long-lasting performance even in harsh environmental conditions.
Applications
- Cellular Network Systems: Used for connecting cell site antennas to base station equipment.
- Wi-Fi Systems: Extends Wi-Fi networks by connecting routers to antennas or other networking equipment.
- Satellite Communication: Ideal for satellite dish installations and other satellite communication systems.
- Amateur Radio: Popular among ham radio operators for connecting transceivers to antennas.
- Broadcast Systems: Used in various broadcasting applications to ensure clear signal transmission.
- RFID Systems: Suitable for RFID antenna installations.
- Public Safety Communications: Ensures reliable communication for emergency services.
Installation Tips
- Cable Routing: Plan the cable route to avoid sharp bends and minimize the number of connectors.
- Connector Selection: Use high-quality connectors compatible with LMR-400 to ensure minimal signal loss.
- Weatherproofing: For outdoor installations, ensure all connections are properly weatherproofed to prevent water ingress.
- Secure Mounting: Use appropriate clamps and supports to secure the cable and prevent it from moving or being damaged.
- Grounding: Properly ground the cable to protect against lightning strikes and electrical surges.
Example Use Cases
- Residential: Connecting a rooftop TV antenna to an indoor receiver.
- Commercial: Linking outdoor Wi-Fi antennas to network routers in a large office building.
- Industrial: Setting up RF communication systems in manufacturing plants.
- Public Venues: Extending cellular coverage in stadiums, convention centers, and other large public spaces.
- Rural Areas: Improving connectivity in remote locations with weak signal reception.
Maintenance and Care
- Regular Inspection: Periodically inspect the cable for signs of wear, damage, or corrosion.
- Clean Connections: Ensure all connections are clean and secure to maintain optimal performance.
- Replace Damaged Sections: Promptly replace any damaged sections of the cable to prevent signal loss.
- Proper Storage: Store excess cable in a dry, cool place to prevent degradation.
Conclusion
LMR-400 coaxial cable is a versatile and reliable solution for a wide range of RF applications. Its low-loss performance, flexibility, and durability make it ideal for both indoor and outdoor installations. Whether for cellular networks, Wi-Fi systems, or satellite communications, LMR-400 ensures robust signal transmission with minimal interference. Proper installation and maintenance can further enhance its performance and lifespan, making it a valuable component in any communication setup.