Clamping rod adjustment-based spatial traveling wave tube group time delay inhibition method

A traveling wave tube and group delay technology, which is applied to amplifiers with propagation time effects, special data processing applications, instruments, etc. Accurate pseudo ranging accuracy, inconsistent group delay and other problems, to achieve the effect of reducing the fluctuation range, reducing the fluctuation period, and suppressing the group delay

Active Publication Date: 2017-08-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0003] However, various nonlinear characteristics in the space traveling wave tube amplifier will directly affect the overall performance of satellites and spacecraft, among which the group delay affects the bit error rate of satellite communication, the time synchronization accuracy of the navigation system and the pseudo ranging accuracy, which is Because the traveling wave tube is a complex dispersion system, its nonlinear injection wave interaction process will produce a group delay phenomenon in which the phases of different frequency signals are inconsistent

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  • Clamping rod adjustment-based spatial traveling wave tube group time delay inhibition method
  • Clamping rod adjustment-based spatial traveling wave tube group time delay inhibition method
  • Clamping rod adjustment-based spatial traveling wave tube group time delay inhibition method

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[0022] In the following, taking the Ku-band spiral traveling wave tube with a frequency range of 11 GHz-11.5 GHz as an example, the technical solution of the present invention will be further described in detail.

[0023] For the 11GHz-11.5GHz Ku-band helical traveling wave tube, the space traveling wave tube is simulated for group delay suppression. First, the user specifications require that the minimum output power in the entire frequency range is greater than 150W.

[0024] Step 1. Use MTSS to calculate the three-dimensional space traveling wave tube for simulation to obtain its initial output power and group delay;

[0025] Such as figure 1 with figure 2 As shown, the Ku-band spiral traveling wave tube is adopted, the high-frequency structure adopts a rectangular clamping rod without fins, and the interaction structure adopts a positive jump and negative gradual pitch distribution. The initial output power and group delay of the space traveling wave tube can be directly obtaine...

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Abstract

The invention belongs to the technical field of spatial traveling wave tube nonlinearity, and particularly relates to a clamping rod adjustment-based spatial traveling wave tube group time delay inhibition method. According to the method, a synchronous deviation of an electron beam and an electromagnetic wave is controlled by adjusting the width n of a rectangular clamping rod of a first interaction section, and a relative phase angle of the first interaction section is enabled to be about 50 degrees, so that the group time delay is greatly inhibited by consuming a small amount of output power, the fluctuation cycle is greatly shortened, and the fluctuation range is greatly narrowed. On the premise of ensuring that the output power meets a user index (>150W) in the whole frequency band range, the group time delay is remarkably inhibited, and the fluctuation range and the fluctuation cycle are remarkably narrowed and shortened; and the method mainly aims at spatial traveling wave tubes used for communication.

Description

Technical field [0001] The invention belongs to the non-linear technical field of space traveling wave tubes, and specifically is a method for suppressing the time delay of a space traveling wave tube group based on a clamping rod adjustment. Background technique [0002] Space-borne TWT (Space-borne TWT) is a final power amplifier widely used in satellites and spacecraft transponders, data transmission systems, radars and electronic countermeasure transmitters. With the rapid development of my country's aerospace industry, there is a very urgent need for the development and production of space traveling wave tube amplifiers. [0003] However, various nonlinear characteristics in space traveling wave tube amplifiers will directly affect the overall performance of satellites and spacecraft. Among them, group delay affects the bit error rate of satellite communication, the time synchronization accuracy of the navigation system, and the accuracy of pseudo ranging. Because the traveli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50H03F3/58
CPCG06F30/15G06F2119/12H03F3/58
Inventor 胡玉禄邱海舰胡权朱小芳杨中海李斌
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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