Model-based characterization of finite-periodic finite-ground coplanar waveguides

Two types of finite-periodic finite-ground coplanar waveguide (FP-FGCPW) structures are proposed with a simplified network equivalence of N-stage circuit network. A joint field/circuit model is applied to characterize frequency response of the periodic structures with the help of extracted circuit parameters of single cell geometry. In this approach, each cell with arbitrary pattern is perceived as two line sections and a series inductance network, which quasi-lumped circuit model is accurately extracted by applying our “short-open calibration” (SOC) technique in a full-wave method of moments (MoM). Modeling results exhibit some excellent stop-band filtering behavior as the number of periodic cell increases from N=2 to 6. It is shown that this developed network technique provides a very efficient strategy for the design of FGCPW-based periodic structures that consist of an arbitrarily finite number of periodic cells