Rectangular waveguide resonators in planar form for filter applications

The paper observes microwave waveguide resonators in planar form and proposes a design for obtaining low-cost devices in planar form that are suitable for mass fabrication. Periodic resonators at 3.6 GHz are designed and simulated using this technique, which represents the advantages of this technology, resulting in the reduced size, cost and compactness of these components, while maintaining an easy fabrication process. This is achieved due to the configuration that holds both the microstrip and the rectangular waveguide interconnected by a simple taper on the same substrate.