Tunable magnetron of a two‐millimeter‐wavelength band

Naumenko, V. D.; Suvorov, A. N.; Sirov, Alexey

doi:10.1002/(sici)1098-2760(19960620)12:3<129::aid-mop3>3.3.co;2-c

Cited by 8 publications

(3 citation statements)

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“…Based on the well known scaling laws [39], these geometrical parameters have been determined from the corresponding parameters of a 28 cavity, 95 GHz (π/2 − 1-mode) SHM [37]. These dimensions are also close to that of a tunable 2 mm-wavelength-band SHM [38]. As will be presented in the next subsection, θ and d are selected in a way that they can provide maximum output power for the π/2−1-mode with a resonant frequency of about 140 GHz.…”

Section: Design Procedures and Simulation Modelmentioning

confidence: 99%

“…3). The total current in the SHMs is mainly due to secondary emission from a cold cathode, which is typically made of a copper core coated with a platinum foil [37,38]. In the SHMs, these cathodes are initialized by a bombarding current provided by an auxiliary thermionic cathode placed outside of the interaction space.…”

Section: Simulation Model In Cst-particle Studiomentioning

confidence: 99%

“…Another practical limitation of the π-mode scenario in the millimeter-wave band is the short life time of the thermionic cathode due to its high current density. This limitation has been successfully removed in SHMs by introducing a cold cathode instead of a thermionic one [37,38]. The advantages of SHMs over classical magnetrons can provide the possibility of extending the operating frequency of these devices to near THz and THz frequency ranges.…”

Section: Introductionmentioning

confidence: 99%

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DESIGN AND 3-D PARTICLE-IN-CELL SIMULATION OF A 140 GHz SPATIAL-HARMONIC MAGNETRON

Esfahani¹,

Tayarani²,

Schunemann³

2013

PIER

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Abstract-This paper discusses design procedure and 3-D numerical simulation of a 140 GHz spatial-harmonic magnetron (SHM). The well known scaling laws and an approximate approach based on single harmonic analysis are used to determine the interaction space dimensions and the optimum geometrical parameters of the side resonators. Numerical simulations of the SHM were performed using CST-Particle Studio. Since the simulations are not based on artificial RF priming or assuming restrictive assumptions on the mode of operation or on the number of harmonics to be considered, electromagnetic oscillations grow naturally from noise. The presented SHM shows stable operation in the π/2 − 1-mode at 140 GHz over a range of DC anode voltages extending from 11.3 kV to 11.5 kV and for an axial magnetic flux density equal to 0.79 T. Output power of the SHM varies from 2 kW to 11 kW over these voltages with a maximum efficiency of about 6.8%.

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Section: Design Procedures and Simulation Modelmentioning

confidence: 99%

Section: Simulation Model In Cst-particle Studiomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

DESIGN AND 3-D PARTICLE-IN-CELL SIMULATION OF A 140 GHz SPATIAL-HARMONIC MAGNETRON

Esfahani¹,

Tayarani²,

Schunemann³

2013

PIER

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Enhancing the natural frequency doublet splitting in almost periodic azimuthally corrugated cavities

Serebryannikov

Schuenemann²

2002

IEEE Microw. Wireless Compon. Lett.

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A symmetry of a corrugated periodic structure can be broken due to loading or/and fabrication defects so that frequency doublets may appear, whose frequencies are just slightly splitted. In this letter, we study the potentials to enhance this splitting by enhancing the asymmetry of the cavity. This is provided by a single (loaded) resonator which differs in its geometry from other resonators. The initial causes of the asymmetry are not taken into account. The used characteristic matrix equation is obtained by a mode-matching technique. It is shown that the doublet splitting can reach several percent due to a convenient choice of the geometry of the loaded resonator.

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