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Stereo array antenna based on double directed circular arrays and construction method of antenna

A three-dimensional array and circular array technology, which is applied to the directions of antenna arrays, antennas, and antenna arrays that are energized separately, can solve the problems of weak directional directivity and low direction finding accuracy, and achieve good results, high direction finding accuracy, and suitable strong effect

Active Publication Date: 2018-04-17
36TH RES INST OF CETC
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  • Application Information

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Problems solved by technology

[0005] In view of the above analysis, the present invention proposes a three-dimensional array antenna based on a directional double circular array and its construction method, and uses a directional high-gain narrow-beam three-dimensional array antenna to solve the problem of low accuracy of direction finding or direction directivity in areas with lower elevation angles. not strong problem

Method used

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  • Stereo array antenna based on double directed circular arrays and construction method of antenna
  • Stereo array antenna based on double directed circular arrays and construction method of antenna
  • Stereo array antenna based on double directed circular arrays and construction method of antenna

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Embodiment 1

[0060] Disclosed is a stereoscopic array antenna based on a directional double circular array, which includes two non-coplanar planar directional circular arrays with identical configurations.

[0061] Such as figure 1 As shown, it is a schematic diagram of a plane-oriented five-element circular array (circular array 1). The plane-oriented five-element circular array is composed of five identical high-gain narrow beam array elements (array element 1 to array element 5) uniformly distributed, and the radius r of the circular array is from the center of the circular array to the center of any element in the circular array The distance (radius r greater than half the wavelength of the received signal).

[0062] Such as figure 2 As shown, the three-dimensional array antenna based on the directional double circular array described in this embodiment is composed of a circular array 1 and a circular array 2, and the circular array 1 and the circular array 2 are completely the same...

Embodiment 2

[0065] Disclosed is a method for constructing a three-dimensional array antenna based on a directional double circular array, such as image 3 As shown, it specifically includes the following steps:

[0066] Step S1, establishing a coordinate system for the stereoscopic array of the directional double circular array.

[0067] The establishment of a coordinate system is used to establish an expression standard for subsequent direction finding model construction.

[0068] Specifically, such as Figure 4 As shown, the line connecting the center of the array element 1 and the center of the array element 5 in the circular array 1 is the X axis, and the vertical line passing through the center of the array element 3 as the X axis is the y axis, and the intersection point of the X axis and the y axis is The origin O and the Z axis are determined by the X axis and the Y axis according to the right-hand spiral rule. The angle between the projection of the direction of arrival vector...

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Abstract

The invention relates to a stereo array antenna based on double directed circular arrays and a construction method of the antenna. The stereo array antenna comprises two identical planar circular arrays, each planar circular array comprises array elements, an adjustable included angle gamma is formed between the planes of the two circular arrays, an intersecting line between the planes of the twocircular arrays does not pass the center of any an array element of the two circular arrays, the array elements of the two circular arrays are distributed symmetrically by taking the intersecting lineas the center, and the distance from the circular center of each circular array to the intersecting line is d; and the included angle gamma is determined according to the relation between a direction-finding error in a theoretical direction of arrival and the included angle gamma. A construction method of the stereo array antenna comprises the steps of establishing a coordinate system, establishing a direction finding model, establishing a direction finding error model and determining the stereo array antenna. The stereo array antenna is constructed on the basis of a narrow wave beam directedarray, and the direction finding precision in specific low-elevation-angle area is improved effectively on the basis that the direction finding precision in a traditional five-element circular arraylarge-elevation-angle area is not reduced.

Description

technical field [0001] The invention relates to the field of array antenna direction finding, in particular to a three-dimensional array antenna based on a directional double circular array and a construction method thereof. 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 process of application, this kind of planar array can often obtain relatively ideal direction finding accuracy in the area normal to the array (usually the position of the sub-satell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/00H01Q21/06G06F17/50
CPCG06F30/20H01Q21/00H01Q21/0087H01Q21/06
Inventor 陆安南尤明懿邱焱
Owner 36TH RES INST OF CETC
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