Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Space travelling wave tube group delay inhibition method based on helix internal diameter adjustment

A traveling wave tube and group delay technology, which is applied to the circuit components of traveling wave tubes and transit time electron tubes, etc., can solve inconsistent group delays, affect the overall performance of satellites and spacecraft, and affect the bit error rate of satellite communications. Navigation system time synchronization accuracy, pseudo ranging accuracy, etc., to achieve the effects of group delay suppression, optimized group delay suppression, and reduction of fluctuation amplitude and fluctuation period

Active Publication Date: 2017-06-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Space travelling wave tube group delay inhibition method based on helix internal diameter adjustment
  • Space travelling wave tube group delay inhibition method based on helix internal diameter adjustment
  • Space travelling wave tube group delay inhibition method based on helix internal diameter adjustment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] 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.

[0022] 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.

[0023] Step 1. Use MTSS three-dimensional calculation to simulate the space traveling wave tube to obtain its initial output power and group delay;

[0024] 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. In MTSS, the initial output power and group delay of the space traveling wave tube can be obt...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the space travelling wave tube non-linear technology field and particularly relates to a space travelling wave tube group delay inhibition method based on helix internal diameter adjustment. According to the method, synchronization deviation of an electron beam and electromagnetic waves is controlled through adjusting an internal diameter Ra of a first interaction segment helix to make a relative phase angle of a first interaction segment to be about -50 DEG, so group delay is substantially inhibited at the cost of a little of output power, a fluctuation period is substantially reduced, and fluctuation amplitude is substantially reduced. The method is advantaged in that a synchronization degree of the electromagnetic waves and the electron beam is improved, a clustering state of the electron beam is further substantially improved, the group delay is remarkably inhibited after optimization, the fluctuation amplitude and the fluctuation period are substantially reduced, and the method is mainly applicable to space travelling wave tubes for communication.

Description

technical field [0001] The invention belongs to the field of nonlinear 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 the inner diameter of a helix. 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, w...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01J25/34H01J23/27
CPCH01J23/27H01J25/34
Inventor 邱海舰胡玉禄胡权朱小芳李斌
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com