Whole-ship electromagnetic scattering prediction method of large-scale shipboard array antenna

An array antenna and electromagnetic scattering technology, applied in the direction of electromagnetic field characteristics, can solve problems such as large amount of calculation, difficult to predict, and large scale

Inactive Publication Date: 2012-02-15
CHINA SHIP DEV & DESIGN CENT
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Problems solved by technology

In addition, due to the large scale of this type of array antenna, traditional array antenna prediction methods will encounter technical difficulties that require huge amounts of calculation and are difficult to predict

Method used

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  • Whole-ship electromagnetic scattering prediction method of large-scale shipboard array antenna
  • Whole-ship electromagnetic scattering prediction method of large-scale shipboard array antenna
  • Whole-ship electromagnetic scattering prediction method of large-scale shipboard array antenna

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Embodiment Construction

[0025] Further description will be given below in conjunction with specific examples.

[0026] A shipboard large-scale array antenna, each array element is arranged in a positive cross, and the array element antenna only works within the range of 60-90 degrees in azimuth and 0 degrees in elevation.

[0027] 1) Based on the periodic moment method, according to the drawing of the array element, establish a geometric model for a single array element in the program interface of the method of moments, such as figure 1 shown.

[0028] 2) Supplement the model in step 1) according to the periodic boundary conditions and the number of array elements to obtain the model of the entire array. In this embodiment, there are 10 array elements in the x direction and 10 array elements in the y direction.

[0029] 3) The iterative residual is set by the periodic moment method, and the periodic moment method program is run to simulate the set model to obtain the scattering characteristics of th...

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Abstract

The invention provides a whole-ship electromagnetic scattering prediction method of a large-scale shipboard array antenna, and the method is characterized by comprising the following steps of: 1) modeling based on single array element of the large-scale array antenna based on a period moment method; 2) supplementing a model obtained in the step 1) according to periodic boundary conditions and an array element permutation number to obtain a model of the whole array; 3) carrying out simulation calculation on the set model by using the period moment method to obtain the scattering properties of the large-scale shipboard array antenna; and 4) comparing the scattering properties of the large-scale shipboard array antenna with a result of a ship load part to obtain a correction of the large-scale shipboard array antenna to whole-ship scattering properties. Compared with the whole-ship electromagnetic scattering prediction method of the traditional shipboard array antenna, the method provided by the invention has the advantage that a large amount of the calculation which is caused by modeling entirely is avoided so that the large-scale shipboard array antenna and whole-ship electromagnetic scattering prediction become feasible.

Description

technical field [0001] The invention belongs to the field of electromagnetic compatibility research, and in particular relates to an electromagnetic scattering prediction method of the whole ship after a large-scale typical array antenna is loaded on the ship. Background technique [0002] As modern ships and aircraft are loaded with various antennas, their influence on platform scattering is gradually increasing, and array antennas (especially large-scale array antennas) have a more significant impact on ship scattering. In order to reduce the significant impact of large-scale array antennas on the ship's scattering characteristics, it is necessary to master the whole-ship electromagnetic scattering prediction method of large-scale array antennas on board ships. [0003] However, the electromagnetic scattering prediction of shipboard large-scale array antenna is different from the traditional antenna (especially array antenna) electromagnetic scattering prediction, which is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/08
Inventor 方重华邓峰张崎赵晓楠余为波卞大鹏
Owner CHINA SHIP DEV & DESIGN CENT
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