The development of high-frequency and high-speed communication technology requires materials to have lower dielectric constant and lower dielectric loss factor.The dielectric constant and dielectric loss factor are not only relat-ed to the chemical structure of the material,but also to the trace impurities in the material.Especially at high frequencies,heterogeneous residues have a significant impact on the dielectric loss factor.This work used polystyrene as the standard material,and introduced several representative small amounts of metal salts,organic molecules,and inorganic particles to make standard composite resin test discs.The dielectric constant and dielectric loss factor were measured at a high fre-quency of 10 GHz to study the influence of material dielectric properties.The results showed that high valence metal ions,organic molecules or inorganic particle residues significantly increased the dielectric loss of the composite sheet,but their dielectric constant did not change significantly.The high-frequency dielectric properties of materials can be controlled by controlling the content,ion valence state,molecular polarity,interface,and porosity.
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