Theoretical Analysis and PIC Simulation of a 220-GHz Second-Harmonic Confocal Waveguide Gyro-TWT Amplifier

An, Chenxiang; Zhang, Dian; Zhang, Jun; Zhong, Huihuang

doi:10.1109/ted.2019.2925895

Cited by 5 publications

(1 citation statement)

References 14 publications

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“…For example, future time-domain dynamic nuclear polarization (DNP) nuclear magnetic resonance (NMR) spectroscopy methods will require broadband high-power microwave sources at frequencies of 250 GHz and above [1], [2]. While first prototypes have been successfully demonstrated [3], their development is still part of current research [4], [5]. A promising candidate are gyrotron traveling wave tubes with a helically corrugated interaction space (H-GTWTs) [6]- [9].…”

Section: Introductionmentioning

confidence: 99%

New Type of Sub-THz Frequency-Doubling Gyro-TWT With Helically Corrugated Circuit

Marek

Feuerstein

Illy

et al. 2022

IEEE Electron Device Lett.

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A novel type of frequency doubling gyrotron traveling wave amplifier (FD-GTWT) for applications that require high-power microwave in the sub-THz frequency range is presented. The proposed FD-GTWT delivers high power and high gain over a broad bandwidth and simultaneously doubling the frequency of the input signal. Simulations of a first 263 GHz FD-GTWT design are presented, which show for a 10 mW driving signal at 131.5 GHz an RF output power of 250 W at 263 GHz and a gain of >40 dB over a bandwidth of 17.5 GHz. The basis of the FD-GTWT are two interaction circuits separated by a long drift section. In the first circuit, the electron beam is pre-bunched at the fundamental cyclotron harmonic. In the second one, highpower RF is induced by the pre-bunched electron beam at the 2nd cyclotron harmonic. Both sections consist of helically corrugated waveguides that efficiently suppress parasitic interactions and allow broad bandwidth.

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Section: Introductionmentioning

confidence: 99%

New Type of Sub-THz Frequency-Doubling Gyro-TWT With Helically Corrugated Circuit

Marek

Feuerstein

Illy

et al. 2022

IEEE Electron Device Lett.

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Chaotic signal generation in a CW K-band gyro-TWT with strong output reflections

et al. 2023

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We experimentally study the dynamics of a K-band continuous wave gyro-resonant traveling wave tube (gyro-TWT) with strong output reflections. By varying system parameters, we have obtained transitions from periodic self-modulation regimes with line spectra to more complex oscillation regimes. We present the analysis of experimental data verifying the experimental observation of chaotic oscillation regimes. We have shown that chaotic oscillation regimes emerge in a fairly narrow parameter area, about 0.5% of magnetic field strength and about 10% of reflectivity. Maximum oscillation power reaches 0.5 kW at about 2% efficiency. For a gyro-TWT with output reflections operating in the CW mode, the chaotic oscillations are being experimentally observed and systematically analyzed for the first time.

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Design and Simulation Investigations of W-Band Second Harmonic Periodically Dielectric-Loaded Gyro-TWT

Akash

Thottappan

2021

IETE Technical Review

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Theoretical Analysis and PIC Simulation of a 220-GHz Second-Harmonic Confocal Waveguide Gyro-TWT Amplifier

Cited by 5 publications

References 14 publications

New Type of Sub-THz Frequency-Doubling Gyro-TWT With Helically Corrugated Circuit

New Type of Sub-THz Frequency-Doubling Gyro-TWT With Helically Corrugated Circuit

Chaotic signal generation in a CW K-band gyro-TWT with strong output reflections

Design and Simulation Investigations of W-Band Second Harmonic Periodically Dielectric-Loaded Gyro-TWT

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