Waveguide

A waveguide, comprising:

• two waveguide parts, each waveguide part of the two waveguard parts having a respective waveguide body, and a respective part of at least one waveguide channel which are arranged such that respect parts of the at least one waveguide channel, together, form the at least one waveguide channel when the two waveguide parts are joined together, opposing surfaces of the two waveguide parts being configured in parallel;
• wherein a pin is formed in the respective waveguide body of a first waveguide part of the two waveguide parts, which pin projects in a direction of a second waveguide part of the two waveguide parts, and a recess receiving the pin is formed in the respective waveguide body of a second waveguide par of the two waveguide parts, the pin and the recess being arranged coaxially relative to one another and the pin and the recess not coming into contact with each other in an assembled state of the waveguide.