Annular metal resonant cavity waveguide filter

The present invention discloses an annular metal resonant cavity waveguide filter. The filter comprises a metal resonant cavity, a first waveguide feed port and a second waveguide feed port, the metal resonant cavity is internally embedded with one or more plate metals, and the plate metals and the metal resonant cavity form the metal resonant cavity; and the left and right walls of the metal resonant cavity are respectively provided with a first feed coupling slit and a second coupling slit, the first feed coupling slit is connected with the first waveguide feed port, and the second feed coupling slit is connected with the second waveguide feed port. The annular metal resonant cavity waveguide filter is high in selectivity, high in Q value and simple in design and processing, is simple in structure and convenient to process and realizes while realizing the good filtering performance. 本发明公开了种环形金属谐振腔波导滤波器，包括金属谐振腔、第波导馈电端口和第二波导馈电端口，所述金属谐振腔内嵌块或多块金属板，所述金属板和金属谐振腔起形成环形金属谐振腔，所述环形金属谐振腔的左、右壁上分别开有第馈电耦合缝隙和第二馈电耦合缝隙，所述第馈电耦