Waveguide connector couplers and adapters

A waveguide connector assembly for coupling a waveguide to a microwave device, the waveguide comprising at least one flange at an end of the waveguide, the waveguide connector assembly comprising:

• a male part comprising:
• a threaded external cylindrical surface defining a male center axis that defines a male axial direction;
• a first end surface;
• and
• a second end surface opposed to the first end surface;
• and
• a female part comprising:
• a first annular end surface;
• a second annular end surface opposed to the first annular surface, wherein a center of the first annular end surface and a center of the second annular end surface define a female center axis that defines a female axial direction;
• a threaded internal cylindrical surface configured to engage with the threaded external cylindrical surface of the male part, the internal cylindrical surface including an inner radius of the first annular end surface;
• a hollow internal space defined by the threaded internal cylindrical surface, wherein the hollow internal space has a width and height that are both larger than a largest cross-sectional dimension of the first waveguide;
• and
• a gap in the threaded internal cylindrical surface that extends in the female axial direction from the first end annular end surface to the second annular end surface, and extends in a female radial direction the entire width of the first annular end surface and the second annular end surface, wherein the gap is wider than a width of the waveguide.