A Broadband Convoluted TWT High Frequency Structure
A high-frequency structure and traveling wave tube technology, applied in the millimeter wave and terahertz fields, can solve the problems of limited device bandwidth and failure to meet the comprehensive index requirements of high power, wide frequency band and high efficiency of system equipment, and achieve reduced design Effects of Time and Computational Costs
Active Publication Date: 2022-03-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0003] The high-frequency circuit is the place where the electron beam and the electromagnetic wave (referred to as "beam-wave") interact and transduce energy. The nonlinear high-frequency circuit of the traditional cyclotron traveling wave tube is a uniform smooth waveguide, and the inherent dispersion characteristics of the waveguide determine the electromagnetic wave. It can only strongly interact with electrons in a narrow band, resulting in limited device bandwidth; the maximum 1dB relative bandwidth of a hundred-kilowatt class gyrotraveling wave tube in the world is about 7% (S.V.Samsonovet al., IEEE Trans.Electron Devices, vol.61 , no.12, pp.4264-4267, Dec.2014), far from meeting the comprehensive index requirements of high power, broadband and high efficiency of system equipment
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[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0022] The present invention provides a high-frequency structure of a broadband convoluted traveling wave tube, the design principle of which is as follows:
[0023] Based on the moving electron coordinate system, in-depth analysis of the physical process of energy conversion, it is found that the root cause of the inability of electromagnetic waves and electrons to perform wide-band energy conversion is: the electric field strength at low frequencies is high, the force on the electrons is large, the work done per unit length is large, and the energy exchange is large, resulting in the electrons passing through. Energy conversion, part of the energy reflows; while the electric field intensity at high frequency points is small, the force on the electrons is small, the work done per unit length is small, and the energy exchange is insufficient, r...
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The invention belongs to the technical field of millimeter wave and terahertz, and specifically provides a high-frequency structure of a broadband traveling wave tube, which is applied to the high-frequency system design of the traveling wave tube in the millimeter wave and terahertz frequency bands. The high-frequency structure of the broadband convoluted traveling wave tube of the present invention adopts the nonlinear gradient "horn" aperture waveguide structure, and the contour distribution of the nonlinear gradient "horn" aperture waveguide along the propagation direction is designed; the high-frequency structure of the present invention breaks through the traditional The relative bandwidth of the structure is limited by 7%, which can meet the free design of different bandwidth requirements, and each frequency point in the band can interact and transduce energy with high efficiency; at the same time, in the design process of the nonlinear gradual "horn" aperture waveguide structure in the present invention , breaking through the "black box" design method based on continuous "trial and error" and optimization iterations based on empirical models, it can be automatically generated by a given broadband factor, greatly reducing design time and calculation costs.
Description
technical field [0001] The invention belongs to the technical field of millimeter wave and terahertz, and in particular relates to a high-frequency structure of a broadband traveling wave tube, which is applied to the high-frequency system design of the traveling wave tube in the millimeter wave and terahertz bands. Background technique [0002] The cyclotron traveling wave tube is an electric vacuum amplification device based on the principle of the electronic cyclotron resonant pulse plug. Unlike the classic traveling wave tube which uses a slow wave high-frequency circuit, the cyclotron traveling wave tube uses a waveguide high-frequency circuit and uses electromagnetic waves whose phase velocity is greater than the speed of light. (that is, fast wave) and relativistic spiral electrons for transverse transduction have the potential of hundreds of kilowatts of broadband output in the millimeter-wave frequency band, and have extremely important application prospects in milli...
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Login to View More IPC IPC(8): H01J23/36
CPCH01J23/36
Inventor 罗勇赵歌歌鄢然姚叶雷王建勋刘国王丽蒲友雷蒋伟吴泽威徐勇马春光
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA