Theoretical investigation of the fundamental mode frequency of A6 magnetron

Fan, Yuwei; Liu, Jing; Zhong, Hui-Huang; Shu, Ting; Li, Zhiqiang

doi:10.1063/1.3116202

Cited by 21 publications

(8 citation statements)

References 10 publications

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“…In [10], theoretical formula for π-mode frequency based on equivalent circuit method has been derived as a function of structure dimensions. Also, in [1] equivalence of admittance of the resonator vanes and anode–cathode (AK) cylindrical gap region is used to obtain resonant frequency for various modes of magnetron operation.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Comparative analysis of radial and axial power output in relativistic magnetron and effect of dielectric side-walls introduced in the resonator on dominant operating mode

Saxena¹,

Barakade²,

Singh³

et al. 2014

Int. J. Microw. Wireless Technol.

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A comparative analysis of radiated power in relativistic magnetron is done using particle-in-cell simulations performed on Magic3d code developed by ATK Mission Systems. The Resonator with dielectric side-walls (DSW) is compared with no-side wall (NSW) configuration having same input parameters and resonator dimensions. Observations and comments have been made on the output power, obtained both axially and radially, taking into consideration π as well as 2π modes of operation for both configurations. The DSW assist in π-mode operation at 3.3 GHz and delivers radial peak power output of ~2.5 GW, which is more than ~1.5 GW, the radial peak power for the NSW case. The NSW case operates in dominant 2π mode (radially) at 5.68 GHz with axial power radiated at dominant π-mode frequency. The electron kinetic energies and their distribution in the cavity are discussed together with the dynamic behavior of particles, which result in spokes formation.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Comparative analysis of radial and axial power output in relativistic magnetron and effect of dielectric side-walls introduced in the resonator on dominant operating mode

Saxena¹,

Barakade²,

Singh³

et al. 2014

Int. J. Microw. Wireless Technol.

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“…These three methods are all difficult to get an exact expression of the resonance frequency as a function of structure dimensions. Equivalent circuit method can obtain a resonance frequency's formula as a function of structure dimensions, and it can also help to analyze the effects of structure dimensions on resonance frequency of magnetrons [12]- [16]. Both the magnetron with hole-and-slot cavities and magnetron with sector cavities are analyzed by equivalent circuit method [12], [16].…”

Section: Introductionmentioning

confidence: 99%

“…Equivalent circuit method can obtain a resonance frequency's formula as a function of structure dimensions, and it can also help to analyze the effects of structure dimensions on resonance frequency of magnetrons [12]- [16]. Both the magnetron with hole-and-slot cavities and magnetron with sector cavities are analyzed by equivalent circuit method [12], [16]. However, for magnetron with sector-and-slot cavities, the surface current is not uniform and it is also not linear in whole cavity.…”

Section: Introductionmentioning

confidence: 99%

Equivalent Circuit Method of Resonant System of Magnetron With Sector-and-Slot Resonant Cavities

Yue

Zhang

Gao

2014

IEEE Trans. Plasma Sci.

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In this paper, the equivalent capacitance and inductance of sector-and-slot resonant cavities are investigated theoretically by the equivalent circuit method. Thereby, the expression of the resonance frequency is obtained as a function of structure dimensions. In addition, the effects of structure dimensions on equivalent capacitance, inductance, and π-mode frequency are analyzed numerically, especially the slot width, slot length, and height. The results show that, compared with field theory, the equivalent circuit method is in more consistent with the simulation results, which verifies the validity of the equivalent circuit method. With the given structure dimensions, the equivalent capacitance increases with the increasing of slot length and height or the decreasing of slot width, while the equivalent inductance is opposite. Therefore, the change tendency of resonance frequency is determined by the relative changes of the capacitance, inductance, and coupling capacitance. This method can help to predesign and analyze resonant system of magnetrons with sector-and-slot resonant cavities efficiently.Index Terms-Equivalent circuit method, magnetron, resonant frequency, sector-and-slot resonant cavities.

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“…3 There are other approaches being actively pursued to improve magnetron performance. [4][5][6][7][8][9] The researchers in Ref. 4, in particular, studied an inverted relativistic magnetron that eliminated the problem of end-loss current.…”

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confidence: 99%

rf mode switching in a relativistic magnetron with diffraction output

Liu

Michel

Prasad

et al. 2010

Applied Physics Letters

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The relativistic magnetron with diffraction output (RMDO) has demonstrated nearly 70% efficiency in recent simulations. This letter reports a rapid mode switching technique in the RMDO using a low power, short-pulse, external single frequency signal. The MAGIC electromagnetic finite-difference-time-domain particle-in-cell code used in simulations demonstrated that an input signal of 300 kW is sufficient to switch neighboring modes in a gigawatt output power A6 RMDO with a transparent cathode, whereas for the original A6 magnetron configuration with radial extraction driven by a transparent cathode 30 MW is required. This frequency agility adds additional versatility to this high power microwave source.

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Theoretical investigation of the fundamental mode frequency of A6 magnetron

Cited by 21 publications

References 10 publications

Comparative analysis of radial and axial power output in relativistic magnetron and effect of dielectric side-walls introduced in the resonator on dominant operating mode

Comparative analysis of radial and axial power output in relativistic magnetron and effect of dielectric side-walls introduced in the resonator on dominant operating mode

Equivalent Circuit Method of Resonant System of Magnetron With Sector-and-Slot Resonant Cavities

rf mode switching in a relativistic magnetron with diffraction output

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