Channelized coplanar waveguide: discontinuities, junctions, and propagation characteristics

The authors present lumped-element circuit models for several CCPW (channelized coplanar waveguide) discontinuities, together with their element values as a function of frequency. The discontinuities characterized are an open circuit and a right-angle bend. The measured frequency dependence of the effective dielectric constant, epsilon (eff), and the unloaded quality factor, Q, are also presented for CCPW lines fabricated on epsilon (r)=2.2+or-0.02 RT/Duroid 5880, epsilon (r)=6.0+or-0.15 RT/Duroid 6006, and epsilon (r)=10.2+or-0.025 3M Epsilam-10 substrates. Attention is then given to the design and characterization of CCPW T-junction and 1-to-3 in-phase, matched power divider. The performance of a novel coax-to-CCPW in-phase, N-way radial power divider circuit is also presented.<>