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A novel slow-wave structure (SWS), named ridge-loaded sine waveguide (RLSWG), has been proposed to develop the wideband high-power terahertz traveling-wave tube (TWT). The slow-wave characteristics of the RLSWG SWS, including dispersion properties and interaction impedance, are analyzed by using the 3-D electromagnetic simulation software Ansoft high frequency structure simulator (HFSS). From our...
This paper describes a fan-shaped metal-loaded helix slow-wave structure (SWS) to develop ultra-wideband traveling-wave tube with low gain fluctuation. The electromagnetic characteristics and beam-wave interaction of this structure are calculated. The simulation results show that the helix TWT gain is more than 42dB and the signal gain fluctuation of the TWT is less than 2.5dB in a frequency range...
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...
We present a novel double V-shaped winding microstrip meander-line slow-wave structure (SWS) for traveling-wave tubes (TWTs) in this paper. The proposed structure evolves from a V-shaped winding microstrip meander-line. The radio-frequency characteristics of the above-mentioned structures are calculated. Numerical results from high frequency characteristics calculation are given and analyzed. It has...
A 2-dimensional (2-D) ring-bar microstrip meander-line for broad band miniaturization planar traveling-wave tubes (TWTs) has been proposed in this paper. Simulated by 3-D high frequency software, the cold band width of this 2-D ring-bar microstrip meander-line slow wave structure (SWS) is almost double that of the traditional U-shaped microstrip meander-line SWS at the same dimensions, which means...
In order to improve the output power of terahertz traveling-wave tubes (TWTs), a slow wave structure (SWS) named arbitrary staggered multi-vane slow wave structure is proposed in this paper. The SWS is suitable for the double sheet electron beams operation, and there is no coupling between the double electron beams. Based on this kind of SWS, a high-power 220 GHz TWT driven by the double electron...
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