Leakage losses for the dominant mode of conductor-backed coplanar waveguide

The attenuation constant for the dominant mode of a covered, conductor-backed coplanar waveguide (CBCPW) is computed using the spectral domain technique. Attenuation is due to leakage in the form of the parallel-plate TEM mode in the substrate region. Curves are provided to assist in predicting leakage losses for monolithic microwave integrated circuits.>