Analysis of a compact slot resonator in the ground plane for microstrip structures

A novel slot resonator in the ground plane for microstrip structures is proposed for filters and periodic structures. The resonant frequencies for one resonator are designed utilizing transmission line models with a lumped-element model extracted from the full-wave simulation. When these resonators are cascaded in a ground plane, the lumped-element model is used to simulate the frequency response with significant reduction of simulation time and good agreement with measurements.