IEC 61726:2022

Cable assemblies, cables, connectors and passive microwave components - Screening attenuation measurement by the reverberation chamber method

IEC 61726:2022 describes the measurement of screening attenuation by the reverberation chamber measurement method, also called mode stirred chamber method.
This document is applicable to screening attenuation measurements of cable assemblies, cables, connectors, and passive microwave components, such as waveguides, phase shifters, diplexers/multiplexers, power dividers/combiners, etc.
This fourth edition cancels and replaces the third edition published in 2015. This edition includes the following significant technical changes with respect to the previous edition:
a. reworded Clause 1 "Scope";
b. replaced IEC TS 62153-4-1 by IEC 62153 (all parts) in Clause 2;
c. added the definition of screening attenuation in 3.1;
d. added Clause 4 "Principle of screening attenuation measurement";
e. added the descriptions of some test set-ups, such as frequency synthesizer, spectrum analyser, stepper motor, linking devices and the sampling system, etc. in Clause 5;
f. added Clause 6 "DUT";
g. reworded Clause 7 "Measurement procedure";
h. added Clause 8 "Caution notes";
i. added Clause 9 "Acceptance criterion";
j. added Clause 10 "Information to be given in the relevant specification".

Cordons, câbles, connecteurs et composants hyperfréquence passifs - Mesurage de l'affaiblissement d'écran par la méthode de la chambre réverbérante

IEC 61726:2022 décrit le mesurage de l'affaiblissement d'écran par la méthode de mesure de la chambre réverbérante, également appelée "méthode de la chambre à brassage de modes".
Le présent document est applicable aux mesurages de l'affaiblissement d’écran des cordons, des câbles, des connecteurs et des composants hyperfréquence passifs, tels que les guides d'ondes, les déphaseurs, les diplexeurs/multiplexeurs, les répartiteurs/combineurs de puissance, etc.
Cette quatrième édition annule et remplace la troisième édition parue en 2015. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a. reformulation de l’Article 1 "Domaine d’application";
b. remplacement de l’IEC TS 62153-4-1 par l’IEC 62153 (toutes les parties) à l’Article 2;
c. ajout de la définition de l’affaiblissement d’écran en 3.1;
d. ajout de l’Article 4 "Principe de mesure de l’affaiblissement d’écran";
e. ajout des descriptions de certains montages d’essai, comme le synthétiseur de fréquences, l’analyseur de spectre, le moteur pas-à-pas, les dispositifs de liaison et le système d’échantillonnage etc. à l’Article 5;
f. ajout de l'Article 6 "DUT";
g. reformulation de l’Article 7 "Procédure de mesure";
h. ajout de l’Article 8 "Notes d’avertissement";
i. ajout de l’Article 9 "Critère d’acceptation";
j. ajout de l’Article 10 "Informations à fournir dans la spécification appropriée".

General Information

• Status: Published
• Publication Date: 17-Jul-2022
• ICS: 33.120.01 - Components and accessories in general
• Technical Committee: TC 46 - Cables, wires, waveguides, RF connectors, RF and microwave passive components and accessories
• Drafting Committee: WG 5 - TC 46/WG 5
• Current Stage: PPUB - Publication issued
• Start Date: 12-Aug-2022
• Completion Date: 18-Jul-2022

Relations

• Revises: IEC 61726:2015 - Cable assemblies, cables, connectors and passive microwave components - Screening attenuation measurement by the reverberation chamber method
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61726 ®
Edition 4.0 2022-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Cable assemblies, cables, connectors and passive microwave components –
Screening attenuation measurement by the reverberation chamber method

Cordons, câbles, connecteurs et composants hyperfréquence passifs –
Mesurage de l'affaiblissement d’écran par la méthode de la chambre
réverbérante
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IEC 61726 ®
Edition 4.0 2022-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Cable assemblies, cables, connectors and passive microwave components –

Screening attenuation measurement by the reverberation chamber method

Cordons, câbles, connecteurs et composants hyperfréquence passifs –

Mesurage de l'affaiblissement d’écran par la méthode de la chambre

réverbérante
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.120.01 ISBN 978-2-8322-3966-7

– 2 – IEC 61726:2022 © IEC 2022
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Principle of screening attenuation measurement . 7
5 Measurement equipment . 9
5.1 General test instruments . 9
5.1.1 Frequency synthesizer . 9
5.1.2 Spectrum analyser . 9
5.1.3 Reverberation chamber . 9
5.1.4 Mode stirrer . 10
5.1.5 Input antenna . 10
5.1.6 Reference antenna . 10
5.1.7 Stepper motor . 10
5.1.8 Linking devices . 10
5.1.9 Other instruments . 11
5.2 Return loss requirements for linking devices . 11
5.3 Sampling system . 11
5.3.1 General . 11
5.3.2 Normal sampling system . 11
5.3.3 Fast sampling system . 12
6 DUT . 12
6.1 DUT preparation . 12
6.1.1 Cables . 12
6.1.2 Connector . 13
6.1.3 Cable assemblies . 13
6.1.4 Passive microwave components . 13
6.2 Installation of DUT . 13
7 Measurement procedure . 13
8 Caution notes . 14
8.1 Speed of mode stirrer . 14
8.2 Measurement of lossy DUT . 14
8.3 Oscillation and resonance . 14
8.4 Positioning of spectrum analyser . 15
8.5 High power signal test . 15
8.6 High dynamic range test . 15
9 Acceptance criterion . 15
10 Information to be given in the relevant specification . 15
11 Test report . 15
Annex A (informative) Example of a calibrator . 16
A.1 Relationship between transfer impedance and screening attenuation . 16
A.2 Example of a calibrator . 17
Bibliography . 19

Figure 1 – System configuration example of screening attenuation by reverberation
chamber . 7
Figure 2 – System configuration example of screening attenuation by reverberation

chamber with only one spectrum analyser . 9
Figure A.1 – Basic construction details . 17

Table 1 – Recommended antennas . 10
Table 2 – Number of sampling positions recommended for calibration and test . 12

– 4 – IEC 61726:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CABLE ASSEMBLIES, CABLES, CONNECTORS AND PASSIVE
MICROWAVE COMPONENTS – SCREENING ATTENUATION
MEASUREMENT BY THE REVERBERATION CHAMBER METHOD

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