Key Specifications, Waveguide Size: WR-28, Coax Connector Series: 2.92mm, Coax Connector Gender: Female, Waveguide Adapter Style: Right Angle, Minimum Frequency: 26.5 GHz, Maximum Frequency: 40 GHz, Maximum VSWR: 1.25:1. WR-28 UBR320 Flange to 2.92mm Female Waveguide to Coax Adapter Operating from 26.5 GHz to 40 GHz in Aluminum. PEWCA1104 WR-28 waveguide to coax adapter is also known as a WR-28 waveguide transition. This waveguide to coax adapter / transition is constructed as a WR-28 to 2.92mm connector and has a female gender. Our WR28 to 2.92mm female waveguide adapter transition has a right angle design and has a UBR320 flange. Pasternack right angle WR-28 to 2.92mm waveguide to coaxial cable transition / adapter has a minimum frequency of 26.5 GHz and a maximum frequency of 40 GHz. WR28 waveguide to 2.92mm transition adapter to coax PEWCA1104 is part of over 40,000 RF, microwave and millimeter wave components available from Pasternack. Our WR-28 waveguide adapter transition with 2.92mm interface can ship worldwide the same day that it is purchased as with our other available RF parts.