  We propose a protection scheme of a superconducting microwave resonator to
realize a hybrid quantum system, where cold neutral atoms are coupled with a
single microwave photon through magnetic dipole interaction at an interface
inductor. The evanescent field atom trap such as a waveguide/nanofiber atom
trap, brings both surface-scattered photons and absorption-induced broadband
blackbody radiation which result in quasiparticles and a low quality factor at
the resonator. A proposed multiband protection layer consists of pairs of two
dielectric layers and a thin nanogrid conductive dielectric layer above the
interface inductor. We show numerical simulations of quality factors and
reflection/absorption spectra, indicating that the proposed multilayer
structure can protect a lumped-element microwave resonator from optical photons
and blackbody radiation while maintaining a reasonably high quality factor.
