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A method and device for constructing a four-element three-dimensional array

A three-dimensional array, four-array element technology, which is applied to measurement devices, direction-determining direction devices, instruments, etc., can solve the problems of low direction-finding accuracy, time-sharing measurement phase difference cannot be real-time direction-finding, and direction-finding accuracy is low. , to achieve the effect of improving direction finding accuracy, satisfying direction finding accuracy, and improving direction finding accuracy

Active Publication Date: 2020-02-07
36TH RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a method and device for constructing a three-dimensional array of four array elements, in order to solve the problem of low accuracy of direction finding in areas with small pitch angles in the existing array antenna direction finding system when the direction of arrival of the radiation source is determined The time-sharing measurement phase difference cannot be used for real-time direction finding, so the accuracy of direction finding is not high

Method used

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  • A method and device for constructing a four-element three-dimensional array
  • A method and device for constructing a four-element three-dimensional array
  • A method and device for constructing a four-element three-dimensional array

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Embodiment 1

[0030] figure 1 It is a flowchart of a method for constructing a four-element three-dimensional array according to an embodiment of the present invention, such as figure 1 as shown,

[0031] In step S110, the three-dimensional Cartesian coordinate system in which the traditional three-element planar array is located is arbitrarily rotated by an angle, and a non-coplanar fourth array element is added to construct a preliminary four-element three-dimensional array, wherein the first array element is The origin of the 3D Cartesian coordinate system.

[0032] In step S120, the phase differences of the other three array elements relative to the first array element are synchronously calculated based on the preliminary four-element stereo array.

[0033] In step S130, a direction finding model is constructed according to the calculated phase difference of the other three array elements relative to the first array element.

[0034] In step S140, the direction finding error between ...

Embodiment 2

[0092] image 3 It is a structural schematic diagram of a device for constructing a four-element three-dimensional array according to an embodiment of the present invention, such as image 3 As shown, the device includes:

[0093] The three-dimensional array preliminary construction unit 210 is used to rotate the traditional three-element planar array by an angle, add a non-coplanar fourth array element, and construct a preliminary four-element three-dimensional array, wherein the first array element is the The origin of the three-dimensional Cartesian coordinate system;

[0094] The phase difference calculation unit 220 is configured to synchronously calculate phase differences of the other three array elements relative to the first array element based on the preliminary four-element three-dimensional array.

[0095] A direction-finding model construction unit 230, configured to construct a direction-finding model according to the calculated phase difference of the other th...

Embodiment 3

[0124] In this embodiment, an implementation case of a low-orbit satellite four-element three-dimensional rectangular array is used to demonstrate its application steps and effects. In this implementation case, a phase difference synchronous measurement system is adopted, that is, a phase difference synchronous receiving and processing system is adopted, and the phase difference measurement error of each array element is 10°. In practical applications, in addition to the high requirements for direction finding accuracy near the sub-satellite point (that is, near the pitch angle of 90°), there are also certain requirements for the direction finding accuracy in the area with a pitch angle of 35° to 50°. Figure 4 It is a schematic diagram of the direction-finding accuracy contour line of the four-element three-dimensional rectangular array when γ=45° according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the direction-finding accuracy contour...

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Abstract

The invention discloses a method and a system for configuring a four-array element stereoscopic array. The method comprises: rotating the three-dimensional rectangular coordinate system where a three-array element planar array is located for any rotation angle; adding a non-coplanar fourth array element; constructing an initial four-array element stereoscopic array; simultaneously calculating the phase differences of the other three array elements from the first array element; based on the calculated phase differences of the other three array elements from the first array element, constructing a direction measuring model; using the direction measuring model to calculate the direction measuring error between the estimation value and the actual value of a to-be-measured wave direction; selecting a plurality of fourth array elements with different rotation angles; according to the direction measuring error, calculating the direction measuring precision for the to-be-measured wave direction in the expected pitch angle area; determining the rotation angle corresponding to the highest direction measuring precision as the best rotation angle; and according to the best rotation angle, constructing a final four-array element stereoscopic array. Through the construction of the four-array element stereoscopic array of the invention, the direction measuring precision for relatively low pitch angle area can be increased.

Description

technical field [0001] The invention relates to the technical field of array antenna direction finding, in particular to a method and device for constructing a three-dimensional array of four array elements. Background technique [0002] The array antenna direction finding system is an important passive direction finding equipment. Compared with the active radar system, in addition to the advantages of anti-interception and anti-jamming, it also has the advantages of high direction finding accuracy, small volume and weight, and low cost. In recent years, it has been paid attention to and has been applied to spaceborne equipment many times. Most of the commonly used direction-finding array antennas are planar arrays, that is, multiple array elements are on the same plane. In the application process, this kind of planar array can often obtain relatively ideal direction finding accuracy in the normal area of ​​the array (usually the position of the satellite sub-satellite poin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S3/48
CPCG01S3/48
Inventor 尤明懿陆安南邱焱
Owner 36TH RES INST OF CETC
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