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A Two-dimensional Image Modulator for Synthetic Aperture Radar Based on Phase Modulation Surface

A technology of synthetic aperture radar and phase modulation, which is applied in the direction of instruments, radio wave reflection/re-radiation, measuring devices, etc., to achieve the effects of easy control and implementation, low development/maintenance costs, and reduced probability of discovery and identification

Active Publication Date: 2018-09-18
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the deficiencies of the existing SAR one-dimensional image modulator, and provides a SAR two-dimensional image modulator based on a phase modulation surface

Method used

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  • A Two-dimensional Image Modulator for Synthetic Aperture Radar Based on Phase Modulation Surface
  • A Two-dimensional Image Modulator for Synthetic Aperture Radar Based on Phase Modulation Surface
  • A Two-dimensional Image Modulator for Synthetic Aperture Radar Based on Phase Modulation Surface

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Embodiment Construction

[0022] The present invention will be further described by taking two spiral arms as an example below in conjunction with the accompanying drawings.

[0023] In the implementation process of the present invention, the design and manufacture of the two-dimensional image modulator must be completed first. exist figure 1 In the composition schematic diagram of the two-dimensional image modulator shown, the four-quadrant phase modulation surface 1 and the spiral arm 2 are fixed together. One end of the swing arm 2 is inserted into the turntable 3 and fixed therewith. Turntable 3 is driven by motor 4 and can rotate horizontally.

[0024] figure 1 In the example described, the number of spiral arms is two, but in practice it can be three, four, five, etc. The arms are evenly spaced around the rotation axis, and the angle φ between adjacent arms is:

[0025]

[0026] Among them, π is the circumference ratio, and N is the number of spiral arms.

[0027] figure 2 is the struc...

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Abstract

The invention discloses a synthetic aperture radar two-dimensional diagram image modulator based on a phase modulation surface, comprising a four-phase phase modulation surface, a rotation arm, a rotation table, a motor, a phase modulation surface digital controller and a motor digital controller; the modulation surface consists of one bottom plate and four side plates; the bottom plate and the side plates are formed by the modulation surface; the four side plates are vertically fixed on the bottom plate; the four side plates and the bottom plate form four analogy trihedral angle reflectors; the modulation surface is fixed on the rotation arm which is fixedly connected to the rotation table; the rotation table is electrically connected to the motor; the motor is electrically connected to the motor digital controller; the bottom plate and the four side plates are electrically connected to the digital controller; one end of the rotation arm which is away from the rotation table is used for bearing the modulation surface; the rotation arm connected to the rotation table is controlled by the rotation table and is rotated under the driving of the rotation table; the rotation of the rotation table is driven by the motor and the rotation speed is controlled by the motor digital controller; and the modulation surface digital controller is used for controlling the reflection characteristics of the four-phase phase modulation surface.

Description

【Technical field】 [0001] The invention belongs to the field of synthetic aperture radar image modulation. Specifically, it involves improving the traditional one-dimensional synthetic aperture radar image modulator by using the phase modulation surface, and further speaking, designing a two-dimensional synthetic aperture radar image modulator based on the phase modulation surface. 【Background technique】 [0002] Synthetic Aperture Radar (SAR) has the ability to perform all-weather and all-weather two-dimensional high-resolution imaging of ground targets, and is an important part of strategic reconnaissance and battlefield surveillance systems. The SARs currently deployed in various countries include: the Lynx system on the "Predator" UAV, the HISAR on the "Global Hawk" UAV, the I-Master on the French "Hawkeye" UAV platform, Germany's TerraSAR, Canada's " The spaceborne SAR system on Radarsat 2", etc. In order to effectively cope with the continuous development and applicat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/38G01S13/90
CPCG01S7/38G01S13/90
Inventor 冯德军徐乐涛张然傅其祥艾小锋王雪松赵锋解东
Owner NAT UNIV OF DEFENSE TECH
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