Product Overview

Phase Stable Cable

Aptiv Interconnect's Phase Stable Cables are high-performance coaxial cables engineered for applications demanding unwavering electrical length and phase consistency. Designed to resist variations caused by temperature changes, mechanical stress, and long-term use, these cables are critical for high-frequency RF and microwave systems where even minor phase shifts can compromise performance. Our meticulous selection of dielectric materials, optimized conductor geometries, and advanced shielding constructions ensure precise timing, accurate signal summation, and repeatable measurements, making them indispensable for your most demanding critical systems.

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Features and Benefits

  • Minimal Phase Change with Temperature: Stable performance across varying thermal environments due to low coefficient of phase change.
  • Excellent Phase Stability with Flexure: Consistent phase even when bent, ideal for dynamic applications.
  • Enhanced Measurement Accuracy & Repeatability: Provides a stable baseline for precise test and measurement.
  • Superior Signal Coherence: Prevents destructive interference and maximizes signal strength for multi-signal applications.
  • Reduced System Calibration Needs: Minimizes frequent recalibration, saving time and resources.
  • Low Loss & Good VSWR: Efficient power transfer alongside phase stability.

Specifications, Parts, and Filters

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Impedance
Typically 50 Ohms.
Frequency Range
Wideband performance, ranging from DC up to 18 GHz, 26.5 GHz, 40 GHz, or even higher, depending on the specific cable series and diameter.
Phase Stability vs. Temperature
A key performance metric, typically expressed in parts per million per degree Celsius (ppm/°C) or degrees per unit length over a temperature range (e.g., ± 50 ppm/°C over -55°C to +125°C, or ± 2°/ft @ 18 GHz over specified range).
Phase Stability vs. Flexure
Quantified as the maximum phase change observed when the cable is bent to a specified radius at a given frequency. This is often extremely low (e.g., ± 2° @ 18 GHz for a 360° bend over a specific diameter).
Attenuation (Insertion Loss)
Low for optimal signal transmission, though often slightly higher than rigid cables of comparable diameter due to the engineering required for flexibility and phase stability.
Velocity of Propagation (VP)
High, typically between 70% and 85%, consistent for stable signal timing.
VSWR (Voltage Standing Wave Ratio)
Excellent, ensuring minimal signal reflections and efficient power transfer.
Shielding Effectiveness
High, typically >90 dB, to protect the stable signal from external interference.
Capacitance
Consistent and precise, contributing to stable impedance.

Inner Conductor
Solid or multi-strand silver-plated copper
Dielectric
Proprietary Phase Stable Dynacore
Outer Conductors/Shielding
Multiple layers (foil, braid, or helical wrap) for flexibility and stable shielding.
Jacket
Flexible, durable FEPor polyurethane for environmental protection.
Outer Diameter
Various diameters for performance, flexibility, and power.
Minimum Bend Radius
Engineered for phase stability at tight bends.
Flex Life
High number of flex cycles without degradation.

Temperature Range
Wide operating range (-5°C/-65°C to +85°C/+125°C) with phase stability.
Thermal Shock
Resistant to rapid temperature fluctuations.
Vibration & Shock
Withstands significant vibration and shock.
Moisture Resistance
Robust jackets and sealed constructions for humidity and moisture.
UV Resistance
UV stabilizers for outdoor exposure.
Chemical Resistance
Jacket materials resistant to oils, fuels, and cleaning agents.
Space Qualification
Specialized versions for vacuum stability and radiation resistance.

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