Network modelling of periodic patch loaded slotline

A network model of a patch loaded slotline (PLS) is proposed for the efficient design of related microwave circuits. The unit model is established by combining the network model for a slotline-to-microstrip transition with the equivalent circuits for microstrip step-discontinuities and open-ends. Therefore, this model is useful for the analysis of periodic PLS structures only by cascading it with a uniform slotline. To validate it, the computed results are compared with the EM simulated and measured ones, and they are shown to give good agreement in a wide frequency range.