Losses in a Superconducting Quarter Wavelength Coplanar Resonator

In this paper we present results of the experimental investigation of quarter wavelength coplanar resonator at millikelvin temperatures. Also, a comparison with the data obtained from analytical expressions and from electromagnetic simulations is made. It is shown that the previously developed design methodology of such resonators is in a good agreement with real parameters of the system. It is experimentally shown that in the manufactured sample there are parasitic two-level defects, in fact objects of the quantum nature which presence explains small dispersion of the expected parameters. Their influence on the main characteristics of the system was studied.