M17/128-RG400 | 50Ω | 12.4 GHz | 19-Strand SCCS | Double Braid | -55°C to +200°C

The RG400 coax is the industry benchmark for high-performance flexible coaxial cables. Engineered to survive the most demanding physical and electrical environments, it perfectly balances the need for a wide 12.4 GHz bandwidth with the mechanical resilience required for aviation, defense, and high-end test equipment. Unlike cables that use solid conductors, the RG400 coax utilizes a 19-strand silver-plated copper clad steel (SCCS) inner conductor. This stranded construction provides exceptional resistance to vibration, flex fatigue, and breakage, making it ideal for aircraft avionics, moving radar arrays, and daily-use lab test jumpers. Encased in a dual-layer silver-plated copper braid and a rugged FEP jacket, the RG400 delivers low loss and flawless signal integrity from DC up to 12.4 GHz.

• 19-Strand SCCS Inner Conductor – Provides unmatched flexibility and vibration resistance compared to solid-core cables.

• 12.4 GHz Maximum Frequency – Full broadband performance for X-band, Ku-band, and high-frequency testing.

• Double Silver-Plated Copper Braid (2:SC) – Low transfer impedance and excellent EMI shielding effectiveness.

• FEP Jacket – Resists chemicals, oils, and fuels; rated for continuous operation from -55°C to +200°C.

• 20 mm Minimum Bend Radius – Highly flexible for tight routing in aircraft frames and test racks.

• Low Attenuation – 0.483 dB/m at 1 GHz and 1.901 dB/m at 11 GHz.

• 1900 VMS Maximum Voltage – Suitable for a wide range of transmitter and receiver applications.

• MIL-DTL-17 Qualified – M17/128-RG400 reliability for defense and aerospace.

• RoHS Compliant – Environmentally responsible materials.

• 19-Strand SCCS Conductor – The soft steel core ensures high tensile strength and prevents breakage under severe vibration. The 19 strands provide the flexibility needed for repeated bending, while the silver-plated copper layer ensures excellent high-frequency conductivity.

• PTFE Dielectric – Stable 69.5% velocity of propagation and low loss across a wide temperature range.

• Double Silver-Plated Copper Braid – Two interlocking layers provide maximum shielding against external interference and minimize signal leakage.

• Extruded FEP Jacket – Offers a smooth, low-friction surface, excellent chemical resistance, and survival in extreme temperatures up to 200°C.

The RG400 coax represents the perfect compromise between high-frequency electrical performance and rugged mechanical reliability. In high-vibration environments like fighter jets or mobile radar units, a solid-core cable will eventually fatigue and break. Our 19-strand SCCS conductor solves this problem, offering flex fatigue resistance without significantly compromising high-frequency loss. Furthermore, by utilizing a precision dual-layer silver-plated copper braid, we ensure that the 12.4 GHz bandwidth is protected from electromagnetic interference. Qualified to MIL-DTL-17 (M17/128-RG400), our RG400 is the trusted choice for mission-critical avionics, test bench jumpers, and satellite communications where failure is simply not an option.

• Avionics & Aerospace – Vibration-resistant interconnects for radar warning receivers, GPS antennas, and cockpit systems.

• Radar & Microwave Test Jumpers – Flexible, low-loss cables for daily use on network analyzers and test benches.

• Mili tary Tactical Radios – Reliable 50Ω signal routing in harsh field environments.

• Phased Array Antennas – Flexible interconnects for moving antenna elements.

• Lab & Measurement – High-frequency routing where cables are constantly moved and bent.