IEVref: 121-12-14 ID: Language: en Status: Standard Term: complex relative permittivity Synonym1: relative complex dielectric constant [Deprecated] Synonym2: Synonym3: Symbol: εr Definition: under sinusoidal conditions in a medium where the phasors D and E representing respectively the electric flux density and the electric field strength are linearly related, complex quantity ε r defined by the relation D = ε0ε r E where ε0 is the electric constant Note 1 to entry: The complex relative permittivity is generally frequency dependent. For an isotropic medium, the complex relative permittivity is a scalar quantity; for an anisotropic medium, it is a tensor quantity. Note 2 to entry: Generally, εr is expressed as ε r = ε' r − jε''r where ε'r is the real relative permittivity and ε''r is the dielectric loss index, which represents dielectric losses. Publication date: 2019-10 Source: Replaces: 121-12-14:1998-08 Internal notes: CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: