Small Diameter Flexible RF Cable Assemblies

Amphenol Military & Aerospace’s SV Microwave small‑diameter flexible RF cable assemblies deliver precise 50 Ω connectivity in applications requiring high frequency and confined routing. These assemblies combine miniature coaxial geometries with rugged low‑VSWR performance engineered for radar, SATCOM, EW, avionics, and high‑speed communication systems.

Cable Diameter Variants

• Ø 0.047 in Standard Flexible: the smallest option offering maximum frequency range and flexibility for complex layouts.
• Ø 0.047 in SuperFlex: employs a stranded center conductor and polyurethane jacket for ultra‑tight bend radii down to approximately 0.0625 in.
• Ø 0.085 in General Purpose: balances insertion loss and mechanical pliability for common assembly use.
• Ø 0.087 in Low Loss: includes a molded boot and improved phase stability over flexing for extended‑length runs.

Connector Compatibility

Assemblies can be terminated with SMA, 2.92 mm, 2.4 mm, 1.85 mm, SMP, and SMPM precision connectors depending on required frequency range and packaging density. Each maintains broadband impedance control with minimized solder wicking to preserve cable flexibility close to the ferrule.

Hybrid and Specialty Options

SV Microwave’s ConvergeRF hybrid technology supports direct Ø 0.047 in to Ø 0.085 in transitions without intermediate interfaces, reducing insertion loss while maintaining agile routing near the connector end. This precision coaxial transition is suited for mixed‑size feed structures within dense electronics.

Applications

• Compact radar and electronic warfare modules where low profile and phase stability are essential
• SATCOM and telecommunication payloads requiring broad frequency coverage
• Avionics, aerospace, and defense systems needing lightweight, flexible harnessing
• Laboratory and instrumentation setups demanding repeatable high‑frequency performance

Selection Guidance

Engineers should choose the smallest cable diameter compatible with mechanical routing limits to minimize mass and bend radius, balancing higher insertion loss of finer cables against frequency target. The Ø 0.047 in SuperFlex variant is recommended where mechanical maneuverability outweighs attenuation, while Ø 0.087 in Low Loss types support longer runs and improved phase stability. Additional custom configurations can be specified using SV Microwave’s online Cable Builder tool for precise length, interface, and environmental requirements.