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Automatic lattice dividing method for analyzing multiple antenna and scatterer structure by method of moment

A technique of grid division and structural analysis, applied in the direction of independent non-interactive antenna combinations, electromagnetic field characteristics, etc., can solve the problems of non-plane elements, line-surface joint points cannot be located, and the position of the connecting antenna surface cannot be tilted, etc., to achieve The effect of fast operation speed

Inactive Publication Date: 2006-11-08
XIDIAN UNIV
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  • Application Information

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Problems solved by technology

It can be seen that the existing research results have the following problems: (1) the line-surface joint point cannot be located on a triangular surface or a general quadrilateral surface; (2) the position of the surface connecting the antenna cannot be inclined; (3) the line-plane joint point The surface element is not an ideal square; (4) The treatment of narrow and long surface elements is not considered

Method used

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  • Automatic lattice dividing method for analyzing multiple antenna and scatterer structure by method of moment
  • Automatic lattice dividing method for analyzing multiple antenna and scatterer structure by method of moment
  • Automatic lattice dividing method for analyzing multiple antenna and scatterer structure by method of moment

Examples

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example 1

[0099] The present invention divides the simulated grid of the pyramid model, and the process and results of the grid division are as follows.

[0100] (1) Establish a quadrangular pyramid model

[0101] The pyramid of the quadrangular pyramid model is composed of 4 triangular faces and 1 quadrilateral envelope, and the cone height is 4 meters; a whip antenna is placed on each of the 4 side faces of the quadrangular pyramid, and the length of the antenna is 3 meters, as shown in Figure 15 as shown in a.

[0102] (2) Carry out three grid divisions on the built model respectively

[0103] Under the condition that the antenna transmission frequency is 80MHz, that is, the wavelength λ=3.75 meters, the model is meshed for the first time to obtain 642 triangle surface elements and quadrilateral surface elements; then the triangle surface elements connected to the 4 antennas are divided according to The positions of the joint points of the line and surface are different, and then ...

example 2

[0105] The present invention performs simulation grid division on the communication vehicle model, and the process and results of the grid division are as follows.

[0106] (1) Establish a communication vehicle model

[0107] The communication car model is composed of car body and antenna. The scattering surface enveloping the car body has 8 triangles, 5 rectangles and 8 general quadrilaterals. There are 6 whip antennas, one of which is on the inclined, non-rectangular surface on, such as Figure 16 as shown in a.

[0108] (2) Carry out three grid divisions on the built model respectively

[0109] Under the condition that the antenna transmission frequency is 60MHz, that is, the wavelength λ = 5 meters, the model is meshed for the first time to obtain 528 triangle surface elements and quadrilateral surface elements; then the quadrilateral surface elements connected to the 6 antennas are divided according to The positions of the joint points of the line and surface are diffe...

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Abstract

This invention discloses an automatic dividing method for networks to a multi-antenna-scattered structure with a moment method, which carries out three times of network partition to the dispersion surface on the basis of setting up geometrical models, firstly, it neglects antennas connected by the scatterer surfaces to apply a recursive dichotomy to divide the surface of the scatterer into triangles and quadrangles surface elements, secondly, it considers the antenna of the scatterer surface and divides the divided triangle and the quadrangle surface elements again into a square element with the line-surface link points at the center of the quadrangle, several triangles without line-surface link points and quadrangles in terms of different positions of the line-surface link points, thirdly, carries out network dividing to the narrow and long elements to get triangles and quadrangles even smaller than those of last two times.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic compatibility, and relates to a grid division method used in numerical analysis of electromagnetic fields, in particular to an automatic grid division method for multi-antenna-scatterer structural analysis using the method of moments, which can be used in vehicle and airborne , Antenna coupling degree, line current and surface current, field strength and pattern calculation of shipboard multi-antenna communication system to guide and evaluate electromagnetic compatibility design. Background technique [0002] Modern communication system carriers such as vehicles, aircraft, and ships are loaded with various electronic devices with different functions and various antennas for receiving and transmitting signals. These devices and antennas are distributed in a relatively small space. There will be very serious interference between devices, and most of them are caused by the mutual interference...

Claims

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Application Information

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IPC IPC(8): H01Q21/28G01R29/08
Inventor 许社教邱扬田锦袁军
Owner XIDIAN UNIV
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