IEC 62153-4-7:2021

Metallic cables and other passive components test methods - Part 4-7: Electromagnetic compatibility (EMC) -Test method for measuring of transfer impedance ZT and screening attenuation aS or coupling attenuation aC of connectors and assemblies - Triaxial tube in tube method

IEC 62153-4-7:2021

Name:IEC 62153-4-7:2021   Standard name:Metallic cables and other passive components test methods - Part 4-7: Electromagnetic compatibility (EMC) -Test method for measuring of transfer impedance ZT and screening attenuation aS or coupling attenuation aC of connectors and assemblies - Triaxial tube in tube method
Standard number:IEC 62153-4-7:2021   language:English language
Release Date:22-Jul-2021   technical committee:TC 46 - Cables, wires, waveguides, RF connectors, RF and microwave passive components and accessories
Drafting committee:WG 5 - TC 46/WG 5   ICS number:33.100.10 - Emission

IEC 62153-4-7
Edition 3.0 2021-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Metallic communication cables and other passive components test methods –
Part 4-7: Electromagnetic compatibility (EMC) – Test method for measuring
of transfer impedance Z and screening attenuation a or coupling attenuation
T S
a of connectors and assemblies up to and above 3 GHz – Triaxial tube in tube
C
method




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IEC 62153-4-7
Edition 3.0 2021-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Metallic communication cables and other passive components test methods –
Part 4-7: Electromagnetic compatibility (EMC) – Test method for measuring
of transfer impedance Z and screening attenuation a or coupling attenuation
T S
a of connectors and assemblies up to and above 3 GHz – Triaxial tube in tube
C
method
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.100.10; 33.120.10 ISBN 978-2-8322-5213-0
– 2 – IEC 62153-4-7:2021 RLV © IEC 2021
CONTENTS
FOREWORD . 6
INTRODUCTION . 9
1 Scope . 10
2 Normative references. 10
3 Terms and definitions . 11
4 Physical background . 13
5 Principle of the test methods . 13
5.1 General . 13
5.2 Transfer impedance . 14
5.3 Screening attenuation . 14
5.4 Coupling attenuation . 15
6 Test procedure . 16
6.1 General . 16
6.2 Tube in tube procedure . 16
6.3 Test equipment . 17
6.4 Calibration procedure . 18
6.5 Connection between extension tube and device under test . 18
6.6 Dynamic range respectively noise floor . 19
6.7 Impedance matching . 19
6.8 Influence of adapters . 20
7 Sample preparation . 20
7.1 Coaxial connector or device . 20
7.2 Balanced or multiconductor device . 20
7.3 Cable assembly . 22
8 Measurement of transfer impedance . 22
8.1 General . 22
8.2 Principle block diagram of transfer impedance . 22
8.3 Measuring procedure – Influence of connecting cables . 23
8.4 Measuring . 23
8.5 Evaluation of test results . 23
8.6 Test report . 24
9 Screening attenuation . 24
9.1 General . 24
9.2 Impedance matching . 24
9.2.1 General . 24
9.2.2 Evaluation of test results with matched conditions . 25
9.2.3 Measuring with mismatch . 26
9.2.4 Evaluation of test results . 26
9.3 Test report . 26
10 Coupling attenuation . 27
10.1 General . 27
10.2 Procedure for testing connectors . 27
10.3 Procedure for testing cable assemblies . 28
10.4 Balunless procedure .
10.4 Expression of results Evaluation of test results when using a balun . 29

10.5 Evaluation of test results when using a multiport VNA . 30
10.6 Test report . 30
Annex A (normative) Determination of the impedance of the inner circuit . 33
Annex B (informative) Example of a self-made impedance matching adapter . 34
Annex C (informative) Measurements of the screening effectiveness of connectors
and cable assemblies . 36
C.1 General . 36
C.2 Physical basics . 36
C.2.1 General coupling equation . 36
C.2.2 Coupling transfer function . 38
C.3 Triaxial test set-up . 40
C.3.1 General . 40
C.3.2 Measurement of cable assemblies . 41
C.3.3 Measurement of connectors . 42
C.4 Conclusion . 45
Annex D (informative) Influence of contact resistances . 46
Annex E (informative) Direct measurement of screening effectiveness of connectors . 48
E.1 General Scope . 48
E.2 Test set-up. 48
E.3 Construction details of test set-up . 49
Annex F (normative) Mixed mode S-parameters . 51
F.1 General . 51
F.2 Definition of mixed mode S-parameters . 51
F.3 Reference impedance of a VNA . 54
Annex G (normative) Accessories for measuring coupling attenuation . 55
G.1 TP connecting unit . 55
G.2 Termination of the DUT . 55
G.3 Test adapter . 56
G.3.1 General . 56
G.3.2 Direct feeding with coaxial cables . 56
G.3.3 Balanced feeding cable . 57
G.3.4 Movable short circuit . 57
Annex H (informative) Low frequency screening attenuation . 59
Bibliography . 60

Figure 1 – Definition of Z . 11
T
Figure 2 – Principle of the test set-up to measure transfer impedance and screening or
coupling attenuation of connectors with tube in tube . 14
Figure 3 – Principle of the test set-up to measure transfer impedance and screening
attenuation of a cable assembly . 17
Figure 4 – Principle set-up for verification test . 19
Figure 5 – Preparation of balanced or multiconductor connectors . 22
Figure 6 – Test set-up (principle) for transfer impedance measurement according to
test method B of IEC 62153-4-3 with load resistor in inner circuit and without damping
resistor in outer circuit . 23
Figure 7 – Measuring the screening attenuation with tube in tube with impedance
matching device . 25
Figure 8 – Measuring the coupling attenuation with tube in tube and balun .

– 4 – IEC 62153-4-7:2021 RLV © IEC 2021
Figure 8 – Coupling attenuation, principle test set-up with 2-port VNA and balun . 28
Figure 9 – Coupling attenuation, principle set-up with multiport VNA and
TP‑connecting unit .
...

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