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A broadband pill-box window with sapphire piece for 0.14THz folded waveguide traveling wave tube is manufactured. Cold-test result shows the attenuation of the window is about 0.7dB during 0.13THz-0.15THz. Using the back-to-back method, the RF coupling system including pill-box and taper waveguide is test. The result shows that the VSWR is less than 1.2, which meets the practical requirements in 0...
A design of CW 1W 0.14THz folded waveguide TWT is investigated. The electron beam tube is manufactured, and beam transmission of 82% for a 14.8mA beam at 21.5kV. The RF coupling system and attenuator are manufactured and tested. The test results showed good performance that can meet the practical requirements in folded waveguide TWT. The first prototype has been built. Latest test results will be...
A 0.14 THz Watt level folded waveguide traveling wave tube was designed and optimized by CST simulation, including folded waveguide structure, electron gun, periodic permanent magnet, input-output structure, box window and beam-wave interactions. The design results showed over 6 Watt output power. In order to validate the flux rate of electrons, a flux tube was fabricated and tested. Results showed...
A simple method based on the physics characteristics to get the main parameters of folded waveguide traveling wave tube (TWT) circuit is present. Providing the operating frequency and beam voltage, we can obtain the initial structure parameters of the folded waveguide slow-wave structure. An 220GHz folded waveguide slow-wave structure is designed to verify this method. The cold characteristics including...
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