ASTM-D5568 2008

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D5568-08 Standard Test Method for Measuring Relative Complex Permittivity and Relative Magnetic Permeability of Solid Materials at Microwave Frequencies

Published By	Publication Date	Number of Pages
ASTM	2008	8

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Categories: 17.220.01 - Electricity. Magnetism. General aspects, ASTM

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Description

1.1 This test method covers a procedure for determining relative complex permittivity (relative dielectric constant and loss) and relative magnetic permeability of isotropic, reciprocal (non-gyromagnetic) solid materials. If the material is nonmagnetic, it is acceptable to use this procedure to measure permittivity only.

1.2 This measurement method is valid over a frequency range of approximately 100 MHz to over 20 GHz. These limits are not exact and depend on the size of the specimen, the size of rectangular waveguide transmission line used as a specimen holder, and on the applicable frequency range of the network analyzer used to make measurements. The practical lower and upper frequencies are limited by specimen dimension requirements (large specimens at low frequencies and small specimens at high frequencies). Being a non-resonant method, the selection of any number of discrete measurement frequencies in a measurement band would be suitable. Use of multiple rectangular waveguide transmission line sizes are required to cover this entire frequency range (100 MHz to 20 GHz). This test method can also be generally applied to circular waveguide test fixtures. The rectangular waveguide fixture is preferred over coaxial fixtures when samples have in-plane anisotropy or are difficult to manufacture precisely.

1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are in English units. The equations shown here assume an e ^{+j ? t} harmonic time convention.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology
2	Summary of Test Method Significance and Use Interferences
3	Apparatus Test Specimen FIG. 1
4	Preparation of Apparatus Procedure Calculation
5	FIG. 2 TABLE 1
6	Report Precision and Bias
7	Keywords A1. LIST OF IMPORTANT SYMBOLS A2. FREQUENCY INDEPENDENT SERIES CAPACITOR MODEL FOR AIR GAP CORRECTIONS A2.1 A2.2 A2.3 A2.4 A2.5

Additional information

Standard Title	D5568-08 Standard Test Method for Measuring Relative Complex Permittivity and Relative Magnetic Permeability of Solid Materials at Microwave Frequencies
Published Code	ASTM
Publication Date	2008
Pages Count	8
ICS Codes	17.220.01 - Electricity. Magnetism. General aspects

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ASTM-D5568 2008

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