IEC 61196-4 in IEC Standards
COAXIAL COMMUNICATION CABLES –Part 4: Sectional specification for radiating cables
Revision History of IEC 61196-4
International Standard IEC 61196-4 has been prepared by subcommittee 46a: Coaxial cables,
of IEC technical committee 46: Cables, wires, waveguides, r.f. connectors, r.f. and microwave
passive components and accessories.
This second edition of IEC 61196-4 cancels and replaces the first edition published in 1995. This edition constitutes a technical revision.
The main changes with respect to the previous edition are as follows:
- a) Frequency limitation removed from the scope;
- b) New requirement for performance in fire;
- c) Changes to the procedure, measurement and evaluation of the attenuation constant
The Scope of IEC 61196-4
This part of IEC 61196 covers the requirements for flexible and semi-flexible radiating coaxial
communication cables. It specifies preferred ratings and characteristics for radiating cables
and enables selection of the appropriate tests and performance levels from the generic specification for inclusion in the detail specification.
The coupling strength between the cable and the mobile device depends on the actual situation, which means at least the following factors needs to be taken into consideration.
construction of the cable
|orientation of antenna|
|distance of the mobile antenna from the cable|
|type of antenna|
|nature of ambient atmosphere|
|operating frequency range|
|manner of installation of the cable|
|shape, material and size of surrounding buildings|
Explanation of Radiating (coaxial) Cables in IEC 61196-4
coaxial communication cables with outer conductors that are intentionally not completely
closed, so that part of the energy transmitted or received through the cable is coupled by the transmission system formed by the outer conductor of the cable and the external environment.
Radiant cables can be used to establish a radio connection between fixed stations attached to one end of radiant cable and a mobile stations within the transmitting/receiving range of the cable. They are more suitable for use in tunnels or other installations where conventional radio transmission is unsatisfactory or even impossible.
Radiating cables may be classed according to Iongitudinal loss, coupling loss and performance in fire.
Information to be Included in Detail Specification in IEC 61196-4
Cable constructional details.
Cable outline drawing.
Characteristics to be tested.
Test procedures to be used.
|Requirements||attenuation constant versus frequency|
|coupling loss versus frequency (a c50 , a c95 )|
|type of fire test|
Packaging Requirements in IEC 61196-4
Packaging requirements shall be left to the discretion of the manufacturer of the radio-
frequency cable unless specific packaging requirements are incorporated in the contract or