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Spatial/modal mixed diversity multi-subarray orbital angular momentum antenna design method

An orbital angular momentum and design method technology, applied in design optimization/simulation, CAD numerical modeling, geometric CAD, etc., can solve the problem of high purity requiring a large size, and achieve the effect of reducing energy difference and increasing spacing

Pending Publication Date: 2022-05-17
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0004] At present, it is very convenient for the metasurface antenna to generate multi-modal OAM waves, but it can only generate vortex waves of different modes in multiple directions or different vortex waves in different frequency bands, and high purity requires a large size

Method used

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  • Spatial/modal mixed diversity multi-subarray orbital angular momentum antenna design method
  • Spatial/modal mixed diversity multi-subarray orbital angular momentum antenna design method
  • Spatial/modal mixed diversity multi-subarray orbital angular momentum antenna design method

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Embodiment Construction

[0026] The following examples are further explanations and supplements to the present invention, and do not constitute any limitation to the present invention.

[0027] Such as figure 1 , a coplanar multi-mode multi-beam vortex wave antenna design method, comprising steps:

[0028] S1. According to the preliminary simulation of the field radiation formula of the UCA antenna, the UCA antenna circular array model of different modes is established, and the observation plane is divided to obtain the electric field amplitude, phase and mode purity of each part.

[0029] S2. First ignore the mutual coupling effect between sub-arrays, and derive the expression of the total space / modal hybrid diversity according to the UCA antenna radiation formula, and set an effective transmission distance (that is, the purity of the vortex wave within this distance can reach a certain value), multiple calculations to determine the modal aliasing and interference between the subsets in the space / mo...

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Abstract

The invention discloses a spatial / modal mixed diversity multi-subarray orbital angular momentum antenna design method, which comprises the following steps: firstly, neglecting a mutual coupling effect between subarrays, deducing an expression of spatial diversity and a structural parameter design range under an effective transmission distance, and then researching modal aliasing and influence of the subarrays on different spatial diversity based on the mutual coupling effect. And finally, the compact orbital angular momentum antenna with the optimal transmission effect is obtained by optimizing factors such as the subarray scale and the array spacing. According to the invention, the aliasing effect between the beams is reduced as much as possible, and the characteristics of high purity and low aliasing of the vortex beams are realized.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a design method for a multi-subarray orbital angular momentum antenna with space / mode hybrid diversity. Background technique [0002] With the rapid development of the wireless communication field and the huge increase of various demands, the problem of shortage of spectrum resources is becoming more and more serious. In addition to space multiplexing, time multiplexing, frequency division multiplexing and other methods, the mode division multiplexing of orbital angular momentum is gradually known to everyone. The orthogonality between modes makes it possible to theoretically have infinite modes in the same frequency band. This makes orbital angular momentum a new possibility to solve spectral problems. [0003] There are ways to generate OAM vortex waves such as spiral phase plates, metasurfaces, single antennas, etc., but they are difficult to generate multimode OAM waves, which leads ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/20G06F111/10
CPCG06F30/17G06F30/20G06F2111/10
Inventor 胡俊林本通吴文
Owner NANJING UNIV OF SCI & TECH
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