Background The development of modern millimeter-wave communication has placed higher demands on key technical indicators of traveling-wave tubes (TWTs), such as operating frequency, output power, and efficiency.
Purpose To adapt to the development of next-generation satellite communications, this paper presents a study on a TWT with a rectangular-ring vertex double-bar (RRVDB) slow-wave structure (SWS) in the E-band.
Methods Based on a detailed analysis of the effects of the SWS parameters on high-frequency characteristics, optimized results with flat dispersion and high interaction impedance in the E-band were obtained.
Results PIC simulation results show that, under a beam voltage of 14200 V and an operating current of 0.2 A, the RRVDB TWT can provide a peak power of 228 W at 83 GHz, with corresponding gain and electronic efficiency of 33.6 dB and 8%, respectively, and the device's 3 dB bandwidth can reach 6 GHz (78.5～84.5 GHz).
Conclusions The above results indicate that the RRVDB TWT exhibits favorable development prospects as a high-frequency, high-power traveling-wave tube.
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