  Microwave photonics is a remarkably powerful system for quantum simulation
and technologies, but its integration in superconducting circuits, superior in
many aspects, is constrained by the long wavelengths and impedance mismatches
in this platform. We introduce a solution to these difficulties via compact
networks of high-kinetic inductance microstrip waveguides and coupling wires
with strongly reduced phase velocities. We demonstrate broadband capabilities
for superconducting microwave photonics in terms of routing, emulation and
generalized linear and nonlinear networks.
