Thermal matching characteristic simulation method for input and output structure of helix traveling wave tube and slow wave system
A slow-wave system, input and output technology, applied in traveling wave tubes, design optimization/simulation, special data processing applications, etc., can solve the problems of long development cycle and high cost
Active Publication Date: 2020-12-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0005] For the matching between the input and output structure of the traveling wave tube and the slow wave system, although the thermal standing wave ratio of the input and output ports under the working state of the traveling wave tube can be measured and analyzed experimentally, this method requires repeated processing and testing, and the cost is high , the development cycle is also long
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[0023] Taking a helical traveling wave tube with a frequency band of 12-13 GHz as an example, the technical solution of the present invention will be described in detail in combination with the results of the accompanying drawings.
[0024] A simulation method for the thermal matching characteristics of the input and output structures of the helical traveling wave tube and the slow wave system, such as figure 1 shown, including the following steps:
[0025] (1) Establish the initial model of the slow-wave structure of the helical TWT in the 12-13GHz band according to the work requirements, including the pitch, inner diameter, section size and clamping rod size of the helix.
[0026] (2) Calculate the normalized value of the electron initial velocity according to the electron voltage and current parameters. Using the injection wave interaction module of the helical TWT simulation software to scan the parameters of the pitch of the slow wave structure, the gain curve is obtaine...
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The invention belongs to the technical field of microwave vacuum electronics, and particularly relates to a thermal matching characteristic simulation method for an input and output structure of a helix traveling wave tube and a slow wave system. The invention provides the method for simulating thermal matching characteristics of the input and output structure of the helix traveling wave tube andthe slow wave system , aiming at solving the problem that standing-wave ratio simulation without electron beam loading cannot truly reflect the matching performance of a traveling-wave tube energy transmission device in a working state. The method comprises the following steps: firstly, determining electromagnetic characteristics of an equivalent medium from the perspective of beam-wave interaction based on a theory that introduction of a space charge field can enable high-frequency dispersion of a slow-wave structure to shift; and then, using the determined equivalent medium for equalizing the influence of an electron beam on a slow wave structure electromagnetic wave, so as to realize the reflection characteristic simulation of the energy transmission port in the state of the hot electron beam. An effective method is provided for the high-performance simulation design of the helix traveling wave tube.
Description
technical field [0001] The invention belongs to the technical field of microwave vacuum electronics, and in particular relates to a method for simulating thermal matching characteristics of an input and output structure of a helical traveling wave tube and a slow wave system. Background technique [0002] With its advantages of high efficiency, high gain, wide frequency band and high power, traveling wave tubes have become the core components of some important military fields, such as radar satellites, electronic countermeasures, communications and so on. The traveling wave tube energy transmission structure is a device that transmits the high frequency electromagnetic field signal of the traveling wave tube to the slow wave structure. In the work of TWT, the matching of input-output structure and slow-wave structure is very important, which directly affects the gain, power, frequency band characteristics and other performances of TWT. [0003] In general, the research on t...
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IPC IPC(8): G06F30/20G06F30/17H01J23/26H01J25/34
CPCG06F30/20G06F30/17H01J23/26H01J25/34H01J2223/27H01J2225/34
Inventor 朱小芳刘晓东胡玉禄胡权杨中海李斌
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA