Hefei Bri Electronic & Technology Co., Ltd. presents the premier LMR400 cable, an industry-leading braided cable designed to elevate your telecommunications infrastructure. Engineered specifically for demanding RF environments, this 50 Ω coaxial cable is the optimal choice for powering modern cellular radio networks. Featuring a robust 2.74±0.02mm copper clad aluminum inner conductor and an advanced foam PE dielectric, it guarantees exceptional signal transmission with minimal loss.
When deploying intricate Distributed Antenna Systems (DAS), securing reliable Cellular In-building Coverage is critical. Our LMR400 cable meets this challenge head-on, offering an 86% tinned copper braid coverage that provides outstanding shielding against electromagnetic interference. The durable black PE jacket ensures long-lasting performance in both indoor and outdoor installations, withstanding operating and installation temperatures from -40~+80℃. Whether you are upgrading base stations or expanding complex RF feeder systems, our high-quality RF coaxial solutions provide a superior, manufacturer-direct alternative to standard Hansen cable. Trust in our engineering to deliver the high-efficiency connectivity required for seamless Cellular In-building Coverage and robust cellular radio communications.
Applications of the LMR400 Cable
As a premium 50 Ω transmission line, the LMR400 cable is widely recognized as the industry standard for high-power, low-loss RF applications. Manufactured directly by Hefei Bri Electronic & Technology Co., Ltd., this robust braided cable is meticulously engineered to support broad frequency ranges—including 350-3800MHz and 555-6000MHz—making it fully optimized for both legacy networks and next-generation 5G integration.
Primary Applications Include:
Cellular Radio & Base Stations: Ideal for main RF feeder systems connecting antennas to base station equipment, where maintaining ultra-low signal attenuation over long distances is critical.
Cellular In-building Coverage (DAS): Acts as the high-capacity backbone for Distributed Antenna Systems, ensuring strong, uninterrupted Low-PIM cellular signals throughout large commercial complexes and high-rises.
Corrugated Cable Replacement: Provides a highly flexible, cost-effective, and manufacturer-direct alternative to rigid corrugated copper cables like Hansen cable, delivering exceptional performance when properly terminated with our precision N female connectors.
LMR400 vs. LMR240: Which Braided Cable is Right for Your Project?
While both are exceptional 50 Ω solutions for RF systems, choosing between the LMR400 cable and the LMR240 cable depends entirely on the specific routing environments and signal preservation requirements of your installation.
| Feature | LMR400 Cable | LMR240 Cable | Engineering Takeaway |
| Outer Jacket Diameter | 10.29 ± 0.18mm | 6.15 ± 0.13mm | The LMR240 is much thinner, making it ideal for tight, space-constrained conduits. |
| Signal Attenuation (at 1500 MHz) | Typical 5.1 dB/100ft | Typical 10.0 dB/100ft | The LMR400 cable offers nearly half the signal loss, making it mandatory for long transmission runs. |
| Minimum Bend Radius | 25.4mm | 19mm | The LMR240 offers sharper routing flexibility for complex internal cabinet wiring. |
| Weight | 100 kg/km | 50 kg/km | The LMR240 is significantly lighter, reducing physical strain on overhead trays during indoor DAS deployment. |
| Primary Network Role | Main RF feeder lines, cellular radio towers, and primary DAS backbones. | Jumper cables, endpoint antenna connections, and short-run confined routing. |
Technical Specifications
Cable Construction
| Component | Material | Dimensions |
| Inner Conductor | Copper Clad Aluminum | 2.74±0.02mm |
| Dielectric | Foam PE | 7.24±0.13mm |
| Outer Conductor | Bonded Dual Al Foil + Tinned Copper (86% Coverage) | 24*7*0.16*42 |
| Jacket | PE(Black PE) | 10.29±0.18mm |
Electrical Characteristics
Impedance: 50±2Ω
Velocity: 85%
Capacitance: 24PF/FT
Jacket spark (V.RMS): 8000
Return loss (30~2800MHz): ≥20.8 dB
Mechanical Characteristics
Tensile Strength: 73 kg
Weight: 100kg/km
Min Bend Radius: 25.4mm
Storage Temperature Range: -70~+85℃
Installation Temperature Range: -40~+80℃
Operating Temperature Range: -40~+80℃
Attenuation
| Frequency (MHz) | Typical (dB/100ft) | Max (dB/100ft) |
30 | 0.76 | 0.84 |
50 | 0.97 | 1.07 |
150 | 1.5 | 1.7 |
220 | 1.9 | 2.1 |
450 | 2.7 | 3.0 |
900 | 3.9 | 4.3 |
1500 | 5.1 | 5.6 |
1800 | 5.6 | 6.2 |
2000 | 5.9 | 6.5 |
2500 | 6.7 | 7.4 |
3000 | 7.5 | 8.3 |
Frequently Asked Questions (FAQ)
1. Why is the LMR400 cable ideal for cellular radio networks?
The LMR400 cable is engineered with a copper clad aluminum inner conductor and a high-velocity 85% foam PE dielectric, which results in exceptional low-loss signal transmission. Its dense braided cable shielding (86% coverage) prevents external interference, making it perfect for the strict performance requirements of modern cellular radio towers.
2. Can this braided cable be used effectively for Cellular In-building Coverage?
Yes, it is highly recommended. For Cellular In-building Coverage, you need a cable that balances low signal loss with routing flexibility. The LMR400 cable offers a minimum bend radius of 25.4mm , allowing for manageable installation through building risers and conduits while maintaining an excellent return loss of ≥20.8 dB across 30~2800MHz.
3. Is your LMR400 cable a direct equivalent to Hansen cable?
Yes. As a professional manufacturer, we produce our LMR400 cable to strict international standards, ensuring it functions as a high-performance, cost-effective alternative to standard Hansen cable. It provides the identical 50±2Ω impedance and rugged environmental durability required for professional RF feeder systems.
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