GB/T 42741-2023 English PDF

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GB/T 42741-2023: Measuring method for electromagnetic parameters of solid materials using air-free space
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Basic data

Standard ID: GB/T 42741-2023 (GB/T42741-2023)
Description (Translated English): Measuring method for electromagnetic parameters of solid materials using air-free space
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: K04
Classification of International Standard: 17.240
Word Count Estimation: 13,173
Date of Issue: 2023-05-23
Date of Implementation: 2023-12-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42741-2023: Measuring method for electromagnetic parameters of solid materials using air-free space

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 17:240 CCSK04 National Standards of People's Republic of China Solid materials using the free space method Electromagnetic parameter measurement method materials using air-freespace Released on 2023-05-23 2023-12-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee

table of contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Abbreviations 2 5 General requirements 2 5:1 Environmental conditions 2 5:2 Test sample requirements 2 5:3 Measuring equipment 3 6 Measurement method 4 6:1 Principle 4 6:2 Calculation of electromagnetic parameters 4 6:3 Multivalued Problem Solving 5 6:4 Electromagnetic parameter measurement 5 6:5 Measurement step 6 7 Test report 7 Appendix A (Informative) Free Space Method Data Recording Form 8 Reference 9

foreword

This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting: Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents: This document is proposed by China Electrical Equipment Industry Association: This document is under the jurisdiction of the National Standardization Technical Committee on Electromagnetic Shielding Materials (SAC/TC323): This document is drafted by: Qingdao Xingyi Electronic Equipment Co:, Ltd:, Shanghai Institute of Metrology and Testing Technology, China Electronics Cosiyi Technology Co:, Ltd: Co:, Ltd:, Anhui Normal University, China Institute of Metrology, Maxim New Materials Co:, Ltd:, Harbin Institute of Technology, Zhongke Ruijin (Shandong) Titanium Industry Technology Co:, Ltd:, Institute of Metal Research, Chinese Academy of Sciences, University of Electronic Science and Technology of China, Jiangsu Provincial Institute of Metrology, Beijing Wu Institute of Electricity Metrology and Testing, the 41st Research Institute of China Electronics Technology Group Corporation: The main drafters of this document: Nian Fushun, Guo Rongbin, Wang Yahai, Dong Jigang, Zhao Rui, Cai Qing, Zou Qiao, Chen Chaochan, Jiang Ziqi, Chen Changle, Wu Jie, Liu Xiaoming, Zhu Jiangang, Huang Pan, Ma Song, Bai Chunguang, Lu Zhengang, Chen Weibin, Li En, Zhao Pinzhang, Han Yufeng, Lu Fumin, Xu Hao: Solid materials using the free space method Electromagnetic parameter measurement method

1 Scope

This document describes the general requirements and requirements for the measurement of electromagnetic parameters of solid materials using the free space method in the frequency range of 2 GHz to 110 GHz: Measurement methods: This document is applicable to the use of the free space method to determine the complex relative permittivity, complex relative magnetic permeability and other parameters of homogeneous and isotropic solid materials: measurement of numbers:

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document: GB/T 2900:74-2008 Electrotechnical Terminology Circuit Theory GB/T 4365 Electrotechnical Terminology Electromagnetic Compatibility GB/T 35679-2017 Method for measuring electromagnetic parameters of solid materials using waveguide devices in the microwave frequency band

3 Terms and Definitions

GB/T 2900:74-2008, GB/T 4365, GB/T 35679-2017 and the following terms and definitions apply to this document: 3:1 εr Calculated by formula (1): εr=ε'r-jε″r= D → ε0E→ (1) In the formula: j --- imaginary number symbol; εr --- complex relative permittivity; ε'r --- the real part of the complex relative permittivity; ε″r --- the imaginary part of the complex relative permittivity; ε0 ---Vacuum dielectric constant, approximately equal to 8:85×10-12F/m; D→ --- Electric displacement vector, the unit is coulomb per square meter (C/m2); E→ --- Electric field intensity vector, the unit is volts per meter (V/m): Note 1: The complex relative permittivity of a solid material is determined by the molecular polarization characteristics and charge transfer characteristics of the material: The solid materials targeted in this method are isotropic isotropic solid material, so the complex relative permittivity at each frequency point is a single complex number: In an anisotropic medium, the complex relative permittivity is three dimension space tensor: ......

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