GB/T 35680-2017Measuring method for electromagnetic parameters of liquid materials at microwave frequencies using an open-ended coaxial probe (English PDF)
液体材料微波频段使用开口同轴探头的电磁参数测量方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 29, 2017
Implementation date
July 1, 2018
Scope
GB/T 35680-2017 is the English-translated version of 液体材料微波频段使用开口同轴探头的电磁参数测量方法.
GB/T 35680-2017 is the Chinese standard "Measuring method for electromagnetic parameters of liquid materials at microwave frequencies using an open-ended coaxial probe".
Its scope clause reads: This standard specifies the method of measuring the electromagnetic parameters of liquid materials using an open coaxial probe in the microwave frequency band.
This standard applies to the range of 100MHz ~ 50GHz coaxial probe using open coaxial, isotropic liquid materials Relative permittivity and loss tangent detection. Its clauses include terms and definitions; test sample requirements.
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Document preview — GB/T 35680-2017
National Standard of the People's Republic of China
- ICS
- 17.240
- Classification
- N 05
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Preface
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 test sample requirements
- 5 General requirements
- 6 electromagnetic parameters measurement
- Appendix A (informative) coaxial probe parameters
- Appendix B (informative) single-port probe terminal calibration principle
- Appendix C (Informative) Electromagnetic parameters inversion method
- Appendix D (informative) test results Example
- References
1 Scope
This standard specifies the method of measuring the electromagnetic parameters of liquid materials using an open coaxial probe in the microwave frequency band.
This standard applies to the range of 100MHz ~ 50GHz coaxial probe using open coaxial, isotropic liquid materials
Relative permittivity and loss tangent detection.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 4365 Electrotechnical terminology Electromagnetic compatibility
3 Terms and definitions
GB/T 4365 defined and the following terms and definitions apply to this document.
3.1 Complex dielectric constant
Can be calculated by equation (1).
epsilon = epsilon0. epsilonr = epsilon0 (epsilon'-jepsilon ") (1)
In the formula.
epsilon0 --- vacuum dielectric constant, equal to 8.85 × 10-12F/m;
epsilonr --- complex relative permittivity;
epsilon '--- the real part of the relative permittivity;
epsilon "--- the imaginary part of relative permittivity.
NOTE The complex dielectric constant referred to in this standard actually refers to the relative dielectric constant, and the relative permittivity of the real part of epsilon 'and dielectric loss tangent tandeltaepsilon = epsilon "/ epsilon 'characterization.
4 test sample requirements
Test sample is uniform, isotropic liquid material, placed in a glass container, the sample dose should meet the type (2), type (3).
S not less than 10S1 (2) h>=80mm (3)
In the formula.
S --- test sample surface area of the test surface, in square meters (m2);
S1 --- probe terminal surface area, in square meters (m2);
h --- test sample depth.
Samples without impurities, before the test should ensure that the liquid even without bubbles.
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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.
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