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Calibration method of target near-field co-polar scattering characteristics based on Poynting vector

A technique of Poynting vector and scattering characteristics, applied in the field of near-field characteristic calibration

Active Publication Date: 2021-06-04
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology

[0011] Based on the above, the present invention proposes a method for calibrating near-field co-polarization scattering characteristics of a target based on Poynting vectors, and completes the calibration of near-field scattering characteristics through traditional theories, solving the shortcomings and limitations of the prior art

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  • Calibration method of target near-field co-polar scattering characteristics based on Poynting vector
  • Calibration method of target near-field co-polar scattering characteristics based on Poynting vector
  • Calibration method of target near-field co-polar scattering characteristics based on Poynting vector

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[0037] The following combination Figure 1 ~ Figure 2 , the technical content, structural features, achieved goals and effects of the present invention will be described in detail through preferred embodiments.

[0038] Such as figure 1 As shown, the method for calibrating the near-field co-polarization scattering characteristics of the target based on the Poynting vector provided by the present invention comprises the following steps:

[0039] S1. Using the MoM (Method of Moments, method of moments) method, a metal ball of a certain size is modeled, and the total scattering field characteristics of the metal ball at different distances are obtained through simulation calculations;

[0040] S2. Using the MoM method, in the same state as S1 and without a metal ball, obtain the incident field characteristics at different distances through simulation calculations;

[0041] S3. According to the characteristics of the total scattering field and the characteristics of the incident f...

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Abstract

The present invention relates to a method for calibrating the near-field co-polarization scattering characteristics of a target based on Poynting vectors, comprising: S1, using the MoM method, and obtaining the total scattering field characteristics of metal balls at different distances through simulation calculation; S2, using The MoM method, in the absence of metal balls, obtains the characteristics of the incident field at different distances through simulation calculations; S3, obtains the characteristics of the reflection field of the metal balls as a function of distance; S4, uses the Poynting vector method to obtain the characteristics of the metal balls at different distances Near-field scattering energy and incident field energy at different distances; S5, the characteristics of the near-field scattering RCS of the calibration metal ball with distance; S6, introducing a large number fitting method to obtain the near-field scattering of the metal ball at different distances RCS fitting formula. The invention obtains the near-field scattering characteristics of the metal ball target with different distances under the excitation of the plane wave through the precise moment method and the Poynting vector theory, and provides a basis for subsequent RCS calibration of target scattering by different detectors.

Description

technical field [0001] The invention relates to a method for calibrating near-field co-polarization scattering characteristics of a target based on Poynting vectors, in particular to a method for calibrating near-field based on metal balls under plane wave excitation, and belongs to the technical field of calibrating near-field characteristics. Background technique [0002] The calibration of near-field electromagnetic scattering characteristics (radar cross section, RCS) has always been one of the difficulties in the development of short-range detection systems and electromagnetic scattering. The guidance and tracking of the missile-borne radar to the target and the coordination of the fuze depend on the near-field characteristics. The calibration of the target's near-field RCS characteristics is the key to the calibration of the target's near-field characteristics, which in turn affects the tracking accuracy of the terminal guidance radar and the short-range detection of th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40G06F30/20
CPCG01S7/40
Inventor 李利
Owner SHANGHAI RADIO EQUIP RES INST
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