We describe a vapor-phase codeposition method to fabricate a ceramic-in-polymer composite system comprising ferroelectric barium titanate nanoparticles in a highly polarizable polyaniline-polyurethane copolymer host. As-deposited composites exhibited a capacitance density of 15nF∕cm2 and a resonance frequency close to 100MHz with a loss tangent of 0.8. Annealing nanocomposites at 135°C resulted in slightly reduced but frequency-independent capacitance density (∼10nF∕cm2) with a loss tangent of 0.1 and resonance frequency at 200MHz. The interplay of polarization modes is discussed in relation to capacitor performance. The fabricated capacitors have potential for applications in embedded technology in the radio frequency.