Waveguide coupled filter structures and electrical devices

Abstract

This application relates to a waveguide-coupled filter structure and an electrical device. The waveguide-coupled filter structure includes an input waveguide for receiving electromagnetic wave signals, a closed-loop ring waveguide, and an output waveguide for outputting electromagnetic wave signals. The ring waveguide includes at least one torsion segment connected sequentially along its circumference, the torsion segment being twisted about an axis extending radially around itself by a positive integer multiple of 180°. A resonant channel extending circumferentially is provided within the ring waveguide, and the ring waveguide is coupled to the input waveguide to allow electromagnetic wave signals to enter the resonant channel. The ring waveguide is also coupled to the output waveguide to allow electromagnetic wave signals within the resonant channel to enter the output waveguide. This waveguide-coupled filter structure has multiple functions, including coupling the input and output waveguides at arbitrary angular positions in three-dimensional space, signal filtering, and polarization rotation, significantly improving the integration density of systems incorporating this waveguide-coupled filter structure.

Images