Ridge gap waveguides have been considered promising guiding structures in high-frequency applications. One of the major problems that face this guiding structure is the limited ability to utilize the possible bandwidth due to the narrow band transitions. Moreover, this technology is recently coined and still needs to go through a long path of development to form standard transitions, adapters, and components. In this research project, our major objective was to create basic milestones for the ridge gap waveguide library. We have developed transitions, power dividers, and couplers based on novel models along with experimental validation. We have also deployed these components in different applications such as dielectric constant measurements and leaky wave antennas. We have developed a design procedure for a wideband coaxial to ridge gap waveguide transition, where this transition shows excellent return loss compared to all published work. Through this transition, we have eliminated one of the most critical limitations that face the ridge gap waveguide structure deployment by providing a full band transition. Moreover, the transition has high power handling capability, which complies with high data rates- high power systems. Also, we have developed various 3-dB ridge gap waveguide couplers with wideband coverage, power dividers, Ortho-modal Transducers (OMTs), and active elements interfaces. This project was funded by an NSERC Engage grant and it merged the scientific background of our pioneer research group with the industrial experience of the Scientific Microwave corporation. The preliminary results of this project have been published in various conference articles. Afterward, the outcomes of the project are published in seven transactions in the highest-impact journal in the microwave research community. Furthermore, we have merged this guiding structure with graphene material to produce a reconfigurable structure at the THz range. This innovative idea has been published as a journal article in scientific reports.
