Waveguide connecting tube having chamfered and tapered edges configured to connect with apertures in first and second waveguide devices

A waveguide interface comprising a first waveguide aperture, provided in a first waveguide device, a second waveguide aperture, provided in a second waveguide device, and a waveguide connecting tube having a longitudinal extension and comprising waveguide walls and a connecting waveguide aperture for transfer of microwave signals, wherein the waveguide connecting tube comprises a first end that is adapted to be at least partly inserted into the first waveguide aperture, and a second end that is adapted to be at least partly inserted into the second waveguide aperture, such that the first waveguide aperture and the second waveguide aperture are electrically connected via the waveguide connecting tube;

• wherein each end of the waveguide connecting tube is chamfered to have corresponding edge chamfers, where the waveguide devices comprise corresponding edge tapers that are adapted to be engaged by the edge chamfers of the waveguide connecting tube and to provide alignment when the waveguide connecting tube is inserted into each waveguide aperture.