Rapid simulation method for target near-field radar echoes

A radar echo and simulation method technology, applied in the field of electromagnetic calculation, can solve the problems of long test period, insufficient accuracy, and low efficiency, and achieve the effects of avoiding temporary calculation, solving poor calculation accuracy, and improving reuse

Active Publication Date: 2020-10-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0005] 1. The actual measurement has high requirements on the site, many interference factors, and a long test cycle, which inevitably limits its practical application
[0006] 2. In the numerical method, the high-frequency approximate numerical method cannot accurately describe the fine structure of the target, and the calculation result of the complex target deviates from the actual measurement result
However, the traditional full-wave numerical method needs to integrate the surface equivalent electromagnetic current of the entire target to c

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  • Rapid simulation method for target near-field radar echoes
  • Rapid simulation method for target near-field radar echoes
  • Rapid simulation method for target near-field radar echoes

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Embodiment Construction

[0039] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0040] The invention provides a fast simulation method for near-field radar echo of a target, in particular a fast simulation method for near-field echo based on fast generation and retrieval of a near-field scattering database. The method as figure 1 shown, including the following steps:

[0041] Step 1: Obtain the incident-based state space. Using low-rank decomposition methods, such as bone element technology, to compress different incident state quantities such as frequency, polarization, incident angle, antenna pattern, etc., to obtain a complete base state space, which is used as a search field for the near-field scattering database.

[0042] Step 2: Numerically solve the equivalent electromagnetic current distribution on the target surface under the irradiation of incident fields in different base states. The method of solving the equivalent elec...

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Abstract

The invention discloses a rapid simulation method for target near-field radar echoes. Rapid calculation of the near-field echoes in different states is achieved. A near-field scattering database can be rapidly obtained by utilizing a multilayer matrix decomposition or multilayer rapid multipole technology; a quick search tree is established, a database can be quickly retrieved, and near-field echoes of any field point in an observation area can be accurately obtained.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic calculation, and in particular relates to a fast simulation method of target near-field radar echo. Background technique [0002] The research on near-field electromagnetic scattering characteristics of targets is developed based on the background of radio fuze related technologies, and plays an important role in the fields of precision guidance and electromagnetic compatibility. In near-field conditions, the radar echo needs to consider the non-plane wave effect of the incident field, distance and local illumination. In addition, in related applications, there is still high-speed motion between the target and the antenna, and the influence of many factors increases the difficulty of near-field radar echo research. [0003] The prior art acquires target near-field radar echo mainly through actual measurement and numerical simulation. Among them, the actual measurement is to carry out exp...

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Application Information

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IPC IPC(8): G06F30/20G01S7/40
CPCG06F30/20G01S7/4052Y02A90/10
Inventor 盛新庆黄晓伟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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