A frequency-agile relativistic magnetron with axial tuning

A frequency-agile relativistic magnetron with axial tuning is presented. To achieve axial tuning, reentrant cavity which has two radial parts connected by a coupling hole had been introduced. Resonant frequency of this cavity configuration can be tuned by adjusting the axial length of each coupling...

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Bibliographic Details
Published in:IEEE electron device letters 2020-05, Vol.41 (5), p.1-1
Main Authors: Qin, Fen, Zhang, Yong, Xu, Sha, Lei, Lu-rong, Ju, Bin-quan, Wang, Dong
Format: Article
Language:English
Subjects:
Anodes
axial tuning
Cathodes
Coupling
Couplings
High power microwave
Magnetic resonance
Microwave theory and techniques
multi-antenna output
reentrant cavity
Relativistic effects
relativistic magnetron
Resonant frequencies
Tuning
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Summary:A frequency-agile relativistic magnetron with axial tuning is presented. To achieve axial tuning, reentrant cavity which has two radial parts connected by a coupling hole had been introduced. Resonant frequency of this cavity configuration can be tuned by adjusting the axial length of each coupling hole without any variation of other parameters. Multi-antenna output technique had been integrated with the reentrant cavity chain to obtain high conversion efficiency in the whole tuning range. Simulation results showed that this tube had a tuning range between 1.23 GHz to 1.70 GHz, corresponding to relative bandwidth of 32% about a center frequency of 1.465 GHz. In this tuning range, the maximum output power is 1.81 GW at 1.605 GHz, corresponding to an efficiency of 54.5%. This axial tuning RM is a promising compact high power microwave source with wide tuning range.
ISSN:0741-3106
1558-0563
DOI:10.1109/LED.2020.2984096