Directional crossguide couplers which have a high directivity with short insertion lengths in single and multiport forward and reflected power flow. Output ports are coaxial or waveguide with built-in terminations. The VSWR on all ports is less than 1.25 maximum. The VSWR on the main line is less than 1.10 maximum. The coupling levels range from 20 to 60 dB with a mean variation of less than 1.0 dB. All tolerances are ? .020. Finish is flat black unless otherwise specified.