System study using injection phase locked magnetron as an alternative source for superconducting radio frequency accelerator

Wang, Haipeng; Plawski, Tomasz; Rimmer, Robert; Tahir, I.; Neubauer, M.; Dudas, Alan

doi:10.1109/ivec.2014.6857680

Cited by 5 publications

(2 citation statements)

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“…A magnetron is a competitive source satisfying both of the requirements, (a) to reduce launch costs and (b) to maximize energy utilization and to minimize thermal loss, among various microwave modules [13]- [15]. To employ the magnetron as a unit source of a phased array system forming a spatially confined energy beam and controlling the direction of the beam precisely, researchers including the authors have studied methodologies controlling and fixing the phase and frequency of a magnetron to the extent of the precision required for a phased array antenna or a linear accelerator overcoming the critical and inherent shortcomings of magnetrons [16]- [22].…”

Section: Introductionmentioning

confidence: 99%

Suppression of a Long-Term Instability of a Commercial Magnetron With Low-Ripple DC Power Supply for Heater

Kim

Jang

et al. 2022

IEEE Access

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Compact but powerful and efficient magnetrons are in service for various high-power microwave applications owing to their additional superiority of low-cost mass production. However, the magnetron's inherent instability in frequency and phase over a relatively wide spectrum limits the versatile availability of the magnetron for possible advanced applications, including a long-distance wireless power transfer system (WPTS) that employs the magnetron as a unit source of a phased array system. The authors present a methodology suppressing a long-term instability of the S-band commercial magnetron harnessed by the phase-locking-loop (PLL) injection controlling and fixing the phase and frequency of the magnetron to the extent of the precision for a WPTS. The long-term drift of the phase exactly replicating the anode voltage fluctuations is successfully suppressed by the implementation of a DC power supply to compensate the cooling effects of the heater, which contributes to extreme stabilization of the phase (peak to peak 0.2 • ) for high-power (1kW). And eligibility for the unit source of a phase-arrayed WPTS is proven by varying the output power while maintaining the phase at a constant.INDEX TERMS Magnetrons, noise, phase-locking-loop (PLL), series parallel resonant converter (SPRC), cooling effect.

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Section: Introductionmentioning

confidence: 99%

Suppression of a Long-Term Instability of a Commercial Magnetron With Low-Ripple DC Power Supply for Heater

Kim

Jang

et al. 2022

IEEE Access

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“…[15][16][17][18][19] In addition, capital cost of a magnetron is superior compared to other high-power microwave modules. [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.…”

Section: Introductionmentioning

confidence: 99%

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

Han

Kim

et al. 2020

IEEE Access

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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.

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