Key Specifications, Maximum Power: 2 Watt, Waveguide Size: WR-90, Minimum Frequency: 8.2 GHz, Maximum Frequency: 12.5 GHz. 2 Watts WR-90 Waveguide Load 8.2 GHz to 12.5 GHz Copper with UG-39/U Flange. The PEW90TR002 is a WR-90 waveguide termination/load that operates in the frequency range of 8.2 GHz to 12.5 GHz. This WR-90 waveguide termination has a Max VSWR of 1.03:1. This waveguide termination design is made of painted brass and incorporates a UG -39/U flange. Waveguide terminations are part of Pasternack’s comprehensive waveguide product offerings which are available in stock and ready for same-day shipment.