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Programmable optical delay matrix and light-operated multi-beam forming device

An optical delay and matrix technology, applied in the field of microwave photonics, can solve problems such as complex structures

Inactive Publication Date: 2021-09-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the system requires N filters to separate frequencies, and the structure is more complicated (at least two sets of such structures are required to realize multi-beam)

Method used

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  • Programmable optical delay matrix and light-operated multi-beam forming device
  • Programmable optical delay matrix and light-operated multi-beam forming device
  • Programmable optical delay matrix and light-operated multi-beam forming device

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Embodiment Construction

[0028] Aiming at the deficiencies of the existing technology, the solution idea of ​​the present invention is to construct a programmable optical delay matrix by using an optical switch array, dispersion fiber, and zero dispersion fiber, and use the switching of the optical switch to select different paths so that different wavelengths go through different lengths of dispersion Different time delays are generated after the optical fiber, thus forming beams with different directions, and the time delay is more and can be adjusted in real time. On the basis, an optically controlled multi-beam forming device with wider working bandwidth and more flexible control, which can realize multiple beams at the same time and whose beam pointing can be adjusted in real time is constructed.

[0029] The programmable optical delay matrix proposed by the present invention includes an array composed of M×N optical switches, the optical switches at the head and tail of each row are 1×2 type and ...

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Abstract

The invention discloses a programmable optical delay matrix, which comprises an array formed by M * N optical switches, wherein the optical switches at the head and the tail of each row are 1 * 2 type and 2 * 1 type respectively, and the other optical switches are 2 * 2 type, both M and N being integers greater than 2; one pair of ports of any two adjacent optical switches in each row are connected through a zero-dispersion optical fiber, and the other pair of ports of any two adjacent optical switches in each row are connected through a dispersion optical fiber; and the N-1 dispersion optical fibers in the same row have the same dispersion coefficient but different lengths, and the M dispersion optical fibers in the same column have the same length but different dispersion coefficients. The invention further discloses a light-operated multi-beam forming device. Compared with the prior art, the working bandwidth is wider, control is more flexible, multiple beams can be achieved at the same time, the beam directions are more, and real-time adjustment can be achieved.

Description

technical field [0001] The invention relates to a multi-beam forming device, in particular to an optically controlled multi-beam forming device, belonging to the technical field of microwave photonics. Background technique [0002] With the rapid increase in the capacity requirements of wireless communication systems, the MIMO system based on small-scale antennas in the 4G era has been difficult to adapt to the development trend. In the 5G era, in order to solve this problem, massive MIMO technology came into being. Compared with up to 8 antennas in 4GMIMO, massive MIMO can achieve 16, 32, 64, 128, or even larger antennas in 5G. As one of the key technologies of 5G, the most important component of massive MIMO technology is multi-beam forming. Traditional beamforming systems based on pure electronic technology have an "electronic bottleneck". Benefiting from the large bandwidth and low loss of optical components, microwave photonic multi-beamforming has the advantages of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/293G02B6/35
CPCG02B6/29392G02B6/3546
Inventor 赵雯钧李思敏潘时龙姚笑笑
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS