W-band TWT Component Fabrication and Testing

We present fabrication and testing of RF components for a W-band serpentine waveguide TWT. Broadband ceramic RF windows and loads exhibit reflection lower than −20 dB across the TWT operating band, nominally 87–100 GHz. End-to-end cold test of the entire tube assembly, including interaction circuit, shows a clean passband better than −15 dB, in agreement with simulation. We discuss details of the fabricated components and electromagnetic cold test results.