Abstract
In this paper we report on the development of a millimeter wave (MMW) broadband high power traveling wave tube (TWT). Specifically, the development of a solid state vacuum device (SSVD™) based Q-band TWT that covers the bandwidth of 38-42 GHz with a saturated power of around 120 Watts will be presented. Our SSVD™ technology employs solid state integrated circuit design and fabrication for the beam-wave interaction circuit slow wave structure (SWS) to realize and achieve high performance MMW TWTs. The Q-band SSVD™ TWT uses a novel coupled cavity type beam-wave interaction circuit SWS ideal for microfabrication manufacturing and high power at MMW high frequencies. The Q-band SSVD™ based TWT is designed with a cathode voltage of less than 10 kV. This Q-band SSVD™ based TWT has a gain of 40 dB and capable of driving a milliwatt-level solid state driver to 120 Watts. The SSVD™ based Q-band TWT has the size of 260 mm × 55 mm × 51 mm (L×W×H) and weighs around 4 pounds.
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