The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Un klystron de 5.3 GHz a été récemment conçu et fabriqué. Dans de nombreux pays, la fréquence d'émission de 5.6 GHz (5,600 5,650 à 5.3 5.3 MHz) est couramment utilisée pour les radars météorologiques en bande C. Cependant, la fréquence 5,250 GHz est généralement utilisée au Japon. Pour détecter les cisaillements de vent à basse altitude par un radar Doppler, il est essentiel d'utiliser un MOPA (Master Oscillator and Power Amplifier) qui génère des micro-ondes cohérentes et stables. Le klystron est le plus approprié à cet effet. Cependant, il n’existe pas de klystrons disponibles dans le commerce en bande C fonctionnant à 5,350 GHz. Nous avons développé un klystron pour cette bande, en utilisant une technique de simulation initialement conçue pour les bandes S et X. Le klystron fonctionne à des fréquences comprises entre 200 1 et 0.002 67 MHz. Les paramètres de fonctionnement typiques sont une puissance de sortie maximale de 40 kW, une largeur d'impulsion de 162 µs et un rapport cyclique RF de 20. Le klystron, y compris l'électro-aimant permettant de focaliser le champ magnétique, mesure environ XNUMX cm de long pour un diamètre de XNUMX cm et pèse XNUMX kg. La modulation de phase est supprimée en dessous de XNUMX % du changement de phase requis pour la résolution minimale de la mesure de vitesse Doppler par le radar pour lequel ce klystron est utilisé. Le klystron présente des performances favorables pour les radars Doppler exploités dans les principaux aéroports du Japon.
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Kyosuke HAMAZU, Kazuhisa HEMMI, Kazutaka HAYASHI, Hiroyuki HASHIGUCHI, Shoichiro FUKAO, "Development of a 5.3-GHz Klystron for a Pulsed Doppler Radar" in IEICE TRANSACTIONS on Communications,
vol. E85-B, no. 6, pp. 1152-1159, June 2002, doi: .
Abstract: A 5.3-GHz klystron has been recently designed and fabricated. In many countries, the transmitting frequency of 5.6 GHz (5,600 to 5,650 MHz) is commonly used for C-band meteorological radars. However, 5.3 GHz is generally used in Japan. To detect low-level wind shears by a Doppler radar, it is essential to use a MOPA (Master Oscillator and Power Amplifier) that generates stable coherent microwaves. The klystron is most suitable for this purpose. However, there are no commercially available klystrons in C-band that operate at 5.3 GHz. We developed a klystron for this band, making use of a simulation technique originally devised for S- and X-bands. The klystron operates at frequencies between 5,250 and 5,350 MHz. The typical operating parameters are a peak output power of 200 kW, a pulse width of 1 µs, and an RF duty cycle of 0.002. The klystron, including the electromagnet for focusing the magnetic field, is approximately 67 cm long with a diameter of 40 cm and a weight of 162 kg. Phase modulation is suppressed below 20% of the phase change required for the minimum resolution of Doppler velocity measurement by the radar for which this klystron is employed. The klystron shows favorable performance for Doppler radars operated in major airports in Japan.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e85-b_6_1152/_p
Copier
@ARTICLE{e85-b_6_1152,
author={Kyosuke HAMAZU, Kazuhisa HEMMI, Kazutaka HAYASHI, Hiroyuki HASHIGUCHI, Shoichiro FUKAO, },
journal={IEICE TRANSACTIONS on Communications},
title={Development of a 5.3-GHz Klystron for a Pulsed Doppler Radar},
year={2002},
volume={E85-B},
number={6},
pages={1152-1159},
abstract={A 5.3-GHz klystron has been recently designed and fabricated. In many countries, the transmitting frequency of 5.6 GHz (5,600 to 5,650 MHz) is commonly used for C-band meteorological radars. However, 5.3 GHz is generally used in Japan. To detect low-level wind shears by a Doppler radar, it is essential to use a MOPA (Master Oscillator and Power Amplifier) that generates stable coherent microwaves. The klystron is most suitable for this purpose. However, there are no commercially available klystrons in C-band that operate at 5.3 GHz. We developed a klystron for this band, making use of a simulation technique originally devised for S- and X-bands. The klystron operates at frequencies between 5,250 and 5,350 MHz. The typical operating parameters are a peak output power of 200 kW, a pulse width of 1 µs, and an RF duty cycle of 0.002. The klystron, including the electromagnet for focusing the magnetic field, is approximately 67 cm long with a diameter of 40 cm and a weight of 162 kg. Phase modulation is suppressed below 20% of the phase change required for the minimum resolution of Doppler velocity measurement by the radar for which this klystron is employed. The klystron shows favorable performance for Doppler radars operated in major airports in Japan.},
keywords={},
doi={},
ISSN={},
month={June},}
Copier
TY - JOUR
TI - Development of a 5.3-GHz Klystron for a Pulsed Doppler Radar
T2 - IEICE TRANSACTIONS on Communications
SP - 1152
EP - 1159
AU - Kyosuke HAMAZU
AU - Kazuhisa HEMMI
AU - Kazutaka HAYASHI
AU - Hiroyuki HASHIGUCHI
AU - Shoichiro FUKAO
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E85-B
IS - 6
JA - IEICE TRANSACTIONS on Communications
Y1 - June 2002
AB - A 5.3-GHz klystron has been recently designed and fabricated. In many countries, the transmitting frequency of 5.6 GHz (5,600 to 5,650 MHz) is commonly used for C-band meteorological radars. However, 5.3 GHz is generally used in Japan. To detect low-level wind shears by a Doppler radar, it is essential to use a MOPA (Master Oscillator and Power Amplifier) that generates stable coherent microwaves. The klystron is most suitable for this purpose. However, there are no commercially available klystrons in C-band that operate at 5.3 GHz. We developed a klystron for this band, making use of a simulation technique originally devised for S- and X-bands. The klystron operates at frequencies between 5,250 and 5,350 MHz. The typical operating parameters are a peak output power of 200 kW, a pulse width of 1 µs, and an RF duty cycle of 0.002. The klystron, including the electromagnet for focusing the magnetic field, is approximately 67 cm long with a diameter of 40 cm and a weight of 162 kg. Phase modulation is suppressed below 20% of the phase change required for the minimum resolution of Doppler velocity measurement by the radar for which this klystron is employed. The klystron shows favorable performance for Doppler radars operated in major airports in Japan.
ER -