Ultra-Low Loss Signal Transmission with LMR400 & RG400
Our N-Male to N-Female coaxial extension cables are engineered for users who refuse to compromise on signal integrity. Available in both LMR400 and RG400 specifications, these cables offer the ultimate solution for long-distance RF transmission. LMR400 is the industry standard for low-loss performance, while the RG400 variant provides superior flexibility and high-power handling with its double-shielded silver-plated construction. Both options ensure a consistent 50 Ohm impedance, minimizing signal attenuation and maximizing the range of your wireless system.
Heavy-Duty N-Type Connectors for Maximum Durability
This assembly features precision-machined N-Male (Plug) and N-Female (Jack) connectors.
N-Male Side: Features a knurled grip for secure manual tightening and a gold-plated center pin for optimal conductivity.
N-Female Side: Designed as a high-strength bulkhead or extension port with a precision-fit socket.
The connectors are finished with high-quality nickel plating to resist corrosion, ensuring a "fit-and-forget" installation even in humid or saline environments.
Weatherproof Construction for Indoor & Outdoor Use
Built to withstand the elements, these cables utilize a UV-resistant, waterproof jacket (PE for LMR400 or PTFE for RG400). This makes them the perfect choice for outdoor antenna extensions. Whether you are routing cable through a building conduit or mounting it on a telecommunications tower, the rugged outer layer protects the delicate internal shielding from moisture, physical abrasion, and sunlight degradation.
Versatile Application Scenarios: From 5G to Satellite
The LMR400/RG400 N-Type extension is a critical component for high-stakes wireless infrastructure:
4G/5G & LTE Networking: Extending the reach between an outdoor MIMO antenna and an indoor cellular booster.
Helium & LoRaWAN: Connecting IoT gateways (like Bobcat or Rak miners) to high-gain fiberglass antennas for maximum coverage.
WiFi Signal Expansion: Bridging the gap between a high-power wireless access point and a directional panel antenna.
Marine & Aviation: Reliable communication links for GPS, radar, and VHF radio systems on ships or aircraft.
Optimized Synergy with Peripheral RF Products
To achieve the best results, this extension cable is often used in conjunction with several essential RF components:
Lightning Surge Arrestors: Install an N-type surge protector between this cable and your equipment to protect against static discharge.
Fiberglass Omni-Antennas: The LMR400 cable is the preferred choice for connecting to high-dBi antennas to ensure the gain isn't lost in the wire.
RF Pigtails (SMA to N): Use this heavy-duty extension cable as your primary run, then use a smaller RG316 or RG142 pigtail to convert the connection to an SMA port on your router.
Technical Specifications & Comparative Data
| Feature | LMR400 Specification | RG400 Specification |
| Connector Type | N-Male to N-Female | N-Male to N-Female |
| Impedance | 50Ω | 50Ω |
| Shielding | Aluminum Foil + Tinned Copper Braid | Double Silver-Plated Braid |
| Jacket Material | UV-Resistant PE (Black) | High-Temp PTFE (Tan/Brown) |
| Frequency Range | DC to 6 GHz | DC to 12.4 GHz |
| Best For | Long outdoor runs / Lowest Loss | High Power / High Temperature / Flex |
Why Choose KEESUN Professional Grade Assemblies?
We understand that your network's performance is only as good as its weakest link. Every LMR400/RG400 extension cable we produce undergoes a strict 100% continuity and VSWR (Voltage Standing Wave Ratio) test. By choosing our high-density shielded cables, you are investing in a future-proof RF solution that delivers crystal-clear signal quality for years to come.
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