Ultra Low Loss 40 GHz Precision Test Coaxial Cable with PFA Jacket – Model CFS400B

High-Precision Coaxial Cable for Consistent RF Measurement Accuracy

The CFS400 ultra-low-loss precision test coaxial cable provides exceptional phase and amplitude stability for high-frequency testing environments. With a 50 Ω impedance and a stable operating range up to 40 GHz, it ensures low insertion loss and excellent repeatability for precision RF measurement, calibration, and signal verification applications. Fully REACH and RoHS compliant, it reflects Mechanc’s commitment to both performance and environmental responsibility.

Optimized Electrical Design for Phase and Amplitude Stability

The CFS400 coaxial cable is engineered for precision with a solid silver-plated copper inner conductor and LD-PTFE dielectric, achieving excellent impedance uniformity and electrical stability. Phase deviation remains within ±3° @ 18 GHz and ±5° @ 26.5 GHz, while amplitude variation is limited to ≤ ±0.1 dB @ 18 GHz. Attenuation is exceptionally low—just 0.36 dB/m @ 1 GHz and 2.35 dB/m @ 40 GHz—ensuring accurate and repeatable results even in demanding RF and microwave setups. Phase stability over temperature remains below 750 PPM from –55 °C to +85 °C, supporting reliable long-term performance in varying conditions.

High Mechanical Strength and Shielding Integrity

With its precision-built outer structure, the CFS400 cable combines durability and mechanical resilience without compromising electrical performance. Dual silver-plated copper shields provide > 90 dB shielding effectiveness, effectively minimizing external interference and preserving signal integrity during frequent handling. The cable’s 4.00 mm PFA jacket offers outstanding flexibility, abrasion resistance, and high thermal tolerance (–55 °C to +165 °C), while maintaining low weight at only 40 g/m. Its single-bend radius of 20 mm and repeated-bend radius of 40 mm make it suitable for both bench-top and automated test environments.

Available Variant for Enhanced Performance

For applications requiring even lower attenuation and improved shielding efficiency, Mechanc offers an enhanced version of this model: the CFS400B ultra-low-loss precision test coaxial cable. It delivers optimized mechanical durability and refined phase control while maintaining the same 50 Ω impedance and high-frequency capability.

Applications Requiring Repeatable High-Frequency Performance

The CFS400 ultra-low-loss coaxial cable is ideal for vector network analyzer (VNA) calibration, 5G signal analysis, radar verification, and microwave testing systems requiring low-loss, high-phase-stability connections. Its balance of mechanical robustness, shielding efficiency, and long-term electrical precision makes it an excellent choice for laboratory and production use. For other precision-grade options, explore the Precision Test Coaxial Cable Series by Mechanc.

Manufactured by Mechanc Shanghai Information Technology Co., Ltd., the CFS400 ultra-low-loss precision test coaxial cable combines long-term phase stability, low insertion loss, and verified REACH and RoHS compliance to deliver metrology-grade reliability for advanced RF testing environments.

Explore the full Ultra-Low-Loss CFS Series.