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GB/T 35033-2018 English PDF

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GB/T 35033-2018: Measurement method on conductive properties of electromagnetic shielding material and bonding impedance of metal material for 30 MHz to 1 GHz
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GB/T 35033-2018English519 Add to Cart 5 days [Need to translate] Measurement method on conductive properties of electromagnetic shielding material and bonding impedance of metal material for 30 MHz to 1 GHz Valid GB/T 35033-2018

PDF similar to GB/T 35033-2018


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Basic data

Standard ID GB/T 35033-2018 (GB/T35033-2018)
Description (Translated English) Measurement method on conductive properties of electromagnetic shielding material and bonding impedance of metal material for 30 MHz to 1 GHz
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard L06
Classification of International Standard 33.100
Word Count Estimation 26,215
Date of Issue 2018-05-14
Date of Implementation 2018-12-01
Regulation (derived from) National Standards Announcement No. 6 of 2018
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 35033-2018: Measurement method on conductive properties of electromagnetic shielding material and bonding impedance of metal material for 30 MHz to 1 GHz


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Measurement method on conductive properties of electromagnetic shielding material and bonding impedance of metal material for 30 MHz to 1 GHz ICS 33.100 L06 National Standards of People's Republic of China Conductivity of electromagnetic shielding materials from 30MHz to 1GHz And metal material lap impedance measurement method Published on.2018-05-14 2018-12-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 impedance 3 5 S parameter 3 5.1 Overview 3 5.2 Two-port S parameter 3 6 Measurement requirements 3 6.1 Measurement environment requirements 3 6.2 Test sample requirements 4 7 Test System Requirements 4 7.1 System Composition 4 7.2 Measuring equipment 4 7.3 Measuring device 5 8 Calibration and validation of the test system 6 8.1 Overview 6 8.2 Calibration of the test system 7 8.3 Confirmation of the validity of the test system 8 9 Measurement method 9 9.1 Test Arrangement 9 9.2 Measuring methods for the electrical conductivity of electromagnetic shielding materials 9 9.3 Method for measuring the lap resistance of metallic materials 9 10 Reporting requirements 10 Appendix A (Normative Appendix) Calculation Formula for Lap Impedance Zt 11 Appendix B (normative appendix) Measurement device indicator verification procedure and example 14 Appendix C (informative) Electromagnetic shielding material conductivity and metal material lap impedance measurement example 21

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed and managed by the National Radio Interference Standardization Technical Committee (SAC/TC79). This standard was drafted. Shanghai Electric Apparatus Research Institute, Huawei Technologies Co., Ltd., Shanghai Tianwei Certification Technology Co., Ltd., Shanghai Institute of Measurement Technology. The main drafters of this standard. Yuan Shuchuan, Wang Qinghai, Zheng Junqi, Chen Yu, Chen Chaoyu, Liu Yuan, Xing Lin, Xu Shuai. Conductivity of electromagnetic shielding materials from 30MHz to 1GHz And metal material lap impedance measurement method

1 Scope

This standard specifies the electromagnetic shielding material conductive properties and metal material lap impedance measurement requirements, test system requirements, test system calibration The quasi-sum validity check and measurement method. The electromagnetic shielding material may include, but is not limited to, conductive foam, reed, wire mesh, conductive cloth, conductive rubber (the shielding body itself Outside) and so on. This standard is applicable to the electromagnetic properties of electromagnetic shielding materials and the bonding resistance of metal materials in the frequency range of 30MHz~1GHz. measuring.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 26667-2011 Electromagnetic shielding material terminology

3 Terms and definitions

The following terms and definitions as defined in GB/T 26667-2011 apply to this document. For ease of use, the following is repeated Some terms and definitions in GB/T 26667-2011. 3.1 Electromagnetic shielding Use conductive or magnetically permeable materials to reduce or block the propagation of electromagnetic fields to specified areas. [GB/T 26667-2011, definition 2.1.6] 3.2 Electromagnetic shielding material electromagneticshieldingmaterials A material that reduces or blocks the propagation of electromagnetic fields to a given area. 3.3 Electromagnetic shielding material conductive properties conductivepropertiesofelectromagneticshieldingmaterial The ability of the electromagnetic shielding material to conduct electricity. Note 1. The electromagnetic shielding material can be used to fill between two conductive surfaces to ensure the electrical continuity of the shielding body, and its electrical conductivity can be shielded by electromagnetic shielding. The measurement of material impedance is achieved. Note 2. When the electromagnetic shielding material is used for the filling material to be placed between the two conductive surfaces, as shown in Fig. 1, the impedance of the electromagnetic shielding material in the figure is the upper metal surface. The impedance Z1 between the surface and the electromagnetic shielding material, the inherent impedance Z2 of the electromagnetic shielding material, and the impedance Z3 between the lower metal surface and the electromagnetic shielding material The sum of the vectors. When the characteristics of the contact surface of the upper and lower metal and the electromagnetic shielding material (for example, material, surface flatness, surface plating, etc.) are fixed, Z to express the electrical conductivity of the electromagnetic shielding material. The conductivity of the material is related to the amount of compression (see 3.4). Note 3. The electromagnetic shielding material conductivity is expressed by the impedance Z.

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