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A 0.38THz Traveling Wave Tube (TWT) based on the sine waveguide and sheet beam tunnel is proposed to amplify the terahertz wave. In this paper, the high frequency characteristics of sine waveguide with sheet beam tunnel are calculated by 3-D high frequency simulation software. From the particle-in-cell simulation results, this beam-wave interaction can produce output power 13W at 0.38THz, and the...
A 340GHz backward wave oscillator (BWO) based on the sine waveguide and pencil electron beam is presented as a novel terahertz radiation source. The particle-in-cell (PIC) simulation results predicts that this device can produce the output power of over 2.7W in the frequency range of 335.8–348.5GHz by utilizing a 20mA pencil beam and adjusting the voltage from 12kV to 14 kV.
A 140GHz traveling-wave tube (TWT) by utilizing the sine waveguide slow wave structure (SWS) combined with the electron sheet beam is designed to develop the high power millimeter-wave radiation source. The investigation results reveal that this TWT can produce over 30W output power in the range from 135GHz to 151GHz. The maximum output power reaches 68.63W at 138GHz, which corresponds to a gain of...
For a G-band sheet beam extended interaction klystron (SBEIK), an eight-gap extended output cavity that operates in the 2π mode, is optimized by using an equivalent method, in which the external load is replaced by a lossy region in 3D particle-in-cell model. The optimized eight-gap extended output cavity has 681.9 unloaded Q, 952 external Q and 397.3 loaded Q at 220 GHz. The simulations based on...
A Q-band continue wave Traveling-Wave Tube was design with Folded Waveguide as its slow wave structure. When the beam voltage is 20KV and the beam current is 0.15A, respectively, the simulation shows it can produce over 200 watts of saturable output power within 43.5–45.5GHz. Some important components including slow wave structure, attenuator magnetic system and collector was analysis and fabricated...
A Ka-band traveling-wave tube (TWT) was fabricated with a folded waveguide (FWG) as its slow-wave structure. The TWT demonstrates more than 700-W radio-frequency peak output power within a 2.5-GHz bandwidth. Because this type of TWT can be manufactured and assembled in an easy and cheap way, the FWG TWT will be a competing high-power millimeter wave source, compared to helix and coupled-cavity TWTs...
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