IEC 61196-1-119:2020

IEC 61196-1-119 ®
Edition 2.0 2020-05
INTERNATIONAL
STANDARD
Coaxial communication cables –
Part 1-119: Electrical test methods – RF average power rating
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IEC 61196-1-119 ®
Edition 2.0 2020-05
INTERNATIONAL
STANDARD
Coaxial communication cables –

Part 1-119: Electrical test methods – RF average power rating

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.120.10 ISBN 978-2-8322-8067-6

– 2 – IEC 61196-1-119:2020 © IEC 2020
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Symbols . 5
5 Methodology . 7
5.1 Method A . 7
5.2 Method B . 7
6 Test general considerations . 7
6.1 Sample preparation . 7
6.2 Surrounding condition . 7
6.3 Temperature test . 7
6.4 Test equipment . 7
7 Procedure . 8
7.1 RF test – Method A . 8
7.2 Low frequency power AC test – Method B . 9
7.3 Adjustment to other frequencies . 10
8 Test report . 11
9 Requirements . 11
Annex A (informative) Determination method of thermal time constant . 12
A.1 General . 12
A.2 Determination method . 12
Bibliography . 14

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COAXIAL COMMUNICATION CABLES –

Part 1-119: Electrical test methods – RF average power rating

FOREWORD
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International Standard IEC 61196-1-119 has been prepared by subcommittee 46A: Coaxial
cables, of IEC technical committee 46: Cables, wires, waveguides, RF connectors, RF and
microwave passive components and accessories.
This second edition cancels and replaces the first edition, published in 2012. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) title was changed from: RF power rating to: RF average power rating;
b) a test method to determine sufficient duration is included as Annex A;
c) the equations used for calculating cable coefficients and RF average power rating are
corrected;
d) the clauses and subclauses are rearranged.

– 4 – IEC 61196-1-119:2020 © IEC 2020
The text of this International Standard is based on the following documents:
FDIS Report on voting
46A/1401/FDIS 46A/1408/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 61196 series published under the general title Coaxial
communication cables can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
COAXIAL COMMUNICATION CABLES –

Part 1-119: Electrical test methods – RF average power rating

1 Scope
This part of IEC 61196 defines the requirements to determine the average power handling
capability of a coaxial cable at specified frequencies at ambient temperatures.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 61196-1, Coaxial communication cables – Part 1: Generic specification – General,
definitions and requirements
IEC 61196-1-113, Coaxial communication cables – Part 1-113: Electrical test methods – Test
for attenuation constant
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61196-1 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
RF average power rating
maximum average input power that a cable can continuously handle when terminated in its
characteristic impedance at a reference ambient temperature (usually 40 °C) and RF
frequency
Note 1 to entry: RF average power rating is determined by the power level at which the temperature at any
location in the cable does not exceed the allowable maximum temperature rating of the materials used in the
cable’s construction.
Note 2 to entry: Typically, the inner conductor temperature determines the maximum operating temperature.
Note 3 to entry: The test RF signal is a pure sinusoidal, without any modulation.
4 Symbols
For the purposes of this document, the following symbols apply.
K thermal constant of the insulation (W/(°C·m))
i
K thermal constant of outer sheath (W/(°C·m))
o
– 6 – IEC 61196-1-119:2020 © IEC 2020
 dB 
 
attenuation constant associated with the conductors
A
 
m⋅ MHz
 
 dB 
 
attenuation constant of inner conductor
A
 
i
m⋅ MHz
 
 dB 
 
attenuation constant of outer conductor
A
 
o
m⋅ MHz
 
 dB 
attenuation constant for the dielectric material  
B
m⋅MHz
 
a mean outer diameter of inner conductor (mm)
Sine shape corrugated: Mean = (peak + root)/2
Other shape corrugated: Mean shall be specified by the manufacturer.
Smooth wall = outer diameter
Wire = outer diameter
b mean inner diameter of outer conductor (mm)
Sine shape corrugated: Mean = (peak + root)/2
Other shape corrugated: Mean shall be specified by the manufacturer.
Smooth wall = inner diameter
C corrugation factor of inner conductor:
i
Ratio of the distance that compares the non-corrugated (conversion of corrugated

length to an equivalent smooth wall length) to the cable corrugated length.
C > 1 for corrugated cable
i
C = 1 for smooth wall or wire
i
C corrugation factor of outer conductor
o
Ratio of the distance that compares the non-corrugated (conversion of corrugated

length to an equivalent smooth wall length) to the cable corrugated length.
C > 1 for corrugated cable
o
C = 1 for smooth wall
o
P RF input powe
...