Description
Test Port Adapters Waveguide Connectors Frequency Range: 1.7 – 40.0 GHz Available in all types of Waveguide Flange and Connectors. Mating compatible with the NMD3.5 connector found on some HP VNA test sets and the special 2.92mm (K) connector on some Anritsu test sets. We recommend that larger waveguide adapters (R, S, E, and G bands) not be connected directly to test sets without support.
https://www.satellitedish.com/waveguide-to-connector.pdf