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    National Tsing Hua University Institutional Repository > 理學院 > 物理系 > 會議論文  >  Broadband design of slotted TE21 second harmonic gyrotron backward-wave oscillator

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/56277

    Title: Broadband design of slotted TE21 second harmonic gyrotron backward-wave oscillator
    Authors: Chen, N.C.;Chang, T.H.;Yu, C.F.
    教師: 張存續
    Date: 2007
    Publisher: Institute of Electrical and Electronics Engineers
    Relation: 2007 Joint 32nd International Conference on Infrared and Millimeter Waves and the 15th International Conference on Terahertz Electronics (IRMMW-THz), Cardiff, UK, 2-9 Sept. 2007, Pages 431
    Keywords: axial mode
    broadband design
    magnetic field
    mode selector
    second harmonic gyrotron backward-wave oscillator
    Abstract: Second harmonic gyrotron backward-wave oscillator (gyro-BWO) is a promising tunable source with only half the magnetic field requirement. But these merits have long been impeded by the transverse and axial modes competition as a result of lower efficiency. This study employs a slotted structure as a mode selector for suppressing the persistent low order transverse mode. In addition, an optimized two-step tapered structure is adopted to stabilize the high order transverse modes and axial modes. The interaction efficiency and the tuning bandwidth were greatly enhanced in the meanwhile. As a calculated result, a stable, ka-band, slotted second harmonic gyro-BWO is capable of producing an efficiency of 23% and a 3-dB tuning bandwidth of 9% at 5 A and 100 kV.
    URI: http://ieeexplore.ieee.org/iel5/4497233/4516365/04516566.pdf?arnumber=4516566
    Appears in Collections:[物理系] 會議論文

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