WRD180C24 Waveguide to Coaxial Adapters from Fairview Microwave are also known as waveguide to coax transitions. 2.92mm waveguide to coaxial adapters are in-stock and available for same day shipment. Fairview WRD180C24 Waveguide to Coaxial Adapters have a maximum frequency of 40 GHz and a max VSWR of 1.5. WRD180C24 Waveguide to Coaxial Adapters have a body material of copper and a connector body material of passivated stainless steel.