▎ 摘　　要

NOVELTY - Composite comprises: 50-90 wt.% thermoplastic resin comprising polycarbonate polysiloxane copolymer; and 10-50 wt.% carbon-based filler, where the composite exhibits a dielectric constant ( epsilon ') of 5-20 and dissipation loss ( epsilon '') of 0.1-6, measured at frequencies of 10-120 GHz. USE - The composite is useful as: a component of an automotive radar sensor for electromagnetic radiation; and a microwave absorptive device or a component (all claimed). ADVANTAGE - The composite: exhibits a dielectric constant ( epsilon ') of 5-20 and dissipation loss ( epsilon '') of 0.1-6, measured at frequencies of 10-120 GHz; has a dissipation factor (Df) of 0.003-1 when determined as a ratio of epsilon '' and epsilon ' measured in transmission mode; and exhibits microwave absorptive and shielding properties.