| 摘要 |
An embodiment of the present invention discloses a waveguide filter, which relates to wireless communications technologies. The waveguide filter of the present invention is formed by means of adaptation between waveguides at different layers of circuits, where a circuit structure is relatively simple. The waveguide filter of the present invention includes a first waveguide at an upper layer and a second waveguide at a lower layer, where the first waveguide and the second waveguide are isolated from each other by a metal isolation layer, the first waveguide forms a first resonant cavity, the second waveguide forms a second resonant cavity, the first resonant cavity and the second resonant cavity overlap each other, and a coupling slot is disposed at the metal isolation layer in an overlapping area. |
