Wave number domain near-field imaging method and device for synthetic aperture radiometer

A comprehensive aperture and near-field imaging technology, applied in the directions of re-radiation, radio wave reflection/re-radiation, calculation, etc., can solve the problem of high cost and achieve the effect of near-field high-precision imaging

Pending Publication Date: 2022-03-18
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, this algorithm is applied to the one-to-many complex correlation method, and its array is required to be full, which is extremely costly

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  • Wave number domain near-field imaging method and device for synthetic aperture radiometer
  • Wave number domain near-field imaging method and device for synthetic aperture radiometer
  • Wave number domain near-field imaging method and device for synthetic aperture radiometer

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[0043] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0044] In the present invention, the terms "first", "second" and the like (if any) in the present invention and drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0045] figure 1 It is a flow chart of a synthetic aperture radiometer wavenumber domain near-field imaging method provided by an embodiment of the present inventi...

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Abstract

The invention discloses a synthetic aperture radiometer wavenumber domain near-field imaging method and device, and belongs to the field of millimeter wave radiation detection, and the method comprises the steps: measuring the brightness temperature distribution of a near-field target region through an antenna array of a synthetic aperture radiometer, so as to generate a corresponding four-dimensional near-field visibility function; fourier transform is carried out on the four-dimensional near-field visibility function to realize wavenumber domain decomposition, and four-dimensional wavenumber domain information in the four-dimensional near-field visibility function is obtained; performing range phase compensation on the four-dimensional wavenumber domain information to remove range coupling to obtain two-dimensional wavenumber domain data; and performing Fourier transform or inverse Fourier transform on the two-dimensional wave number domain data to generate an inverted image of the near-field target area. High-resolution, high-precision and large-view-field imaging of a synthetic aperture millimeter wave radiometer plane array near field is realized, synthetic aperture distance-information-free near-field imaging is realized, and application of a synthetic aperture passive millimeter wave imaging technology in the near-field imaging field is promoted.

Description

technical field [0001] The invention belongs to the field of millimeter wave radiation detection, and more specifically relates to a near-field imaging method and equipment in the wavenumber domain of a synthetic aperture radiometer. Background technique [0002] According to Planck's black body radiation law, all substances with a temperature higher than absolute zero radiate energy in the form of electromagnetic waves. The millimeter wave radiometer is a highly sensitive receiver for measuring the electromagnetic radiation energy of substances in the millimeter wave band. By receiving millimeter-wave signals, the physical parameters or information of each observed object are obtained, which is usually called passive millimeter-wave radiation detection technology. Passive millimeter wave radiation has the advantages of strong penetrability, self-concealment, and all-day and quasi-all-weather work. Therefore, it is widely used in fields such as ocean monitoring, atmospheric ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90G01S13/88G06F17/14
CPCG01S13/9021G01S13/9023G01S13/887G06F17/141
Inventor 胡飞付鹏朱冬苏金龙
Owner HUAZHONG UNIV OF SCI & TECH
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