The adapter is for the connection of waveguide ports in different waveguide bands and coaxial transmission lines.

Fre(GHz)  Flange Connector VSWR Dimension (mm)  
2.60-3.95  PDR-34  SMA/N  1.25  68 74 34 18
5.38-8.17  PDR70  SMA/N  1.25  40 45 24 18
8.2-12.4  UG39/U  SMA/N  1.25  38 25 22 17
10.0-15.0  UBR120  SMA/N  1.25  34 24 20 17
12.4-18.0  UG419/U  SMA/N  1.25  32 22 20 17
18.0-26.5  UG595/U  SMA/N  1.25  30 20 20 14
18.0-26.5  UG595/U  K  1.25  30 26 22 10
26.5-40  UG599/U  K  1.25  30 25 22 10
26.5-30  UG599/U  K  1.2  30 25 22 10
32-36  UG599/U  K  1.2  30 25 22 10
36-40  UG599/U  K  1.2  30 25 22 10
33-42  UG383/U  K  1.30  30 25 22 10