A cured, shaped dielectric component, including a crosslinked product of a composite comprising a thermoplastic polymer, an optional crosslinking co-agent, an optional cure initiator, an optional additive composition, and a ceramic filler composition; wherein the cured, shaped dielectric component has a permittivity of 1.1 to 20 at 10 GHz; and wherein the cured, shaped dielectric component has no melt flow index when tested at 190° C., 2.16 kg, in accordance with ASTM D1238-20.