Research on Sub-Microsecond Compact L-Band Relativistic Cherenkov Oscillator

High power microwave (HPM) sources usually require a well-defined rectangular pulse waveform, which is especially true for the case of long pulse (>100 ns), stable, and high efficiency operation. Most long pulse HPM drivers are realized with pulse forming networks. This paper presents a long pulse driver composed of a conventional Marx generator and metal-oxide varistors (MOVs), utilizing the MOV’s nonlinear V–I characteristic. This method is easy to implement, and it has an additional benefit that the voltage can be stabilized even if the load’s impedance changes slightly. A low inductance zig-zag folding structure of the MOV is designed to decrease its size and self-inductance. An LC filter is used to reduce the energy loss in the MOV. In the experiment, a 400 kV, 800 ns long pulse is achieved at a foil-less electron diode, and longer than 300 ns HPM generation is obtained.

show abstract

Test of a multi-gigawatt, 800 ns high power microwave driver based on Marx generator and metal-oxide varistors

Yang

Gao

Zhang

et al. 2022

Review of Scientific Instruments

View full text Add to dashboard Cite

show abstract

Miniaturized and high-efficiency end-reflective coaxial cerenkov oscillator

Fan,

Zhang,

Cao

et al. 2024

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

High-power microwaves have extensive applications, but their practical implementation necessitates miniaturized and efficient devices. This paper introduces a novel miniaturized and highly efficient end-reflective coaxial Cerenkov device for high-power microwave generation. The design incorporates a coaxial collector structure that achieves total reflection of forward waves, significantly enhancing the end-feedback effect without increasing the structural length. Additionally, an integrated coaxial diffractive structure works synergistically with the strong end-feedback structure. This configuration not only enables highly efficient microwave output but also establishes a strong modulation field in the diode region, thereby facilitating effective electron beam modulation without extending the device length. Simulations demonstrate an output microwave power of 2.82 GW at 9.1 GHz, with a power conversion efficiency of 54%. Notably, the axial length of the beam-wave interaction region is only 2.6 λ, substantially shorter than that of conventional high-efficiency Cerenkov oscillators. The unique combination of the strong end-feedback coaxial structure and the coaxial diffractive output contributes to achieving both high efficiency and miniaturization in the generator.

show abstract

Digital Fabrication and Reliability Evaluation Method for G-Band TWT Electron Optical System

Wang

Luo

Fan

2023

IEEE Trans. Electron Devices

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Research on Sub-Microsecond Compact L-Band Relativistic Cherenkov Oscillator

Cited by 6 publications

References 26 publications

Test of a multi-gigawatt, 800 ns high power microwave driver based on Marx generator and metal-oxide varistors

Test of a multi-gigawatt, 800 ns high power microwave driver based on Marx generator and metal-oxide varistors

Miniaturized and high-efficiency end-reflective coaxial cerenkov oscillator

Digital Fabrication and Reliability Evaluation Method for G-Band TWT Electron Optical System

Contact Info

Product

Resources

About