THz ISAR imaging system and image reconstruction method based on backward projection

An imaging system and terahertz technology, applied in the field of terahertz radar imaging, can solve the problems of low imaging resolution and accuracy, and achieve the effect of high resolution, high resolution and small imaging error of imaging results.

Active Publication Date: 2018-12-11
SHANXI UNIV
View PDF2 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Aiming at the problem that the imaging resolution and precision are not high when the terahertz radar adopts the range-Doppler algorithm to reconstruct the target image, the present invention provides a method for high-resolution ISAR image reconstruction. The basic idea of ​​the method is Reconstruction of terahertz ISAR images is achieved by back-projecting echo signals into the imaging area and coherently accumulating them

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
  • THz ISAR imaging system and image reconstruction method based on backward projection
  • THz ISAR imaging system and image reconstruction method based on backward projection
  • THz ISAR imaging system and image reconstruction method based on backward projection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] A terahertz inverse synthetic aperture radar imaging system includes a terahertz frequency stepping radar imaging system and a two-dimensional turntable scanning system.

[0027] The terahertz frequency stepping radar imaging system includes a frequency synthesis module, a radio frequency front end, an intermediate frequency module, a horn antenna module, a signal acquisition and processing module, a host computer control unit, and an image display unit. Among them, the control unit of the host computer is connected to the frequency synthesis module through the RS232 communication serial port, the frequency synthesis module is connected to the RF front-end through a high-frequency low-loss cable, the RF front-end is connected to the horn antenna module through a gold-plated rectangular waveguide, and the RF front-end is connected to the intermediate frequency module through The high-frequency low-loss cable is connected, the intermediate frequency module is connected to ...

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 discloses a THz ISAR imaging system and an image reconstruction method based on backward projection. The stepped THz ISAR system comprises a THz frequency stepped ISAR imaging system, atwo-dimensional high-precision electronic control rotary table and a stepped motor controller, wherein the stepped motor controller controls the two-dimensional high-precision electronic control rotary table to rotate; the THz frequency stepped ISAR imaging system comprises a frequency hopping module, a radio frequency front end, an intermediate frequency module, a horn antenna module and a signalacquisition and processing module; the two-dimensional high-precision electronic control rotary table comprises ultra-precision shafting, a precision turbine, a worm drive, a grating dial, a liquid crystal screen and a standard computer communication interface; and the stepped motor controller comprises a control unit, a motor drive and a voltage-stabilization circuit.

Description

technical field [0001] The invention belongs to the technical field of terahertz radar imaging, and in particular relates to a terahertz frequency stepping ISAR imaging system and a two-dimensional high-resolution image reconstruction method. Background technique [0002] Terahertz refers to electromagnetic waves with a frequency of 0.1THz-10THz, corresponding to a wavelength of 3mm-30μm, which is between infrared and microwave on the electromagnetic spectrum, and is called submillimeter wave or far-infrared light. transition zone. Therefore, it has the advantages of both infrared and microwave. Compared with microwave radar, terahertz radar is easier to achieve large bandwidth and extremely narrow antenna beam, so as to obtain high-resolution images. [0003] Cooper K B, Dengler R J, Llombart N, et al. THz imaging radar for standoff personnel screening [J]. IEEE Transactions on Terahertz Science and Technology, 2011, 1(1): 169-182. [0004] Cooper, Ken B., et al."Fast hi...

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): G01S13/90G01S7/41
CPCG01S7/41G01S7/411G01S13/904G01S13/9064G01S13/9017
Inventor 梁美彦张存林
Owner SHANXI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap