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A Sampling Reception Method for Radio Frequency Orbital Angular Momentum Mode Demultiplexing

A technology of orbital angular momentum and mode demultiplexing, which is applied in the field of sampling and reception of radio frequency orbital angular momentum mode demultiplexing, can solve the problems of inconvenient transportation, installation, difficult preparation and high cost, and achieves the promotion of practicality and flexible distribution. , reduce the effect of preparation

Active Publication Date: 2017-10-13
ZHEJIANG UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Large-aperture receivers are not only expensive, but also difficult to prepare, and inconvenient to transport and install
Moreover, the aperture size of any receiver is limited, which greatly limits the number of multiplexing of multiple OAM systems

Method used

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  • A Sampling Reception Method for Radio Frequency Orbital Angular Momentum Mode Demultiplexing
  • A Sampling Reception Method for Radio Frequency Orbital Angular Momentum Mode Demultiplexing
  • A Sampling Reception Method for Radio Frequency Orbital Angular Momentum Mode Demultiplexing

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Embodiment Construction

[0013] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0014] figure 1 is the intensity distribution diagram of the orbital angular momentum beam with the topological charges l being 2, 3, 4, and the black in the center is the energy zero region. Obviously, the larger the topological charge l is, the larger the radius of the region where the central energy is zero. In order to improve the receiving efficiency, the size of the receiving aperture at the receiving end needs to be selected at the energy of the main lobe of the beam. The more the number of multiplexing channels, the larger the topological charge l, and the larger the receiving aperture of the receiving end. This condition limits the practical application of orbital angular momentum beams.

[0015] figure 2 A model for sampled reception is given. On the plane perpendicular to the main axis of orbital angular momentum beam propagation, take 1 / n arcs of con...

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Abstract

The invention discloses a sampling receiving method for radio frequency orbital angular momentum mode demultiplexing. Aiming at the high cost and large volume of the complete receiving scheme of the orbital angular momentum beam, which is not conducive to the problem of mode multiplexing, the sampling reception method is for a multiplexing beam composed of p topological charges li satisfying certain rules of radio frequency orbital angular momentum waves. Vertical to the plane of the main axis of beam propagation, p antennas are evenly arranged on a 1 / n arc concentric with the main axis of propagation, and the angular spacing of the antennas is 2π / np. If p topological charges li satisfy li=l+nm, l is any orbital angular momentum topological charge, m is an integer, and the absolute value of the difference between any two topological charges is less than (p‑1)n, then p The sampling reception of the antenna can realize the mode demultiplexing of the multiplexing beam composed of the group of p orbital angular momentums, and the crosstalk between the modes is small.

Description

technical field [0001] The invention relates to the field of radio frequency orbital angular momentum beam mode demultiplexing, in particular to a sampling receiving method for radio frequency orbital angular momentum mode demultiplexing. Background technique [0002] As the world enters the mobile Internet era, the spectrum gap for mobile communication services is becoming increasingly serious. Due to the limited high-quality spectrum resources in the low frequency band, it is difficult to meet the new demands of mobile communications only by allocating new spectrum. At present, the expansion of information capacity based on the dimensions of frequency spectrum, phase, and amplitude of electromagnetic waves has been fully developed and utilized. It is a major scientific and technical challenge to find new physical parameter dimensions to realize electromagnetic wave communication technology and meet the demand of order-of-magnitude increase in communication capacity within...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08
Inventor 郑史烈陈弋凌章献民金晓峰池灏
Owner ZHEJIANG UNIV
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