Substrate integrated waveguide directional coupler based on semi-mode waveguide structure

The invention provides a substrate integrated waveguide directional coupler based on a semi-mode waveguide structure, and belongs to the technical field of integrated waveguide. The substrate integrated waveguide directional coupler based on the semi-mode waveguide structure comprises a first dielectric substrate, a second dielectric substrate and ports, wherein an upper metal layer is arranged on the upper surface of the first dielectric substrate, and a coupling metal layer is arranged on the lower surface of the first dielectric substrate; the upper metal layer comprises a feeder line, a waveguide upper surface and an edge hole I; coupling holes are formed in the coupling metal layer; the upper surface of the second dielectric substrate is tightly adhered to the coupling metal layer on the lower surface of the first dielectric substrate; a lower metal layer is arranged on the lower surface of the second dielectric substrate; the lower metal layer comprises a bending feeder line and a waveguide lower surfac