Superconducting niobium patterned to form strip transmission lines on sapphire and silicon dielectric substrates has been used to make passive delay lines, capacitively coupled resonators, and linear‐FM chirp filters. Chirp filters with a 37.5‐ns dispersion and 2.3‐GHz bandwidth were implemented by nonuniformly tapping nondispersive delay lines using proximity directional couplers. Pulse compression tests using two complementary filters agree well with theory. The results demonstrate a technology which promises to provide analog signal processing with about an order of magnitude bandwidth increase over surface‐acoustic‐wave and acousto‐optic devices.