Study of a high-order mode terahertz backward wave ocsillator driven by multiple sheet electron beams

Shu, Guoxiang; Zhou, Changyu; Xiong, Hao; Chen, L.; Qian, Zhengfang; Liu, G.

doi:10.1109/ucmmt45316.2018.9015763

Cited by 1 publication

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared with the same type of terahertz source, the terahertz source designed in this paper has a lower voltage and current density in the same frequency band. For example, the voltage and current density of the terahertz source designed in this article is less than half of the rectangular corrugated waveguide terahertz source mentioned in [9], but the output power of the former far exceeds one-half of the power of the latter. This greatly reduces the requirements of the device for voltage source and bunching magnetic field, making the volume of magnet and device smaller.…”

Section: Discussionmentioning

confidence: 83%

“…In order to achieve a significantly higher output power at high operating frequency, a parallel multi-beam backward amplifier at 340 GHz based on the multi-pin rectangular waveguide SWS was proposed in [9]. In this paper, we plan to study a backward oscillator operating at the frequency above 500 GHz based on this schematic of multi-pin SWS and parallel multi-beam.…”

Section: Eigenmode Calculationmentioning

confidence: 99%

“…Based on the method of vacuum electronics, we designed a backward wave oscillator (BWO) with parallel multi-beam based on a novel slow-wave structure (SWS) composed of multiple parallel grating pins inside a quasirectangular waveguide [9]. The parallel multi-electron beam [10], [11] can highly decrease the operating current and current density compared to a single beam.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mode Competition of Low Voltage Backward Wave Oscillator near 500 GHz with Parallel Multi-Beam

Zhao,

Hu,

Zhang

et al. 2024

Chinese J. Elect.

View full text Add to dashboard Cite

A backward wave oscillator with parallel multiple beams and multi-pin slow-wave structure (SWS) operating at the frequency above 500 GHz is studied. Both the cold-cavity dispersion characteristics and CST Particle Studio simulation results reveal that there are obvious mode competition problems in this kind of terahertz source. Considering that the structure of the multi-pin SWS is similar to that of two-dimensional photonic crystals, we introduce the defects of photonic crystal with the property of filtering into the SWS to suppress high-order modes. Furthermore, a detailed study of the effect of suppressing higher-order modes is carried out in the process of changing location and arrangement pattern of the point defects. The stable, single-mode operation of the terahertz source is realized. The simulation results show that the ratio of the output peak power of the higher-order modes to that of the fundamental mode is less than 1.9%. Also, the source can provide the output peak power of 44.8 mW at the frequency of 502.2 GHz in the case of low beam voltage of 4.7 kV.

show abstract

Section: Discussionmentioning

confidence: 83%

Section: Eigenmode Calculationmentioning

confidence: 99%