High Power Microwaves

Swegle, John A.; Schamiloglu, E.; Benford, James

doi:10.1201/9781420012064

Cited by 720 publications

(351 citation statements)

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“…The virtual cathode oscillators have been built in two basic geometries. In one configuration, the microwave extraction is perpendicular to the electron beam (radial extraction), and the other configuration is axially symmetric, the microwave power is extracted in the same direction as the electron beam (axial extraction) [4,5,7]. The tunability of the radiation frequencies in virtual cathode oscillator can be achieved by changing the anode-cathode gap spacing, cathode dimensions and shape, and anode voltage with respect to cathode voltage [19].…”

Section: Introductionmentioning

confidence: 99%

“…This device is based on a special class of the bremsstrahlung radiation of the relativistic electrons oscillating axially in the electrostatic fields [4,5]. The virtual cathode oscillators have been built in two basic geometries.…”

Section: Introductionmentioning

confidence: 99%

“…Among the several types of pulsed high-power microwave generators, the virtual cathode oscillator has been considered very attractive because of its conceptual and mechanical simplicity, high output power capability [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] and possible wide-bandwidth with frequency tunable characters which make it attractive for applications where the highpower and wide-bandwidth is acceptable. This device is based on a special class of the bremsstrahlung radiation of the relativistic electrons oscillating axially in the electrostatic fields [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…It does not necessarily need the external applied magnetic field, eliminating the magnetic coils and their power supply which greatly saves volume, weight and cost [10]. It has potential to generate microwaves power ranging from few tens of MW up to a few tens GW in the centimeter to millimeter wavelength range [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…The system with a virtual cathode can thus be used to develop new highpower, genuinely high-current relativistic microwave devices. One of the devices of this kind is the virtual cathode oscillator [2][3][4][5]. The high-power microwaves sources are being developed for applications in controlled nuclear fusion plasma heating, high energy particle accelerator, radar, and many other industrial and military.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Feasibility Study of Axially- Extracted Virtual Cathode Oscillator

Singh

Kartikeyan

2007

Int J Infrared Milli Waves

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In this paper, we have analyzed the design parameters of the axially -extracted virtual cathode oscillator, which is high-power microwave source based on the concept of the virtual cathode associated with the intense relativistic electrons beam oscillations in the electrostatic potential well. The microwave emission by the virtual cathode oscillator results from both the space and time oscillations of virtual cathode and reflexing electrons trapped in the potential well between the virtual and real cathodes. In the X-band frequency spectrum 700 MW microwave peak power has been obtained analytically by the solid electron beam of 300 kV and 20 kA for feasible design parameters. The analysis has been performed by 2-dimensional, relativistic, electromagnetic particle-in-cell simulation code XOOPIC.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Feasibility Study of Axially- Extracted Virtual Cathode Oscillator

Singh

Kartikeyan

2007

Int J Infrared Milli Waves

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High‐power microwave generation by double‐anode virtual cathode oscillator

Nagao

Takatsu

Thuan

et al. 2020

Electrical Engineering Japan

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The virtual cathode oscillator (vircator) is one of the promising devices to oscillate high‐power microwaves. Simplicity and high‐power capability are advantages. However, the low efficiency and frequency stability are serious problems. In this article, we dealt double anode to strengthen the microwave interactions. The measurement result shows that the output of the virtual cathode oscillator can be progress by using the double‐anode.

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Dispersion characteristics and electromagnetic properties of semicircularly corrugated slow‐wave structure for backward‐wave oscillators

Al‐Amin

Amin

Sagor

2018

Int J Numerical Modelling

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The dispersion relation of semicircularly corrugated slow‐wave structure (SCCSWS) is calculated and verified numerically using synthetic technique. The metallic periodic structure resonates at discrete frequencies when both ends of it are shorted and excited properly. From the discrete frequencies of the axial modes of the resonant cavity, continuous dispersion curve for both the fundamental and the higher order passband modes (TM01‐TM03) are generated. The generated dispersion curve is compared with the analytical results, which agree excellently with a maximum deviation of 1.33% for TM01 mode, 1.94% for TM02 mode, and 1.30% for TM03 mode. The electromagnetic field patterns of SCCSWS in both radial and axial direction are also calculated and compared with analytical field patterns. Comparative results validate both the obtained dispersion relation and field patterns of SCCSWS, which can be employed as viable alternative of the existing slow‐wave structure (SWS) in high‐power microwave devices.

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High Power Microwaves

Cited by 720 publications

References 0 publications

Feasibility Study of Axially- Extracted Virtual Cathode Oscillator

Feasibility Study of Axially- Extracted Virtual Cathode Oscillator

High‐power microwave generation by double‐anode virtual cathode oscillator

Dispersion characteristics and electromagnetic properties of semicircularly corrugated slow‐wave structure for backward‐wave oscillators

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