Origin of Sideband and Spurious Noises in Microwave Oven Magnetron

Baek, In‐Keun; Sattorov, Matlabjon; Bhattacharya, Ranajoy; Kim, Byungsu; Hong, Deokhwa; Min, Sun-Hong; Park, Gun-Sik

doi:10.1109/ted.2017.2714339

Cited by 9 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[20] Magnetron devices, however, are vulnerable to harmonic and frequent spiky noise compared to other microwave modules, resulting in the instability of the phase and the frequency. [21][22][23] Consequently, such shortcomings prevent magnetrons from being employed as unit sources of a phased array system forming a spatially confined energy beam and controlling the direction of the beam precisely to realize long distance wireless power transfer systems, including the SSPS targeting from the 36,000 km above to the diameter of 100 m. Therefore, it is necessary to study methodologies controlling and fixing the phase of magnetrons to the extent of the precision required for a phased array antenna. [24][25][26][27][28] In this paper, the authors report demonstrations on extreme stabilization of the phase and the frequency of an S-band magnetron by the injection locking to prove the feasibility of magnetrons to be employed as unit sources of a phasearrayed power-transfer system.…”

Section: Introductionmentioning

confidence: 99%

Noise Suppression and Precise Phase Control of a Commercial S-Band Magnetron

Han

Kim

et al. 2020

IEEE Access

View full text Add to dashboard Cite

We demonstrate noise suppression and precise phase control of a commercial 2.45GHz magnetron aiming for wireless power transfer application. The impurity of the microwave spectrum was confirmed to be due to the switching frequency of 76kHz in the power supply. With the decoupling capacitor installed to the output of the high-voltage power-supply driving the magnetron, the spectral purity of the magnetron was significantly enhanced. And we achieved extreme precision in phase-control (peakto-peak 0.3°) for the high-power (1 kW) microwave magnetron by applying the phase locking loop to the noise-suppressed magnetron system.

show abstract

Section: Introductionmentioning

confidence: 99%

Noise Suppression and Precise Phase Control of a Commercial S-Band Magnetron

Han

Kim

et al. 2020

IEEE Access

View full text Add to dashboard Cite

show abstract

“…It has been shown that thermal velocity spread may affect the magnetic insulation and lead to the onset of stationary states in the space charge limited regime, among other effects. [14][15][16][17][18] However, as a simplifying assumption, all the theoretical investigations done so far that include thermal effects neglect the self-magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

Space-charge and thermal effects in relativistic crossed-field devices

2018

View full text Add to dashboard Cite

In this paper, a fully kinetic theory for the relativistic electron flow in a crossed-field device is developed and analyzed. The theory takes into account self-electric, self-magnetic, and thermal effects and allows determining the final stationary state achieved by the electrons in phase-space. A number of different possible stationary modes are identified and described in detail. Particular attention is given to the study of how space charge and thermal effects affect the magnetic insulation when the external magnetic field exceeds the Hull cutoff field. In the nonrelativistic limit, it is found that there is only a single mode transition that leads to the loss of the magnetic insulation. This transition is completely independent of the electron density and occurs for relatively large injection temperatures. On the other hand, in a moderate relativistic regime a much richer scenario is found with the onset of a series of stationary state mode transitions as both electron density and injection temperature are varied. In particular, it is found that the transitions and the consequent loss of magnetic insulation may occur even at very low injection temperatures. Self-consistent numerical simulation results are also presented and used to verify the theoretical findings.

show abstract

Analysis of Electromagnetic Pulse Effects Under High-Power Microwave Sources

et al. 2021

View full text Add to dashboard Cite

High-power microwave sources applied to a directed-energy weapon can lead to permanent damage by radiating concentrated energy in a specific direction to disturb or overload electronic equipment. The effect analysis on the target, such as electronics exposed to electromagnetic pulse, should be considered as an important factor in determining the performance of high-power microwave sources and conducting experimental evaluations. In this study, a magnetically insulated transmission line oscillator, one of the representative high-power microwave sources based on vacuum electronics device, was constructed and experimental analysis with respect to electromagnetic pulse effects was performed. The specification of the magnetically insulated transmission line oscillator used in this study corresponded to 3 GW of high-power electromagnetic wave pulses operating at L-band. The power efficiency was approximately 10 -15%. For effective targeting, a Vlasov antenna that converts TM01 mode to TE11 mode was designed and fabricated. The radiation pattern was confirmed via fluorescent lamps, and to confirm the effect of the directed-energy weapon on the target, an effect analysis was performed using a portable electronic device as a sample. Furthermore, the electric field was measured with a D-dot probe and quantified and compared. This study presents a future blueprint of the value of the directed-energy weapon by predicting the radiant output power of the weapon in the far-field region after it is mounted on a movable ground vehicle or unmanned aerial vehicle.INDEX TERMS High power microwave (HPM), directed-energy weapon (DEW), electromagnetic pulse (EMP), magnetically insulated transmission line oscillator (MILO)

show abstract

Origin of Sideband and Spurious Noises in Microwave Oven Magnetron

Cited by 9 publications

References 11 publications

Noise Suppression and Precise Phase Control of a Commercial S-Band Magnetron

Noise Suppression and Precise Phase Control of a Commercial S-Band Magnetron

Space-charge and thermal effects in relativistic crossed-field devices

Analysis of Electromagnetic Pulse Effects Under High-Power Microwave Sources

Contact Info

Product

Resources

About