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Four-dimensional antenna array used for orbital angular momentum wireless communication mode

A technology of orbital angular momentum and wireless communication, which is applied in the field of antennas to achieve the effects of increasing gain, increasing energy, improving efficiency and energy utilization

Active Publication Date: 2017-02-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, each structure of the existing OAM wave generating device can only generate one mode or need to use a phase shifter to realize multiple modes

Method used

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  • Four-dimensional antenna array used for orbital angular momentum wireless communication mode
  • Four-dimensional antenna array used for orbital angular momentum wireless communication mode
  • Four-dimensional antenna array used for orbital angular momentum wireless communication mode

Examples

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Embodiment

[0029] refer to figure 1 , In this embodiment, a four-dimensional circular ring antenna array composed of 8 dipole array elements is used. The array antenna mainly includes an antenna unit, a switch, a power divider and an FPGA circuit board. In the symmetrical array structure, the antenna elements are uniformly distributed on a circular ring with a radius R=0.75λ. Each unit is controlled by a switch, and all switches are controlled by the FPGA circuit board.

[0030] By designing three different timings, the optimal timing design for the simultaneous generation of multiple OAM modes by the four-dimensional circular antenna array is given. figure 2 , image 3 All use "0-1" switches to conduct 8 units in turn, and the shaded part represents that the switch is in the conduction state. During one modulation cycle, figure 2 The timing represents that each cell is turned on for 0.125 cycles, image 3 Represents that each cell is turned on for 0.875 cycles. because figure...

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Abstract

The invention discloses a four-dimensional antenna array used for an OAM (Orbital Angular Momentum wireless communication mode. The four-dimensional antenna array in such form is a method which can generate multiple OAM modes at the same time. The basic structure of the four-dimensional ring antenna array comprises antenna units, high-speed RF switches, a power divider and an FPGA circuit board. The maximum innovation of the invention is that as consideration is given to the influence from the existence of an OAM mode weak field area to a mode transmission distance, the provided four-dimensional ring antenna array which is a method capable of generating multiple OAM modes at the same time has obvious advantages when adopting a -1-1 switching form rather than a 0-1 switching form, and as the optimal time sequence in the -1-1 switching form is provided, each switch is guaranteed to be conducted to a state 1 within a time period according to the sequence, and the time duration taken for conducting each switch to the state 1 is same. Aiming at the influence from the weak field area to the OAM mode transmission, a relationship among the size of a receiving area, a distance between the receiving area to the antennas and an accurate calculation mode is given to bring convenience to accurate reception of a needed mode.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a four-dimensional antenna array, in particular to a four-dimensional antenna array used in an orbital angular momentum wireless communication mode. Background technique [0002] Traditional antenna arrays can be regarded as radiation sources distributed in three-dimensional space. The four-dimensional antenna array is a new type of array antenna formed by introducing the time variable as the fourth dimension parameter into the traditional antenna array. It can realize the amplitude and phase weighting of array elements in the traditional antenna array by means of time weighting, thus greatly simplifying the design of the feeding network. Compared with the traditional antenna array, the four-dimensional antenna array has many design advantages, such as low sidelobe pattern, beam scanning without phase shifter, multi-beam forming, wide-angle range direction finding, launch Signal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q3/26H01Q21/00
CPCH01Q3/2605H01Q21/0006
Inventor 杨仕文孙超陈益凯过继新屈世伟聂在平
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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