The Magnetron as a Generator of Centimeter Waves

Fisk, J. B.; Hagstrum, H. D.; Hartman, Paul L.

doi:10.1002/j.1538-7305.1946.tb03612.x

Cited by 61 publications

(9 citation statements)

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“…Historically, the first microwave tube whose operation is based on Cherenkov's interaction was a magnetron [12]. The successful combination of properties of a multimode oscillating system of the magnetron and electronic processes occurring in its interaction space has allowed the magnetron to become one of the most effective microwave generators [13,14]. The constructions of magnetrons developed nowadays generate electromagnetic oscillations in the frequency range from 300 MHz to 300 GHz.…”

Section: Magnetronmentioning

confidence: 99%

“…Both pulsed and continuous magnetrons are widely used in different ground-based and on-board electronic systems, industrial and microwave household heating systems, physical experiments for plasma heating, and the acceleration of charged particles, as well as in the phased antenna grids and space systems of solar energy conversion to direct current energy (the system of wireless energy transmission to the earth). The miniaturization of the magnetron construction has allowed to reduce their weight to 100 g at the pulsed power of 1 kW and the efficiency of which achieves about 50% that is quite competitive with the best samples of modern transistor oscillators [10, [13][14][15][16][17][18][19][20].…”

Section: Magnetronmentioning

confidence: 99%

“…Concerning the existing trends of investigations, it is necessary to emphasize the problems of improvement of the cathode (emitter) operation of magnetrons. It is found (see, e.g., [13,14,21]) that the changes and instability of the cathode emission characteristics influence considerably the frequency stability of the magnetron. On the other hand, the disorder in the operation mode of the cathode connected with its overheat leads to essential reduction of durability of the cathode and the cathode node as a whole.…”

Section: Magnetronmentioning

confidence: 99%

“…where n ¼ 0, 1, 2, …,N=2 is the number of the fundamental mode (m ¼ 0); m ¼AE1, AE 2, AE 3, … is the integers corresponding to the high-order space harmonics. It is known (see, example, [13,14]) that the excitation condition of the resonant system of the magnetron (or so-called a condition synchronism) may be written as…”

Section: The Surface Wave Magnetronsmentioning

confidence: 99%

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Vacuum Microwave Sources of Electromagnetic Radiation

Churyumov¹,

Qiu²,

Wang³

2019

Electromagnetic Fields and Waves

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This chapter contains new simulation results concerning the physical foundations of how microwave tubes operate based on Cherenkov's mechanism of radiation (interaction with slow electromagnetic wave) and some experimental results connected with improving the output characteristics of the magnetrons (a mm band surface wave magnetron and a magnetron with two RF outputs of energy), as well as results of computer modeling of a 320-GHz band traveling wave tube (TWT). The results of analytical calculations and computer modeling, a phase bunching process in the mm band surface wave magnetron, are considered. It is shown that the process of phase focusing has two features associated with a concentration of RF wave energy close to the vanes of an anode block and higher electron hub of a space charge as compared to the classical magnetrons. The features and examples of practical application of the magnetron with two RF outputs of energy are presented. It is shown that the main advantage of the magnetrons is its extended functionalities (for example, possibility of frequency tuning including electronic tuning of a frequency from a pulse to pulse). The presented materials will be of interest not only for starting researchers but also for those who have microwave tube experience.

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Section: Magnetronmentioning

confidence: 99%

Section: Magnetronmentioning

confidence: 99%

Section: Magnetronmentioning

confidence: 99%

Section: The Surface Wave Magnetronsmentioning

confidence: 99%

See 2 more Smart Citations

Vacuum Microwave Sources of Electromagnetic Radiation

Churyumov¹,

Qiu²,

Wang³

2019

Electromagnetic Fields and Waves

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show abstract

“…The group velocity goes to zero as the width of the pass bands goes to zero, or as coupling between successive cavities vanishes with the closing of the holes in the irises. 4. Attenuation in the Guide.…”

Section: Introductionmentioning

confidence: 99%

The Design of Linear Accelerators

Slater

1948

Rev. Mod. Phys.

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Magnetrons

Osepchuk¹,

Ruden²

2005

Encyclopedia of RF and Microwave Engineering

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The magnetron has survived in an era when most electron tubes have been replaced by solid‐state devices in modern electronic systems. A wide spectrum of related devices are being developed for specialized applications. These include crossed‐field amplifiers, voltage‐tuned magnetrons, beacon magnetrons, and relativistic magnetrons. Applications range from the classical radar through industrial heating to microwave weapons. Future applications remain unpredictable, but many are being explored. Advances in computer modeling will eventually produce success.

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The Magnetron as a Generator of Centimeter Waves

Cited by 61 publications

References 0 publications

Vacuum Microwave Sources of Electromagnetic Radiation

Vacuum Microwave Sources of Electromagnetic Radiation

The Design of Linear Accelerators

Magnetrons

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