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GB/T 42741-2023Measuring method for electromagnetic parameters of solid materials using air-freespace (English PDF)

固体材料使用自由空间法的电磁参数测量方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 23, 2023

Implementation date

December 1, 2023

Scope

GB/T 42741-2023 is the English-translated version of 固体材料使用自由空间法的电磁参数测量方法.

This document describes the general requirements and the measurement methods for determining the electromagnetic parameters of solid materials by the free space method over the frequency range 2 GHz to 110 GHz.

The document applies to the measurement, by the free space method, of the complex relative permittivity, the complex relative permeability and the other related parameters of homogeneous, isotropic solid materials.

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Document preview — GB/T 42741-2023

National Standard of the People's Republic of China

ICS: 17.240
Classification: K 04

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

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

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.

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 Epsilonr

Calculated by formula (1). D -> epsilon0E-> (1) In the formula. j --- imaginary number symbol; epsilonr --- complex relative permittivity; epsilon'r --- the real part of the complex relative permittivity; epsilon"r --- the imaginary part of the complex relative permittivity; epsilon0 ---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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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

Similar standards

GB/T 10257-2025|GB/T 43817-2024|GB/T 44645-2024|GB/T 43535-2023|GB/T 10255-2013|GB/T 10256-2013

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