Overview
IEC 60050-705:1995/AMD5:2020 is the fifth amendment to the International Electrotechnical Vocabulary (IEV) focusing on Part 705: Radio Wave Propagation. Published by the International Electrotechnical Commission (IEC), this amendment serves as an update to the terminology and definitions used worldwide in the field of radio wave propagation. It ensures consistency and clarity across international standards, technical documentation, and scientific communication concerning electromagnetic waves.
This amendment updates existing entries, replaces obsolete terms, and harmonizes vocabulary with related sections in the IEV. IEC 60050-705 is essential for professionals dealing with electromagnetic field theory, radio communication, signal propagation, and related technologies.
Key Topics
The amendment provides precise definitions of fundamental concepts in radio wave propagation, including:
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Electromagnetic Field
Definitions related to the nature and properties of electromagnetic fields, referencing IEV 121-11-61 for detailed descriptions.
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Maxwell's Equations
A foundational set of equations describing electromagnetic phenomena (IEV 121-11-62).
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Electromagnetic Wave
Clarifies the concept with reference to standard IEV descriptions (IEV 121-11-63).
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Polarization of Electromagnetic Waves
Detailed terminology including:
- Polarization (direction of electric field vector at a point)
- Elliptical polarization (electric flux vector describes an ellipse)
- Circular polarization (electric field vector endpoint traces a fixed circle)
- Polarization ellipse and the plane of polarization
- Orthogonal polarization (deprecated term: cross-polarization)
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Power Flux Density
Also known as radiant flux density, describing radiant power passing through a surface element normal to propagation direction.
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Optical Path Length
The phase path length of an electromagnetic wave between two points, related to the refractive index of the medium.
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Physical Constants
Including electric constant (permittivity of vacuum), absolute and relative permittivity, magnetic constant (permeability of vacuum), and related parameters.
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Refraction of Electromagnetic Waves
Definition and context for wave refraction phenomena.
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Brewster’s Angle
The specific incidence angle at which reflectance is zero for certain polarization states on a boundary between two media.
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Guided Electromagnetic Wave
Waves confined to propagate between or near surfaces due to variations in medium properties.
Applications
The terminology and definitions provided by IEC 60050-705:1995/AMD5:2020 are crucial for various practical applications:
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Radio Communication Systems:
Establishing clear, standardized language for antenna design, signal propagation analysis, and interference mitigation.
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Electromagnetic Field Analysis:
Facilitating consistent communication in the development of RF components and electromagnetic compatibility (EMC) assessments.
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Optical and Photonic Engineering:
Applying concepts like optical path length and polarization in fiber optics and laser systems.
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Wireless Network Planning:
Employing definitions of polarization and power flux density to optimize signal coverage and propagation models.
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Academic and Research Fields:
Serving as a reference vocabulary for electromagnetic wave propagation in physics, electrical engineering, and telecommunications education.
Related Standards
IEC 60050-705:1995/AMD5:2020 is part of a broader family of IEC standards related to electrotechnical vocabulary and electromagnetic phenomena, including but not limited to:
These standards work in tandem to provide a comprehensive terminology framework for electrical, electronic, and communication engineers worldwide.
Keywords: IEC 60050-705, International Electrotechnical Vocabulary, radio wave propagation, electromagnetic wave, polarization, power flux density, optical path length, Brewster's angle, electromagnetic field, guided wave, IEC amendment, electrotechnical standards.