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A full-band antenna array and radome integrated simulation method

A simulation method and radome technology, which are applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem that the accuracy and speed requirements cannot be met at the same time, and the RWG moment method is difficult to effectively solve the electrical large-scale, complex-shaped objects. Problems such as the inability to obtain accurate results in the calculation

Pending Publication Date: 2019-05-07
上海索辰信息科技股份有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The application of the traditional method of moments in the numerical analysis and calculation of electromagnetic fields has been very mature. However, when solving large-scale electrical problems, the computational complexity and memory requirements of the method of moments increase as the electromagnetic target unknown N increases. 2 ) or even O(N 3 ) growth, limited by computer storage resources, the traditional RWG moment method is difficult to effectively solve the problem of large-scale electricity, and the calculation of objects with complex shapes cannot obtain accurate results
[0006] Therefore, in view of the fact that the existing simulation calculation methods cannot meet the requirements of accuracy and speed at the same time, it is necessary to use the full-band simulation technology to conduct an overall accurate simulation of the antenna array with the radome, which will result in large-scale calculations and a large amount of simulation tasks. It needs to be realized through advanced algorithms and parallel solution technology, and can be applied to the requirements of fast calculation and accuracy of the electrical performance of the radome

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  • A full-band antenna array and radome integrated simulation method
  • A full-band antenna array and radome integrated simulation method
  • A full-band antenna array and radome integrated simulation method

Examples

Experimental program
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Embodiment 1

[0086] figure 1 It is a flow chart of an integrated simulation method for a full-band antenna array and a radome in a preferred embodiment of the present invention.

[0087] Such as figure 1 As shown, this embodiment provides a full-band antenna array and radome integrated simulation method, including at least:

[0088]Step S1: The simulation platform calls the geometric model module, reads the imported geometric graphics file, extracts geometric feature data, and establishes the geometric model of the antenna and radome.

[0089] Specifically, the geometric model module includes: a geometric feature data import module, which is used to realize the unified reading of geometric graphic files in different formats; a geometric feature modeling module, which extracts the geometric feature data of the imported geometric graphic files, and establishes a geometric model ; The geometric feature data export module is used to export geometric model data files. The format of the impor...

Embodiment 2

[0165] This embodiment provides a simulation platform for integrated simulation of full-band antenna array and radome, including a pre-processing module, an algorithm solving module and a post-processing module.

[0166] 1) Pre-processing module

[0167] The pre-processing module is mainly used to import a variety of aircraft models, directly support STL, IGES, STEP and other 3D models, support surface repair and optimization functions, and directly import material libraries.

[0168] Specifically, this module supports the geometric model of the full-detailed aircraft without simplification; it is convenient to set parameters such as initial frequency, boundary conditions, and excitation field sources; the calculation grid adaptive parameter definition; the material library can be directly imported into the model to be parameterized and Script control, convenient for design and optimization; support import of various aircraft and antenna models; support surface repair optimiza...

Embodiment 3

[0176] Simulation example: simulation analysis of radome antenna radiation characteristics

[0177] In this embodiment, algorithm verification is carried out by means of experimental measurement. In this example,

[0178] 1) Using the high-order moment method to quickly simulate the far-field radiation characteristics of the radome antenna;

[0179] 2) The diameter of the feedforward reflector is 9m, the diameter of the radome is 12.8m, and the simulation frequency band is 2.7-2.9GHz;

[0180] 3) Simulation time: 3 minutes without cover, 1.5 hours with cover.

[0181] Figure 4 A comparison chart of transmittance at different frequencies is given.

[0182] Such as Figure 4 As shown, curve A represents a single antenna, curve B represents an antenna plus a reflector, and curve C represents an antenna plus a reflector plus a radome. Wherein, the abscissa represents frequency (GHz), and the ordinate represents return loss (dB).

[0183] Depend on Figure 4 It can be seen...

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Abstract

The invention discloses a full-band antenna array and radome integrated simulation method. The method comprises the following steps: establishing a geometric model of an antenna and a radome; Importing the mdoel into a material library; Performing grid division on the surface of the geometric model by adopting a high-order moment method based on a high-order basis function; Setting an excitation field; Calculating a near-far field value and surface current data by adopting a parallel solving method based on a block matrix; Extracting electrical performance parameters of the antenna cover; Andoptimizing the electrical performance parameters of the antenna cover until the electrical performance parameters meet the design requirements. On one hand, the number of unknown quantities generatedby the moment method is effectively reduced by adopting the high-order moment method based on the high-order basis function; on the other hand, the parallel solving method based on the partitioning matrix is used for improving the calculation scale and the calculation speed of the moment method, and the bottleneck problem that the moment method consumes time and memory is effectively solved.

Description

technical field [0001] The invention relates to the technical field of radar antennas, in particular to an integrated simulation method for a full-frequency band antenna array and a radome. Background technique [0002] The radome is a kind of dielectric shell that protects the radar antenna. It is a covering made of natural or artificial dielectric materials, or a special-shaped electromagnetic window composed of a dielectric shell supported by a truss. It is located at the front end of the system, which protects the antenna from possible damage under various harsh environmental conditions. However, the existence of the radome will also affect the electrical performance of the antenna, including radiation pattern, power transmission loss, aiming error, etc. [0003] With the popularization of ANSYS HFSS software in antenna feeder system design, the simulation-based design process for antenna and its front-end feeder network has become increasingly mature. Advanced design ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 陈灏
Owner 上海索辰信息科技股份有限公司
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