Mixed-Modes Conversion Method for Dual-Mode Relativistic Backward-Wave Oscillators

Gui, Youyou; Xiao, Renzhen; Li, Jiawei; Shao, Hongxia; Shi, Yanchao; Zhang, Yuchuan; Song, Zhimin; Wang, Huida; Bai, Xianchen; Sun, Jun

doi:10.1109/lmwc.2021.3112625

Cited by 5 publications

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

High‐Power Microwave Sources

Prasad

2024

Encyclopedia of RF and Microwave Engineering

View full text Add to dashboard Cite

High‐power microwave (HPM) sources are at the heart of an HPM‐directed energy weapons (DEWs) system. Based on recent defense news articles seen in online magazines such as The Warzone , it is becoming more and more apparent that in the future the survival of a nation may depend on its DEW capability. This chapter provides a brief synopsis of a wide range of microwave tubes which are used for the generation of HPM signals. The chapter starts with a brief introduction on DEWs and their applications followed by a discussion on the basic building blocks of an HPM system. The sections that follow contain generalized physics of operation, frequency range, and output power capability of the following HPM tubes: magnetrons, backward wave oscillators (BWOs), klystrons, traveling wave tubes (TWTs), gyrotrons, virtual cathode oscillators (VCOs), magnetically insulated line oscillators (MILOs), transit time oscillators (TTOs), split cavity oscillators (SCOs), and reltrons. Of all the microwave tubes, the magnetron has been discussed in a little more detail because of its rich history. References have been provided for readers who wish to gain further knowledge in each area.

show abstract

High‐Power Microwave Sources

Prasad

2024

Encyclopedia of RF and Microwave Engineering

View full text Add to dashboard Cite

show abstract

High‐power Microwave Sources

Prasad

2024

Encyclopedia of RF and Microwave Engineering

View full text Add to dashboard Cite

High‐power microwave (HPM) sources are at the heart of an HPM‐directed energy weapons (DEWs) system. Based on recent defense news articles seen in online magazines such asThe Warzone, it is becoming more and more apparent that in the future the survival of a nation may depend on its DEW capability.This chapter provides a brief synopsis of a wide range of microwave tubes which are used for the generation of HPM signals. The chapter starts with a brief introduction on DEWs and their applications followed by a discussion on the basic building blocks of an HPM system. The sections that follow contain generalized physics of operation, frequency range, and output power capability of the following HPM tubes: magnetrons, backward wave oscillators (BWOs), klystrons, traveling wave tubes (TWTs), gyrotrons, virtual cathode oscillators (VCOs), magnetically insulated line oscillators (MILOs), transit time oscillators (TTOs), split cavity oscillators (SCOs), and reltrons. Of all the microwave tubes, the magnetron has been discussed in a little more detail because of its rich history. References have been provided for readers who wish to gain further knowledge in each area.

show abstract

Theoretical calculation and particle-in-cell simulation of a multi-mode relativistic backward wave oscillator operating at low magnetic field

et al. 2022

View full text Add to dashboard Cite

Increasing the dimensions of high power microwave devices is an efficient method to improve the power capacity. However, an overmoded structure usually results in mode competition and a low beam-wave conversion efficiency. In this paper, a multi-mode operation mechanism is used to avoid mode competition and increase the efficiency. The calculation results of nonlinear theory of beam-multimode interaction show that the optimized conversion efficiency is up to 48% when TM01 mode, TM02 mode, and TM03 mode are all considered. As only the TM01 mode, TM02 mode, or TM03 mode is taken into account independently, the corresponding efficiency is 38%, 22%, or 20%. Based on this, a multi-mode relativistic backward wave oscillator is proposed with the ratio of the mean diameter of the slow wave structure (SWS) to the wavelength of the output microwave to be 3.5. The non-uniform SWS is used to increase the beam-wave conversion efficiency, and a combined reflector is adopted to reflect partial of the mixed microwave modes and make the device compact. The particle-in-cell simulations show that as the diode voltage is 1.1 MV, the beam current is 22.8 kA, and the external magnetic field is 0.76 T, the conversion efficiency is 45%, and the output microwave of 11.3 GW is the mixed modes of TM01 mode, TM02 mode, and TM03 modes with the corresponding power ratio of 74%, 7%, and 19%, respectively.

show abstract

Mixed-Modes Conversion Method for Dual-Mode Relativistic Backward-Wave Oscillators

Cited by 5 publications

References 12 publications

High‐Power Microwave Sources

High‐Power Microwave Sources

High‐power Microwave Sources

Theoretical calculation and particle-in-cell simulation of a multi-mode relativistic backward wave oscillator operating at low magnetic field

Contact Info

Product

Resources

About