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Near-far field data transformation method and device based on transfer matrix

A transfer matrix and data transformation technology, which is applied in the directions of measurement devices, radio wave reflection/re-radiation, and utilization of re-radiation, can solve problems such as poor versatility and complex forms of near-far field transformation methods, and achieve accurate transformation effects

Pending Publication Date: 2022-03-15
BEIJING INST OF ENVIRONMENTAL FEATURES
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the near-far field transformation method is complex in form and poor in versatility. Aiming at the defects in the prior art, based on the principle of invariant scattering distribution function, a simple in form, easy to implement and strong in versatility is provided. Improved target near-field / far-field data conversion method to solve the problem of transforming target near-field scattering characteristics to far-field RCS in actual engineering tests

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  • Near-far field data transformation method and device based on transfer matrix
  • Near-far field data transformation method and device based on transfer matrix
  • Near-far field data transformation method and device based on transfer matrix

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Embodiment Construction

[0034]In order to make the objects, technical solutions, and advantages of the present invention more clearly, the technical solutions in the embodiments of the present invention will be described in contemplation in the embodiment of the present invention. It is a part of the embodiments of the invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained without making creative labor without making creative labor.

[0035] figure 1 It is a flow chart of a proximal field data transform method based on the embodiment of the present invention; figure 1 As shown, the embodiment of the present invention provides a proximal field data conversion method based on the transfer matrix, including steps S01: calculates the minimum synthetic aperture angle φ required to perform near far field data transform; step S02: Target area Grid processing; step S03: Constructing near-field observation matrix A N Near field observation matrix ...

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Abstract

The invention relates to a near-far field data transformation method and device based on a transfer matrix. The method comprises the following steps: calculating a minimum synthetic aperture angle phi required by near-far field data transformation; performing gridding processing on the target area; constructing a near-field observation matrix AN; constructing a far-field reconstruction matrix AF; constructing a transfer matrix A based on the near-field observation matrix AN and the far-field reconstruction matrix AF; and mapping from near-field scattering characteristic data to far-field scattering characteristic data of the target is realized through the transfer matrix A. According to the method, the mapping relation between the near-field scattering characteristic and the far-field scattering characteristic of the target is directly established by means of the concept of the transfer matrix, and the near-field scattering characteristic data of the target can be quickly and accurately converted into the far field.

Description

Technical field [0001] The present invention relates to the field of RCS testing and data processing, and more particularly to data conversion methods and apparatus for extrapolation to far fields to far fields under electromagnetic scattering test data under near field conditions. Background technique [0002] The definition of target RCS (radar scattering cross-sectional area) is a remote field, requiring the incident wave of the target and reaching the scattering wave to the receiving antenna as a planar wave. But the real ideal planar wave is not existent; in engineering, the RCS test in the room is generally taken from the far field, that is, the distance between the target and the measurement system is low, the incident wave and the scattering wave are approximately planar wave; in the room Then uses a parabolic reflecting surface and the like, in a certain region, the spherical waves radiated by the feed is converted into a planar wave. When the test conditions are limited...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40G01S13/90
CPCG01S7/4004G01S13/90
Inventor 吕鸣
Owner BEIJING INST OF ENVIRONMENTAL FEATURES
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