26.5 GHz Flexible High-Temperature Phase-Stable RF Coaxial Cable – CFU540

Low-Loss 26.5 GHz Flexible Cable for Temperature-Exposed RF Systems

The CFU540 RF coaxial cable provides a characterized 26.5 GHz cable platform for phase-sensitive instrumentation and related microwave interconnects. Within the CFU540 raw coaxial cable configuration, the CFU series combines flexible routing with a construction selected for phase-sensitive operation in equipment exposed to changing thermal conditions. Quantitative comparison of the CFU540 coaxial cable with other Flexible Phase-Stable Coaxial Cables models should be based on the endpoint loss, power, conductor, and mechanical data below.

Operating-Band Data for RF Engineers

The maximum-frequency operating point is characterized by 1.345 dB/m loss and 0.190 kW power capability at 26.5 GHz. The conductor system uses silver plated copper at 1.40 mm diameter and provides a specified velocity of propagation of 83%. For the CFU540 RF cable, the 83% propagation value provides the basis for estimating electrical delay and timing skew over the required assembly length. Together, these values support link-loss, electrical-delay, and power-margin calculations for the CFU540 RF coaxial cable at the intended operating frequency.

Longer Thermal Routes Requiring Lower Attenuation

The documented performance envelope is relevant to environmental test equipment and temperature-cycled electronics, where cable loss and routing geometry must be evaluated together. For the CFU540 coaxial cable, the result is a product-specific RF interconnect option supported by the electrical and mechanical data required for design review. When alternatives to the CFU540 raw coaxial cable are required, additional construction and performance options are available in the Flexible Coaxial Cables portfolio.

Installation Planning in Heat-Exposed Systems

The 4.65 mm outside diameter requires a minimum static bend radius of 27.00 mm and 54.00 mm minimum dynamic bend radius, with operation specified across -55 to +125 °C. During installation of the CFU540 raw coaxial cable, routing should remain within the specified bend geometry throughout forming, connectorization, and installation. The 4.65 mm cross-section of the CFU540 RF cable prioritizes loss and power performance over minimum routing volume. Compliance with these constraints helps protect impedance continuity and repeatability at the cable-to-connector transition associated with the CFU540 RF coaxial cable.

Mechanc Shanghai Information Technology Co., Ltd. documents the CFU540 RF coaxial cable with product-specific parameters so that RF engineers can evaluate the interconnect against system bandwidth, loss budget, power, thermal, and packaging requirements. Within the product portfolio, this configuration is designated as the CFU540 raw coax.