Mode conversion in a magnetron with axial extraction of radiation

Fuks, Mikhail; Kovalev, N. F.; Andreev, Andrey D.; Schamiloglu, E.

doi:10.1109/tps.2006.875770

Cited by 69 publications

(16 citation statements)

References 5 publications

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“…The S band MDO has the cathode radius of 1.58 cm, anode radius of 2.74 cm, resonant cavity radius of 4.74 cm and tapers the six cavities onto the output port of horn antenna with which TE31 mode could be radiated. 4 In numerical model, port I and port II in the MDO are located and shown in Fig. 8.…”

Section: Calculated Results and Pic Verificationmentioning

confidence: 99%

“…2, the microwave extraction of the MDO is modified from the radial direction to along the axis of the magnetron. This modification has lots of advantages: ͑1͒ it directly radiates microwaves in the axial direction; ͑2͒ it resists microwave breakdown and improves the output power and efficiency; 3,4 and ͑3͒ it minimizes the magnetic field volume. Furthermore, by changing the numbers of cavities in diffraction output section, different TE modes could be radiated.…”

Section: Introductionmentioning

confidence: 99%

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Choosing optimum method for the efficient design of a relativistic magnetron with diffraction output

Liu

2010

Journal of Applied Physics

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The relativistic magnetron with diffraction output (MDO) is promising to be the most compact narrow band high power microwave source. In this paper, based on the theory of S-parameters, a method named “choosing optimum” is proposed for the efficient design of the MDO in any wave band. By means of S-parameters, the π-TE31 mode conversion efficiencies of an S band MDO are calculated and then verified by three-dimensional particle-in-cell simulations. In order to illustrate the advantage of the choosing optimum method, the S-parameters of another L-band MDO are computed in a wide range of structure parameters and two results are chosen with detail information. Compared with the conventional method, the choosing optimum method is not only a shortcut, but also a convenient and easy way for choosing the high efficient MDOs in any wave band to meet the needs of different applications.

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Section: Calculated Results and Pic Verificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Choosing optimum method for the efficient design of a relativistic magnetron with diffraction output

Liu

2010

Journal of Applied Physics

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“…Depending on the output mode, the number of cavities that are to be tapered is determined. An A6 MDO operating in the π-mode can be made to radiate in TE 31 , TE 01 and TE 11 modes depending on the number of cavities tapered(6, 3 and 2 respectively) [2]. The MDO eliminates the shortcomings of the magnetron with radial extraction by allowing high power handling capacity, good azimuthal symmetry and compact magnetic coils.…”

Section: Introductionmentioning

confidence: 99%

Three dimensional particle-in-cell simulation study of Relativistic Magnetron with Diffraction Output in CST

Choudhury

Saini

Chhotray

2013

2013 International Conference on Microwave and Photonics (ICMAP)

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The A6 Relativistic Magnetron with Diffraction Output (MDO) with two cathode geometries have been investigated. The cathode radius of the magnetron structure has been decreased to make it operate in π-mode. The radiation from the magnetron is extracted axially by tapering onto a conical antenna only those cavities of the anode that correspond to the symmetry of the radiated modes. CST Electromagnetic finitedifference-time domain Particle-In-Cell (PIC) code has been used to simulate the structure. With an input voltage of 240kV, the magnetic field has been varied to maximize the output RF voltage amplitude.

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“…[1][2][3][4] The relativistic magnetron with diffraction output (MDO), [5][6][7][8][9][10][11] known as magnetron with axial radiation, is a promising device to be the most compact narrow band high power microwave (HPM) source. Compared with the traditional relativistic magnetron with radial extraction, the MDO not only succeeds the advantages such as simple structure and high efficiency but also has other special attractive features such as good azimuthal symmetry, compact magnetic coils, and directly radiating microwave in the axial direction.…”

Section: Introductionmentioning

confidence: 99%

Experimental demonstration of a compact high efficient relativistic magnetron with directly axial radiation

Liu

Shu

et al. 2012

Physics of Plasmas

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A compact relativistic magnetron with axial microwave radiation is experimentally investigated. Under the modified magnetic field distribution, only connecting a special horn antenna in the axial direction, the relativistic magnetron can stably radiate high power and high efficiency microwaves. The total length of the device is $0.3 m, and the volume is $0.014m 3 . In such working condition that the applied voltage is 539 kV and the magnetic field is $0.38 T, the output microwave power is $1.24 GW. Correspondingly, the total efficiency is about 34.1%. The radiating frequency is 2.35GHz, which is in agreement with the p mode frequency of the theoretical expectation.

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Mode conversion in a magnetron with axial extraction of radiation

Cited by 69 publications

References 5 publications

Choosing optimum method for the efficient design of a relativistic magnetron with diffraction output

Choosing optimum method for the efficient design of a relativistic magnetron with diffraction output

Three dimensional particle-in-cell simulation study of Relativistic Magnetron with Diffraction Output in CST

Experimental demonstration of a compact high efficient relativistic magnetron with directly axial radiation

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