Design and Simulation of a Waveguide-to-Microstripline Transition for Planar Slow Wave Structures

Microwave technology stands as a critical cornerstone in numerous modern applications, spanning from telecommunication and radar to high-power amplification. Efficient interfaces between different transmission line technologies have become imperative in the development of microwave devices. In this context, this work introduces a possible transition between waveguide and microstrip line, specifically designed to operate around 30GHz frequency range with a bandwidth of approximately 7 GHz. This adapter was originally conceived to streamline the integration of planar slow wave structures into high-frequency systems, and its straightforward approach not only simplifies the fabrication process but also readily facilitates the extension of its operating frequency range.