Inclusion of Concentric Ring Split Structures in the Microwave Transmission Lines to Control their Conductive Properties

The purpose of the research carried out in this work was the development model of filtering band-barrier properties of conducting composite (meta-material) structures consisting of two concentric strip rings having cuts in diametrically opposite directions and possible combinations thereof in the form of several similar elements. Calculated and experimental studies were carried out on the example of the coplanar transmission line section in which these filtering structures are placed on the reverse side of the conducting section. As a result, it was revealed that the double split ring resonators are an effective strip-barrier composite structure for coplanar, strip line and the like transmission lines. All the results of the calculation and CAD modeling were experimentally tested on the mock-ups made (layouts). New practical possibilities were found for tuning the resonant frequency of these structures (in the range of about 50%) by rotating the proposed designs of mobile modules with split rings. They can be placed under the conductive line in a convenient place for installation. The methods of resonant frequency tuning and fine tuning of the bandwidth and the transmission factor are described in the configuration of working models [1]–[11].