IEC 61196-8-4:2012

Overview

IEC 61196-8-4:2012 specifies the requirements for 50-141 type semi-flexible coaxial communication cables with solid polytetrafluoroethylene (PTFE) insulation. These cables, a part of the IEC 61196-8 family, are designed for use in microwave, wireless, and other signal transmission equipment operating at frequencies from 500 MHz up to 18 GHz. The standard establishes the detailed specification for cable layout, style, and key characteristics to ensure reliable high-frequency transmission in demanding environments.

This document is to be used together with both IEC 61196-1:2005, which provides the generic specification for coaxial communication cables, and IEC 61196-8:2012, focusing on sectional specifications for semi-flexible cables with PTFE dielectric.

Key Topics

• Cable Construction:

  • Inner conductor options include silver-plated copper or copper-clad steel wire.
  • Solid PTFE dielectric ensures low-loss and stable electrical properties over a wide frequency range.
  • Outer conductor uses a tin-soaked copper wire braid.
  • Sheath materials include FEP, LSZH, or PVC for varying environmental requirements.

• Electrical Performance:

  • Nominal characteristic impedance of 50 ohms.
  • Frequency range: 500 MHz to 18 GHz, supporting applications across microwave and high-frequency wireless systems.
  • Attenuation, return loss, and power rating defined by frequency, with minimum screening attenuation of 100 dB at 1 GHz.
  • High insulation resistance and controlled impedance regularity support consistent signal integrity.
  • Maximum operating voltage: up to 1.9 kV RMS.

• Mechanical and Environmental Properties:

  • Operating temperature ranges from -55°C to +125°C (depending on sheath type).
  • Minimum static and dynamic bending radii specified for installation and operation.
  • High tensile strength and resistance to ageing, bending, and repeated flexing increase cable lifespan in demanding use.

Applications

50-141 type semi-flexible coaxial cables are integral in RF and microwave systems requiring stable electrical performance at high frequencies. Typical applications include:

• Wireless and Microwave Equipment: Reliable transmission of RF and microwave signals in telecom infrastructure, point-to-point radios, and radar systems.
• Signal Transmission Units: Integration into test equipment, measurement instruments, and RF communication modules.
• Aerospace and Defense: Used in airborne and military communication systems due to robust construction and consistent performance under varied environmental conditions.
• Laboratory and Test Environments: Preferred for situations demanding precision signal delivery and flexibility during setup changes.

Related Standards

To ensure comprehensive compliance and optimal performance, IEC 61196-8-4:2012 should be used alongside relevant international standards, including:

• IEC 61196-1:2005: Generic specification for coaxial communication cables covering fundamental definitions and requirements.
• IEC 61196-8:2012: Sectional specification for semi-flexible cables using PTFE dielectric, providing essential background and additional performance parameters.
• IEC 61169-4: Specification for RF coaxial connectors, such as type 7-16, often used with 50-141 type cables for secure, low-loss connections in high-frequency systems.
• IEC 61196-1-115: Test methods for regularity of impedance, ensuring continued conformity to signal transmission requirements.

Summary

IEC 61196-8-4:2012 provides a robust specification for high-performance 50-141 type semi-flexible coaxial cables with solid PTFE insulation, supporting reliable RF and microwave signal transmission. The standard ensures quality, consistency, and safety for modern communication infrastructure and test environments, benefiting manufacturers, users, and system integrators alike. For full compliance, always refer to the latest editions of referenced IEC standards.

Keywords: IEC 61196-8-4, coaxial communication cable, semi-flexible, PTFE insulation, RF cable, microwave signal transmission, 50-141 cable, high-frequency, international standard, cable specification.