Discontinuous field matching method for general beam-wave interaction model of traveling wave tube

A technology of injection-wave interaction and matching method, which is applied in the field of discontinuous field matching of the general injection-wave interaction model of traveling wave tubes, can solve the problem of long calculation time, difficulty in establishing theoretical model of injection-wave interaction parameters, and inability to simulate travel Wave tube and other issues to achieve the effect of increasing practicability

CN107609233AActive Publication Date: 2018-01-19UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2018-01-19

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Abstract

The invention discloses a discontinuous field matching method for a general beam-wave interaction model of a traveling wave tube. The method comprises the following steps of S1, solving passive high-frequency field axial distribution e1 and e2 and transmission power p1 and p2 in a structural cycle; S2, performing phase retrieval on e1 and e2 to obtain e10 and e20; S3, performing periodic phase extension on e10 to obtain passive high-frequency field axial distribution E1 of an l1 section; S4, performing phase matching on a field at a jump cross section to obtain a field distribution parameter,with a continuous phase, of a high-frequency field axial component at the jump cross section; S5, performing power and reflection matching on the field at the jump cross section to obtain a passive high-frequency field axial distribution parameter of an l2 section in one structural cycle; and S6, performing periodic phase extension on the parameter obtained in the step S5 to obtain field distribution E2. Through the phase, power and reflection matching and phase extension methods, the field distribution of a whole interaction region is obtained, so that the general beam-wave interaction theoretical model can simulate the beam-wave interaction problem of the traveling wave tube adopting a high-frequency structure with dynamic phase velocity jump.
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Description

technical field

[0001] The invention belongs to the simulation technology of traveling wave tubes, and relates to an improvement of a simulation method for injection wave interaction of traveling wave tubes, in particular to a discontinuous field matching method for a general injection wave interaction model of traveling wave tubes. Background technique

[0002] Traveling wave tubes are currently the most widely used electric vacuum devices. Because of their wide frequency bandwidth and high power, they are widely used in satellite communications, electronic countermeasures and other fields. Computer-aided design (CAD) technology has the advantages of rapidity and cost saving. Today, microwave tube CAD software has become an important tool for the design and optimization of traveling wave tubes. The injection-wave interaction process of TWT is the core of TWT's work. How to accurately simulate the interaction process through numerical methods is an important research area of...

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Embodiment Construction

[0022] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] Such as figure 1 As shown, a discontinuous field matching method for the general injector-wave interaction model of a traveling wave tube includes the following steps:

[0024] S1. Denote the folded waveguide before the jump of the high-frequency structure of the traveling wave tube injection wave interaction as l 1 segment, and its structural period length is denoted as L 1 ; The folded waveguide after the jump is denoted as l 2 segment, and its structural period length is denoted as L 2 ; Utilize the three-dimensional high-frequency simulation software HFCS for l 1 segment and l 2 L 1 and L 2 Carry out scanning calculation for the parameter, this embodiment sets the number of radial grids to be 20, the number of angular grids to be 20, and the number of axial grids to be 50; get l 1 segment and l 2 T...