Loss-compensated frequency division multiplexing millimeter wave three-dimensional imaging device and method

Abstract

The invention discloses a loss-compensated frequency division multiplexing millimeter wave three-dimensional imaging device and method. The device comprises a control unit, a radio frequency unit andan antenna array which are sequentially connected, wherein the radio frequency unit comprises a frequency multiplier array, a power divider array, a millimeter wave transmitting and receiving array, an electronic switch array, an orthogonal mixer array and a splitter array; the frequency multiplier array is connected with the power divider array, one path of the output of the power divider array is connected with the millimeter wave transmitting and receiving array, the other path is connected with the orthogonal mixer array, the output of the millimeter wave transmitting and receiving array is connected with the orthogonal mixer array, and the orthogonal mixer array is connected with the splitter array. The loss-compensated frequency division multiplexing millimeter wave three-dimensionalimaging device has the beneficial effects that a back-scattering data model of a target object is equivalent to an angular spectrum formula for calculating the propagation process of the light field,the propagation loss of millimeter waves in the space is compensated in the process of image reconstruction, and the quality of millimeter wave three-dimensional imaging is improved.

Description

technical field [0001] The invention belongs to the field of millimeter-wave imaging, and in particular relates to a loss-compensated frequency division multiplexing millimeter-wave three-dimensional imaging device and method. Background technique [0002] The millimeter wave with a frequency in the range of 30GHz to 300GH is especially suitable for application in the field of human security inspection due to its good clothing penetration, high imaging resolution, and non-ionizing radiation. Related millimeter-wave 3D imaging devices and methods have become a current research hotspot. [0003] Among the existing products, the widely used 3D millimeter-wave imaging technology is divided into two categories: holographic imaging technology and distance migration technology. [0004] Millimeter-wave holographic imaging technology is derived from optical holographic technology, which decomposes the scattered spherical wave of the near-field target into the superposition of multi...

AI Technical Summary

Problems solved by technology

[0006] However, the traditional holographic imaging technology and range migration technology ignore the propagation loss of electromagnetic waves in space during the image reconstruction process, which will inevitably affect the quality of near-field millimeter-wave 3D imaging.

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