Design and experiment of high frequency circuit: fundamental wave gyroklystron amplifier with 34 GHz TE01 mode

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Design and experiment of high frequency circuit: fundamental wave gyroklystron amplifier with 34 GHz TE01 mode
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                        XU YongXU Yong
School of Physical Electronics,University of Electronic Science and Technology of China
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LUO YongLUO Yong
School of Physical Electronics,University of Electronic Science and Technology of China
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WANG Jian-XunWANG Jian-Xun
School of Physical Electronics,University of Electronic Science and Technology of China
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WANG LiWANG Li
School of Physical Electronics,University of Electronic Science and Technology of China
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PU You-LeiPU You-Lei
School of Physical Electronics,University of Electronic Science and Technology of China
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LI Hong-FuLI Hong-Fu
School of Physical Electronics,University of Electronic Science and Technology of China
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Affiliation:School of Physical Electronics,University of Electronic Science and Technology of China,School of Physical Electronics,University of Electronic Science and Technology of China,School of Physical Electronics,University of Electronic Science and Technology of China,School of Physical Electronics,University of Electronic Science and Technology of China,School of Physical Electronics,University of Electronic Science and Technology of China,School of Physical Electronics,University of Electronic Science and Technology of China
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Abstract:

he scattering matrix for the cavity with abrupt changes in radius in the gyroklystron was built with the mode-matching technique. The variations of the resonance characteristic of the cavity modes with the length and radius of the cavity have been studied. The cavities for input, bunching and output of the Ka-band TE01 mode in the gyroklystron have been designed and fabricated.The designed amplifier, as indicated by the PIC simulation, was expected to produce 390 kW peak output power, saturated gains of 42.9 dB and 50.6% efficiency at center frequency 34 GHz and 70kV, 11A annular electron beam. The full width half maximum (FWHM) bandwidth is greater than 360 MHz. The hot test shows that the fabricated gyroklystron amplifier has actually produced 301 kW peak output power, 39.1% efficiency and saturated gains of 41.8 dB at center frequency 34 GHz and 70 kV ,11 A annular electron beam . The full width half maximum (FWHM) bandwidth is greater than 285 MHz.

Key words:gyroklystron, beam and wave interaction, high power millimeter wave

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XU Yong, LUO Yong, WANG Jian-Xun, WANG Li, PU You-Lei, LI Hong-Fu. Design and experiment of high frequency circuit: fundamental wave gyroklystron amplifier with 34 GHz TE01 mode[J]. Journal of Infrared and Millimeter Waves,2013,32(6):531~537

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Received:July 25,2012
Revised:April 11,2013
Adopted:November 28,2012
Online: November 21,2013
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