Abstract
In this paper, a W-band traveling-wave tube (TWT) is proposed by combining the slotted sine waveguide (SSWG) slow-wave structure (SWS) with the cylindrical electron beam. The dispersion properties and interaction impedances of the SSWG SWS are analyzed by using the numerical simulation and compared to the conventional sine waveguide (SWG) SWS. The interaction impedances of the SSWG SWS are much higher than the SWG SWS over the entire operating frequency band. The whole high frequency system, which consists of the SSWG SWS, the coupler, and the attenuator, is designed suitably. From the particle-in-cell simulation results, the maximum output power of the SSWG TWT at the typical frequency of 94 GHz can reach 284.5 W with the cylindrical electron beam of 20.6 kV and 180 mA. Compared to the SWG TWT, the SSWG TWT possesses the higher beam–wave interaction efficiency and the shorter saturated tube length.
Highlights
W-band high-power radiation sources have significant applications in radar, space communication, imaging, and electronic counter measure.1–5 As one of the most important high-power radiation sources, the traveling-wave tube (TWT) can produce the considerable power output in the wide frequency band
In recent years, folded waveguide6,7 double corrugation rectangular waveguide,8 staggered double vane structure,9,10 sine waveguide (SWG),11–13 etc., have been used as the slow-wave structure (SWS) in the millimeter wave TWT. Among these SWSs, the sine waveguide (SWG) has the excellent transmission properties including low losses and reflection, and it is suitable for the sheet electron beam vacuum electronic devices
In order to improve the device performance of W-band TWT, the analysis of the slotted sine waveguide (SSWG) SWS in the forward wave region will be demonstrated in this paper
Summary
W-band high-power radiation sources have significant applications in radar, space communication, imaging, and electronic counter measure. As one of the most important high-power radiation sources, the traveling-wave tube (TWT) can produce the considerable power output in the wide frequency band. In recent years, folded waveguide double corrugation rectangular waveguide, staggered double vane structure, sine waveguide (SWG), etc., have been used as the SWSs in the millimeter wave TWT. Among these SWSs, the sine waveguide (SWG) has the excellent transmission properties including low losses and reflection, and it is suitable for the sheet electron beam vacuum electronic devices.. In order to improve the device performance of W-band TWT, the analysis of the slotted sine waveguide (SSWG) SWS in the forward wave region will be demonstrated in this paper. The analysis of the W-band SSWG TWT will be summarized
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