IEC TR 62152:2009 - Overview
IEC TR 62152:2009 is a Technical Report that establishes a common vocabulary and conceptual bridge for describing the transmission properties of two-ports (quadripoles). It clarifies fundamental terms and definitions used worldwide for cascaded two-ports and links the classical quadripole theory with the scattering matrix (S‑matrix) presentation based on incident and reflected square‑root‑of‑power waves. This second edition (2009) replaces the 2004 edition and adds technical improvements and important terms (some supplied with German equivalents).
Key topics
- Terms and definitions: precise definitions for key quantities such as complex operational attenuation, complex operational insertion loss, image attenuation and related symbols and units.
- Transfer functions: presentation of operational, image and insertion transfer functions for a two‑port and their roles in cascade analysis.
- Complex attenuation/loss: definitions and interpretation of complex attenuation (magnitude in dB and phase in radians) for operational, image and insertion cases.
- Power‑wave formalism: normalized voltage waves and square‑root‑of‑power waves, linking S‑matrix parameters to classical two‑port (quadripole) quantities.
- Measurement context: how reference impedances, matched conditions and terminations affect measured insertion loss and attenuation (including insertion loss deviation).
- Annexes: normative material covering normalized waves, image transmission parameters, two‑port theory and transmission engineering concepts with illustrative figures (Smith chart, reflection, matching, etc.).
Practical applications
- Provides a single reference for engineers and test laboratories to consistently describe and measure transmission behaviour of components inserted into cascaded systems.
- Useful for RF/microwave engineers, telecommunications system designers, cable and connector manufacturers, and conformity assessment bodies who need uniform terminology for:
- Specifying insertion loss and return loss,
- Converting between scattering parameters and classical two‑port parameters,
- Designing and testing matched interfaces and cascade chains,
- Interpreting measurement results where reference impedances or terminations differ.
- Supports standardization of test procedures and interchange of measurement data between vendors and labs.
Related standards
- IEC 60050‑726 - International Electrotechnical Vocabulary: Transmission lines and waveguides
- IEC 61156‑1 - Multicore and symmetrical pair/quad cables for digital communications - Part 1
- IEC/TR 61156‑1‑2 - Electrical transmission characteristics and test methods for symmetrical pair/quad cables
Keywords: IEC TR 62152, two‑port, quadripole, transmission properties, scattering matrix, transfer functions, complex attenuation, insertion loss, power waves, scattering parameters.