A Novel Cold Cathode Design for S-Band Continuous-Wave Magnetron

Hu, Kongyi; Tang, Wanchun; Feng, Linping; Zhang, Baoqing; Jiang, Yan; He, Xi; Liu, Jianlong

doi:10.1109/ted.2021.3109218

Cited by 6 publications

References 15 publications

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Cathodes in magnetrons: A review

Liu,

Yang,

Sun

et al. 2024

MetalMat

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Magnetron is currently one kind of the most widely used vacuum electronic devices. The cathode, as the electronic source of the device, is the core of magnetrons. With the development of magnetrons, the requirements for cathode performance are also increasing, including thermal electron emission and secondary electron emission performance. This article reviews the development history of cathodes used in magnetrons, discusses the performance and application fields of various cathodes, and the relationship between performance and structure. However, there are still certain problems with various cathode materials that make it difficult to truly cover all magnetrons. The ongoing challenges relating to the magnetron cathodes have been discussed in this paper.

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Cathodes in magnetrons: A review

Liu,

Yang,

Sun

et al. 2024

MetalMat

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Surface plasmon-mediated enhanced field electron emission based on metasurfaces with a nano-gap driven by LEDs

Zhao

Liu

Jiang

et al. 2023

Applied Physics Letters

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Vacuum electronic devices have the advantages of no scattering, anti-irradiation, and extreme operating temperatures. With their superiorities, light-assisted field emission can be utilized to drive ultrafast micro-/nano-vacuum electronic devices. However, traditional multiphoton or optical field emission is limited by the access of the lasers with high power and energy. In this Letter, an asymmetric non-semiconductor nanostructure may be applied to reduce cost with a nano-level gas or vacuum channel. We find that the basic LED may be a candidate to enhance the electron emission current by utilizing the multi-stage field enhancement consisting of tip effects and plasmon-based enhancement. By designing a field electron emission device with LEDs in standard atmospheric environment, we realize a 25% increase in field electron emission current at the resonance frequency with the light intensity under W cm−2 and the voltage less than 5 V. By comparing with lasers, simple LEDs are beneficial to increase the scope of applications with low-energy requirements. Meanwhile, the structure paves the way to the application of microelectronic and nano-electronic components in the on-chip electronic devices, such as switches and modulators.

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