The 35WR Series from Anritsu is a range of waveguide to coaxial adapters that operate from 18 GHz to 65 GHz. These adapters transform standard or double-ridge waveguide to coaxial K Connector/V Connector interfaces. They have a VSWR under 1.38:1 and the K connectors are compatibility with SMA and 3.5 mm options whereas the V connectors are compatible with 2.4 mm.