IEC 61169-26:2013

Overview

IEC 61169-26:2013 is an international standard published by the International Electrotechnical Commission (IEC) that establishes a sectional specification for TNCA series radio-frequency (RF) coaxial connectors. These connectors have a characteristic impedance of 50 ohms, feature threaded coupling, and support an operating frequency up to 18 GHz. The standard defines the preparation rules for detailed specifications, mating face dimensions, gauge details, test procedures, and quality assessments specific to TNCA connectors. This standard is integral in ensuring connector performance, compatibility, and reliability in various high-frequency applications.

Key Topics

• Scope and Purpose
  IEC 61169-26:2013 applies to TNCA series RF coaxial connectors, which are designed for wireless communication, instrumentation, antenna systems, radar, test and measurement equipment, and other RF applications. It covers the connectors’ mechanical dimensions, electrical characteristics, and quality assurance protocols.

• Connector Characteristics

  • Characteristic impedance: 50 Ω
  • Coupling mechanism: Threaded coupling
  • Frequency range: Up to 18 GHz
  • Compatibility: TNCA connectors are designed to be compatible with standard TNC connectors (IEC 60169-17 and IEC 60169-26) under certain conditions, though electrical performances are only guaranteed with TNCA-to-TNCA mating.

• Mechanical Specifications
  The standard prescribes critical mechanical dimensions for connectors with pin-centre and socket-centre contacts. Measurement grades are defined to ensure precision:

  • General connector dimensions (Grade 2)
  • Standard test connector dimensions (Grade 0)
    Gauging procedures and acceptance criteria are included to verify conformity.

• Quality Assessment and Testing
  Includes guidelines for test schedules, inspection requirements, and procedures for acceptance and periodic tests to ensure connector integrity and performance. These tests are aligned with IEC 61169-1 and IEC 60068-1 environmental testing standards.

• Detail Specification Preparation
  The standard guides the preparation of detailed technical specifications covering identification, performance characteristics, marking, ordering information, and test selection for the TNCA connectors.

Applications

The TNCA connectors standardized by IEC 61169-26:2013 are widely used in fields requiring high-frequency RF connectivity with reliable mechanical and electrical performance, such as:

• Wireless Communications – Connecting antennas, RF transceivers, and signal processing equipment.
• Instrumentation and Measurement – High-precision test connectors for laboratory and field measurement instruments.
• Radar Systems – Interfaces in radar communication and detection hardware.
• Antenna Systems – Ensuring secure and low-loss connections in antenna feed lines and arrays.
• RF and Microwave Components – Integrating with micro-strip lines and cables in diverse passive and active RF systems.

TNCA connectors are specifically recommended for frequencies above 11 GHz, enhancing performance in advanced RF and microwave applications.

Related Standards

• IEC 61169-1:1992 – Generic specification for radio-frequency connectors, providing general requirements and measurement methods applicable to TNCA connectors.
• IEC 60169-17 & IEC 60169-26 – Specifications for TNC series connectors with which TNCA connectors share some compatibility.
• IEC 60068-1 – Environmental testing guidelines referenced for climatic and mechanical robustness tests.
• IEC 61169 Series – The broader family of standards covering various RF connector types and categories.

Practical Value

Adopting IEC 61169-26 ensures that TNCA series connectors meet internationally recognized mechanical and electrical standards for 50-ohm RF coaxial interfaces up to 18 GHz. This standard enables manufacturers and users to:

• Achieve consistent product quality and interchangeability.
• Facilitate reliable mating and coupling with minimal signal degradation.
• Guide the development and testing of TNCA connectors to meet rigorous industrial and commercial needs.
• Support global interoperability in telecommunications, instrumentation, and radar industries.

By following IEC 61169-26, engineers and designers benefit from best practices in connector specification, testing, and quality assurance-key factors for high-performance RF system reliability.