Simulation of a 0.2 THz second-harmonic multiplier with sheet electron beam

Karetnikova, Tatiana A.; Ryskin, Nikita M.; Belov, Kirill V.; Ploskih, Andrey E.

doi:10.1109/ucmmt.2017.8068466

Cited by 1 publication

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although semiconductor THz sources can produce high-power output up to milliwatt, they are usually troubled by over-high upfront cost. As a compromise, vacuum electronic devices (VEDs) may deliver higher output power with lower cost [1][2][3][4][5][6][7]. In 2004, a kind of compact THz free electron laser device was introduced by Stuart R A, with 1 kW pulsed power from 0.3 THz to 3 THz [8].…”

Section: Introductionmentioning

confidence: 99%

Novel Dual Beam Cascaded Schemes for 346 GHz Harmonic-Enhanced TWTs

et al. 2021

View full text Add to dashboard Cite

The applications of terahertz (THz) devices in communication, imaging, and plasma diagnostic are limited by the lack of high-power, miniature, and low-cost THz sources. To develop high-power THz source, the high-harmonic traveling wave tube (HHTWT) is introduced, which is based on the theory that electron beam modulated by electromagnetic (EM) waves can generate high harmonic signals. The principal analysis and simulation results prove that amplifying high harmonic signal is a promising method to realize high-power THz source. For further improvement of power and bandwidth, two novel dual-beam schemes for high-power 346 GHz TWTs are proposed. The first TWT is comprised of two cascaded slow wave structures (SWSs), among which one SWS can generate a THz signal by importing a millimeter-wave signal and the other one can amplify THz signal of interest. The simulation results show that the output power exceeds 400 mW from 340 GHz to 348 GHz when the input power is 200 mW from 85 GHz to 87 GHz. The peak power of 1100 mW is predicted at 346 GHz. The second TWT is implemented by connecting a pre-amplification section to the input port of the HHTWT. The power of 600 mW is achieved from 338 GHz to 350 GHz. The 3-dB bandwidth is 16.5 GHz. In brief, two novel schemes have advantages in peak power and bandwidth, respectively. These two dual-beam integrated schemes, constituted respectively by two TWTs, also feature rugged structure, reliable performance, and low costs, and can be considered as promising high-power THz sources.

show abstract