IEC 61196-1-119:2012

Coaxial communication cables - Part 1-119: Electrical test methods - RF power rating

IEC 61196-1-119:2012(E) defines the requirements to determine the average power handling capability of a coaxial cable at specified frequencies at ambient temperatures.

General Information

• Status: Published
• Publication Date: 24-Sep-2012
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.120.10 - Coaxial cables. Waveguides
• Technical Committee: SC 46A - Coaxial cables
• Drafting Committee: WG 3 - TC 46/SC 46A/WG 3
• Current Stage: DELPUB - Deleted Publication
• Start Date: 05-Dec-2018
• Completion Date: 12-May-2020

Relations

• Revised: IEC 61196-1-119:2020 - Coaxial communication cables - Part 1-119: Electrical test methods - RF average power rating
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61196-1-119 ®
Edition 1.0 2012-09
INTERNATIONAL
STANDARD
Coaxial communication cables –
Part 1-119: Electrical test methods – RF power rating

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IEC 61196-1-119 ®
Edition 1.0 2012-09
INTERNATIONAL
STANDARD
Coaxial communication cables –

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

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
K
ICS 33.120.10 ISBN 978-2-83220-391-0

– 2 – 61196-1-119 © IEC:2012(E)

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 Temperature test . 7
6.1 Procedure: General considerations . 7
6.2 Procedure: RF test – Method A . 7
6.3 Procedure: Low frequency power AC test – Method B. 8
7 Attenuation test. 8
7.1 Conduct attenuation test . 8
7.2 Calculate A and B coefficients – Method B . 8
7.3 Calculate the A and A coefficients – Method B . 9
i o
8 Power calculation . 9
8.1 Determined from AC test – Method B . 9
8.2 Determined from RF test – Method A . 10
8.3 Adjustment to other frequencies . 10
9 Test report . 10
10 Requirements . 10

61196-1-119 © IEC:2012(E) – 3 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
COAXIAL COMMUNICATION CABLES –

Part 1-119: Electrical test methods – RF 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, R.F. connectors, R.F. and
microwave passive components and accessories.
The text of this standard is based on the following documents:
FDIS Report on voting
46A/1094/FDIS 46A/1116/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – 61196-1-119 © IEC:2012(E)

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 publication will remain unchanged until the

stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to

the specific publication. At this date, the publication will be

• reconfirmed,
• withdrawn,
• replaced by a revised edition, or

• amended.
A bilingual version of this publication may be issued at a later date.

61196-1-119 © IEC:2012(E) – 5 –

COAXIAL COMMUNICATION CABLES –

Part 1-119: Electrical test methods – RF 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, in whole or in part, are normatively referenced in this document and
are indispensable for its application. 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, as well as
the following apply.
3.1
RF power rating
maximum average input power that a cable can continuously handle when terminated in its
characteristic impedance at a reference ambient temperature and RF frequency
Note 1 to entry: RF 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
 
dB
A attenuation constant associated with the conductors  
 
m⋅ MHz
 
 
dB
A attenuation constant of inner conductor  
i
 
m⋅ MHz
 
– 6 – 61196-1-119 © IEC:2012(E)

 dB 
 
A attenuation constant of outer conductor
o  
m⋅ MHz
 
dB
 
B attenuation constant for the dielectric material  
m⋅MHz
 
a mean outer diameter of inner conductor (mm)

Corrugated: Mean = (peak + root)/2

Smooth wall = (max + min)/2
b mean inner diameter of outer conductor (mm)

Corrugated: Mean = (peak + root)/2
Smooth wall = (max + min)/2
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
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
i
C = 1 for smooth wall
i
P RF input power (W)
in
P rated RF power (W) at frequency f
r
P rated RF power (W) at frequency f

rf1 1
P rated RF power (W) at frequency f

rf2 2
P power dissipated in inner conductor (W/m)
i
P power dissipated in outer conductor (W/m)
o
σ conductivity of inner conductor (relative to copper)
i
σ conductivity of outer conductor (relative to copper)
o
γ temperature coefficient of resistance for inner conductor
i
γ temperature coefficient of resistance for outer conductor
o
α attenuation of cable, at frequency f (dB/100 m)
c
α attenuation of cable, at frequency f (dB/100 m)

f1 1
α attenuation of cable, at frequency f (dB/100 m)

f2 2
α attenuation of inner conductor, at frequency f (dB/100 m)

i
α attenuation of outer conductor, at frequency f (dB/100 m)
o
T inner conductor temperature (°C)
i
T outer conductor temperature (°C)
o
T test ambient temperature (°C)
a
T inner conductor temperature rise (°C)
ri
T outer conductor temperature rise (°C)
ro
R maximum rated ambient temperature (°C)
T
61196-1-119 © IEC:2012(E) – 7 –

5 Methodology
5.1 Method A
If a suitable RF power source is available, it is possible to determine th
...