What is the PCB dielectric constant?

Dielectric constant is a value that reflect the ability of a type of material to store electrical energy. The dielectric constant value for PCB base material is typically from 3.8-4.8. You can easily find it from the datasheet of PCB base material, such as the Dielectric constant for Shengyi s1000-2 is 4.4 (@Permittivity (1GHz)).

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