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A Group Delay Suppression Method for Spatial Traveling Wave Tubes Based on Clamp Rod Adjustment

A traveling wave tube and group delay technology is applied in the field of space traveling wave tube group delay suppression, which can solve the problem of affecting the overall performance of satellites and spacecraft, and affecting the time synchronization accuracy of satellite communication bit error rate navigation systems. Accuracy of pseudo ranging , 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: 2020-05-12
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

Method used

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  • A Group Delay Suppression Method for Spatial Traveling Wave Tubes Based on Clamp Rod Adjustment
  • A Group Delay Suppression Method for Spatial Traveling Wave Tubes Based on Clamp Rod Adjustment
  • A Group Delay Suppression Method for Spatial Traveling Wave Tubes Based on Clamp Rod Adjustment

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Embodiment Construction

[0022] Taking the Ku-band helical 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 below.

[0023] For the 11GHz-11.5GHz Ku-band helical traveling wave tube, the group delay suppression simulation of the space traveling wave tube is carried out. Firstly, the user index requires that the minimum output power in the entire frequency range be greater than 150W.

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

[0025] Such as figure 1 and figure 2 As shown, the Ku-band band helical traveling wave tube is used, its high-frequency structure adopts rectangular clamping rods without fins, and the interaction structure adopts positive jump and negative gradient pitch distribution. figure 1 Middle: R A is the inner diameter of the helix, R 0 is the inner diameter of the s...

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Abstract

The invention belongs to the non-linear technical field of space traveling wave tubes, in particular to a method for suppressing the time delay of a space traveling wave tube group based on clamping rod adjustment. The invention controls the synchronization deviation between the electronic injection and the electromagnetic wave by adjusting the width n of the rectangular clamping rod in the first section of the interaction, so that the relative phase angle of the first section of the interaction is about ‑50 degrees, so at the expense of sacrificing a small amount of output power, The group delay is greatly suppressed, the fluctuation period is greatly reduced, and the fluctuation range is greatly reduced. Under the premise of ensuring that the output power in the entire frequency band meets the user's index (>150W), the group delay is significantly suppressed, and the fluctuation range and fluctuation period are significantly reduced, and the invention is mainly aimed at the space traveling wave tube used for communication.

Description

technical field [0001] The invention belongs to the field of non-linear technology of space traveling wave tubes, in particular to a method for suppressing group time delay of space traveling wave tubes based on the adjustment of clamping rods. Background technique [0002] Space-borne TWT is the final power amplifier widely used in satellite and spacecraft transponders, data transmission systems, radar and electronic countermeasure transmitters, etc. With the rapid development of my country's aerospace industry, there is a very urgent demand for the development and production of space traveling wave tube amplifiers. [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 accuracy of pseudo ranging, which is Becaus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15H03F3/58
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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