Towards coherent combining of X-band high power microwaves: phase-locked long pulse radiations by a relativistic triaxial klystron amplifier

J Ju, J Zhang, Z Qi, J Yang, T Shu, J Zhang… - Scientific Reports, 2016 - nature.com
J Ju, J Zhang, Z Qi, J Yang, T Shu, J Zhang, H Zhong
Scientific Reports, 2016nature.com
The radio-frequency breakdown due to ultrahigh electric field strength essentially limits
power handling capability of an individual high power microwave (HPM) generator and this
issue becomes more challenging for high frequency bands. Coherent power combining
therefore provides an alternative approach to achieve an equivalent peak power of the order
of∼ 100 GW, which consequently provides opportunities to explore microwave related
physics at extremes. The triaxial klystron amplifier (TKA) is a promising candidate for …
Abstract
The radio-frequency breakdown due to ultrahigh electric field strength essentially limits power handling capability of an individual high power microwave (HPM) generator and this issue becomes more challenging for high frequency bands. Coherent power combining therefore provides an alternative approach to achieve an equivalent peak power of the order of ∼100 GW, which consequently provides opportunities to explore microwave related physics at extremes. The triaxial klystron amplifier (TKA) is a promising candidate for coherent power combing in high frequency bands owing to its intrinsic merit of high power capacity, nevertheless phase-locked long pulse radiation from TKA has not yet been obtained experimentally as the coaxial structure of TKA can easily lead to self-excitation of parasitic modes. In this paper, we present investigations into an X-band TKA capable of producing 1.1 GW HPMs with pulse duration of about 103 ns at the frequency of 9.375 GHz in experiment. Furthermore, the shot-to-shot fluctuation standard deviation of the phase shifts between the input and output microwaves is demonstrated to be less than 10°. The reported achievements open up prospects for accomplishing coherent power combining of X-band HPMs in the near future and might also excite new development interests concerning high frequency TKAs.
nature.com
以上显示的是最相近的搜索结果。 查看全部搜索结果