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Low sidelobe vortex beam generation method based on multi-ring array

A generation method and array technology, which are applied to antenna arrays, devices for manufacturing antenna arrays, antenna arrays that are powered independently, etc., can solve the problems of increasing vortex beam sidelobe gain and reducing orbital angular momentum communication quality, etc., to achieve enhanced integrity The effect of reducing the beam divergence angle and improving the communication quality

Active Publication Date: 2021-01-05
XIDIAN UNIV
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Problems solved by technology

The traditional generation method is to increase the aperture of the array antenna to suppress the beam divergence angle and reduce the difficulty of receiving modal information. However, the realization of this method also increases the sidelobe gain of the vortex beam and reduces the orbital angle. Momentum Communication Quality

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  • Low sidelobe vortex beam generation method based on multi-ring array
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  • Low sidelobe vortex beam generation method based on multi-ring array

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:

[0032] refer to figure 1 , the multi-ring array used in the present invention includes N concentric ring-shaped arrays, and the i-th ring-shaped array includes M i Microstrip antenna elements uniformly distributed along the circumference, i=1,2,...,N, N≥2, M i+1 ≥ M i ≥4. This embodiment selects but is not limited to N=2 ring-shaped arrays to form a multi-ring array, and the first ring-shaped array 1 and the second ring-shaped array 2 each include eight microstrip antenna units uniformly distributed along the circumference ,M 1 = M 2 =8, the central operating frequency of each microstrip antenna unit is f=3.9GHz.

[0033] refer to figure 2 , the present invention is based on the multi-ring array low sidelobe vortex beam generation method, comprising the following steps:

[0034] Step 1, determine the parameters for generating the vortex beam. ...

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Abstract

The invention provides a low sidelobe vortex beam generating method based on a multi-ring array, and is used for solving the problem that the existing vortex beam generating method suppresses a divergence angle, leading to excessively high sidelobes. The implementation scheme comprises the following steps of determining modal value l generating the vortex beam, a scan parameter Ri(q) of the radiusof the ith annular array, and azimuth excitation Him and position vectors of each of the micro-strip antenna units according to an orbital angular momentum theory; constructing an array factor ci(theta, phi) of the ith annular array by using the determined parameters according to the array antenna theory; constructing a vortex wave pattern function F(theta) according to the principle of electricfield superposition; and determining a scan parameter Ri(q') of the lowest sidelobe power according to F(theta). The low sidelobe vortex beam generating method provided by the invention realizes the generation of low sidelobe vortex beams, enhances the integrity of modal information transmission, improves the communication quality of the orbital angular momentum, and can be used for wireless communication and radar imaging.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a method for generating a low sidelobe vortex beam, which can be used in a communication system. Background technique [0002] With the rapid development of communication technology, expanding the channel capacity of wireless communication has become the main goal to solve spectrum congestion. The modal multiplexing characteristics of vortex beams carrying orbital angular momentum bring broad prospects for channel capacity expansion. In 2007, the team of Prof. B.Thide in Sweden successfully generated vortex beams by means of array antennas, which was the first application in the field of wireless communication. As a result, orbital angular momentum vortex waves have gradually become a research hotspot today. Different from plane waves, the rotation factor carried by vortex waves makes the wavefront characteristic as a spiral phase plane around the transmission axis, and the mod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q21/00H01Q21/29H01Q21/20
CPCH01Q21/0087H01Q21/20H01Q21/293
Inventor 李龙郑雨珊冯强薛皓席瑞邵庆瑶
Owner XIDIAN UNIV
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