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BS EN IEC 61726:2022

BS EN IEC 61726:2022

$142.49

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

Published By Publication Date Number of Pages
BSI 2022 26
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This standard describes the measurement of screening attenuation by the reverberation chamber measurement method, also called mode stirred chamber method. This standard 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 and etc. Modern electronic equipments have shown a demand for methods for testing screening attenuation performance of microwave components over their whole frequency range. Convenient measurement methods have existed for lower frequencies and components of regular shape. These measurement methods are described in IEC 62153 series standards. For much higher frequencies and for components of irregular shape, the reverberation chamber method should be used. Theoretically, the reverberation chamber method has no upper limit of the measurement frequency, but it is limited by the quality and sensitivity of the measurement system, and the lower limit of the measurement frequency is restricted by the size of the reverberation chamber.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
6 Blank Page
7 English
CONTENTS
9 FOREWORD
11 1 Scope
2 Normative references
3 Terms and definitions
12 4 Principle of screening attenuation measurement
Figure 1 – System configuration example of screening attenuation by reverberation chamber
14 5 Measurement equipment
5.1 General test instruments
5.1.1 Frequency synthesizer
5.1.2 Spectrum analyser
5.1.3 Reverberation chamber
Figure 2 – System configuration example of screening attenuation by reverberation chamber with only one spectrum analyser
15 5.1.4 Mode stirrer
5.1.5 Input antenna
5.1.6 Reference antenna
5.1.7 Stepper motor
5.1.8 Linking devices
Table 1 – Recommended antennas
16 5.1.9 Other instruments
5.2 Return loss requirements for linking devices
5.3 Sampling system
5.3.1 General
5.3.2 Normal sampling system
17 5.3.3 Fast sampling system
6 DUT
6.1 DUT preparation
6.1.1 Cables
Table 2 – Number of sampling positions recommended for calibration and test
18 6.1.2 Connector
6.1.3 Cable assemblies
6.1.4 Passive microwave components
6.2 Installation of DUT
7 Measurement procedure
19 8 Caution notes
8.1 Speed of mode stirrer
8.2 Measurement of lossy DUT
8.3 Oscillation and resonance
20 8.4 Positioning of spectrum analyser
8.5 High power signal test
8.6 High dynamic range test
9 Acceptance criterion
10 Information to be given in the relevant specification
11 Test report
21 Annex A (informative)Example of a calibrator
A.1 Relationship between transfer impedance and screening attenuation
22 A.2 Example of a calibrator
Figure A.1 – Basic construction details
24 Bibliography

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BS EN IEC 61726:2022
$142.49