This standard specifies the testing method for the microwave complex permittivity of uniform and isotropic solid dielectric materials. This standard is applicable to the determination of complex dielectric constant in the frequency range of 2GHz to 18GHz. The recommended testing frequency is 9.5 GHz. Its measurement range: the relative dielectric constant real part e is 2-20, and the dielectric loss angle tangent tan8. For 1 × 10- '-5 × 10-. 2. The complex dielectric constant is mainly defined as: i - eg - e=E (e '- je ") - - - - - - - - - - - - - - - - - (1) In equation: blanket - - complex relative dielectric constant; Eo - - vacuum dielectric constant, which is 8.854 × 10-1F/m. The complex dielectric constant mentioned in this standard actually refers to the relative dielectric constant and is characterized by the real part e of the relative dielectric constant and the dielectric loss angle tangent tan 8. - e "/e '
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