Tractable Resonant Circuit With Two Nonuniform Beams for a High-Power 0.22-THz Extended Interaction Oscillator

In vacuum electronics, the influence of the uniformity of electron beams on the performance of two- or multi-beam devices is a key scientific problem in the development of compact, high power millimeter-wave and terahertz (THz) sources. In this letter, we focus on this problem in extended interactio...

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Bibliographic Details
Published in:IEEE electron device letters 2021-06, Vol.42 (6), p.931-934
Main Authors: Bi, Liangjie, Yin, Yong, Wang, Bin, Li, Hailong, Peng, Ruibin, Xu, Che, Qin, Yu, Meng, Lin
Format: Article
Language:English
Subjects:
Circuit design
Circuits
distributed beam
Electromagnetic properties
Electromagnetics
Electron beams
Electrons
Extended interaction oscillator (EIO)
high order mode
Integrated circuit modeling
Millimeter wave circuits
Millimeter waves
Oscillators
Particle in cell technique
RLC circuits
Simulation
Surface waves
Terahertz frequencies
Vacuum electronics
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Summary:In vacuum electronics, the influence of the uniformity of electron beams on the performance of two- or multi-beam devices is a key scientific problem in the development of compact, high power millimeter-wave and terahertz (THz) sources. In this letter, we focus on this problem in extended interaction oscillators (EIOs) and propose a tractable extended resonant circuit that has no requirement for the uniformity of beams. The circuit design builds up a TM 13 mode mechanism to support two nonuniform beams, based on maintaining the same electromagnetic characteristics of conventional resonant circuits used in single-beam EIOs. To verify this idea, we designed and simulated a 0.22-THz EIO with the proposed circuit. As the current of one beam is I 1 and that of another beam is increased from 0 to 4I 1 , the EIO has shown the behavior of linearly increasing the output power and then becoming saturated through particle-in-cell (PIC) simulations. The ideal case is the currents of the two beams are the same at the same voltage to drive the EIO. This case can reduce the high current density required for start oscillation in single-beam EIOs and obtain high power. Simulation results show that the power of 0.22-THz wave over 1.32 kW is obtained using double beams at 22.2 kV and each current of 0.25 A.
ISSN:0741-3106
1558-0563
DOI:10.1109/LED.2021.3072848