Low-loss transmission line with multi-section conversion structure

The utility model discloses a low-loss transmission line with a multi-section conversion structure, which comprises a dielectric substrate, a transmission line top layer structure positioned at the top of the dielectric substrate and a metal floor positioned at the bottom of the dielectric substrate, the transmission line top layer structure comprises a grounding coplanar waveguide, a micro-strip transmission line, a micro-strip-substrate integrated waveguide transition structure, a substrate integrated waveguide and a substrate integrated waveguide-grounding coplanar waveguide transition structure, and is mainly composed of the micro-strip line, the substrate integrated waveguide and the grounding coplanar waveguide. All the parts are matched and connected through impedance conversion structures, the transmission line can reduce energy loss and radiation of the transmission line, has the advantages of being high in anti-interference performance and high in power capacity, can meet the requirement of a vehicl