Method and device for testing purity of vortex waves generated by antenna array

An antenna array and testing antenna technology, applied in the field of communication, can solve the problems of unrealistic circular antenna array and non-existence of perfect target vortex electromagnetic waves.

Pending Publication Date: 2020-05-12
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
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Problems solved by technology

However, limited by the actual manufacturing conditions and production process, it is impractical to manufacture a perfect circular antenna array, so the perfect target vortex electromagnetic wave does not exist

Method used

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  • Method and device for testing purity of vortex waves generated by antenna array
  • Method and device for testing purity of vortex waves generated by antenna array
  • Method and device for testing purity of vortex waves generated by antenna array

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0030] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention shall have the usual meanings understood by those skilled in the art to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "connected" are not limited to physical or mechan...

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Abstract

The invention discloses a method and device for testing the purity of vortex waves generated by an antenna array. The method comprises the steps of: generating a vortex wave amplitude image accordingto vertically received vortex waves generated by the antenna array; utilizing an OAM spectrum analysis method of vortex waves to analyze the vortex wave amplitude image to obtain the amplitude of vortex waves of each modal component; and calculating the purity of target vortex waves generated by the antenna array according to the amplitude of the vortex waves of each modal component. By applying the device and the method, the purity of the vortex waves generated by the antenna array can be tested, and whether the produced antenna array reaches standards or not can be conveniently and accurately analyzed.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and a device for testing the purity of vortex waves generated by an antenna array. Background technique [0002] In electrodynamics, orbital angular momentum (OAM) is another fundamental physical quantity besides spin angular momentum (SAM). Vortex electromagnetic wave (RF-OAM) is a kind of electromagnetic wave with spatial spiral phase distribution. In 1992, Allan et al. proposed that the expression of Laguerre-Gaussian beam contains the OAM term of azimuth angle. Since then, the beam containing OAM has quickly become Hotspots of research by scientists. In 2007, Tride et al. theoretically used a phased array loop antenna array to generate radio waves carrying orbital angular momentum at a frequency of 2.4 GHz, and verified that electromagnetic waves with OAM can also be generated in the radio frequency band, while providing A method of generating vortex electrom...

Claims

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Application Information

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IPC IPC(8): G01R23/16
CPCG01R23/16
Inventor 黄善国高欣璐马景灿宋锡耀郑桢楠
Owner BEIJING UNIV OF POSTS & TELECOMM
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