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Multi-beam phased array antenna based on parabolic cylinder reflection array

A phased array antenna, parabolic cylinder technology, applied to antenna combinations, antennas, antenna arrays and other directions with different interactions, can solve the problems of poor power scheduling flexibility, large scanning angle gain drop, etc., to achieve flexible power scheduling , The number of beams is large, and the effect of meeting the objective requirements

Active Publication Date: 2019-12-13
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is how to provide a multi-beam phased array antenna based on a parabolic cylindrical reflectarray to solve the poor power scheduling flexibility and large scanning angle of the reflective phased array multi-beam antenna in the prior art. Technical issues with drastic gain drop

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  • Multi-beam phased array antenna based on parabolic cylinder reflection array
  • Multi-beam phased array antenna based on parabolic cylinder reflection array
  • Multi-beam phased array antenna based on parabolic cylinder reflection array

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Embodiment 1

[0034] An embodiment of the present invention provides a multi-beam phased array antenna based on a parabolic cylindrical reflectarray, the antenna includes: a feed source array 10 and a parabolic cylindrical reflective array, wherein,

[0035] The feed array 10 includes: a phased array composed of 8×8 transmitting and receiving common-aperture radiation elements; the feed array 10 includes two rows of 16 radiation elements 11 with a center distance of 0.7λ in total, where λ is the feed array 10 wavelengths corresponding to the operating frequency.

[0036] figure 1 A schematic structural diagram of a parabolic backplane in a multi-beam phased array antenna based on a parabolic reflectarray provided in an embodiment of the present invention; figure 1 As shown, the parabolic reflector array includes: a gold-plated copper parabolic back plate 21 and a reflection unit 22 arranged on the parabolic back plate 21, wherein the focal line of the parabolic back plate 21 It is set par...

Embodiment 2

[0047] figure 2 A schematic structural diagram of a multi-beam phased array antenna based on a parabolic reflectarray provided in an embodiment of the present invention, as shown in figure 2 As shown, the difference between Embodiment 2 and Embodiment 1 is that in order to eliminate the shielding of the beam of parabolic cylinder radiation, bias feeding is used, and the angle between the axis direction of the feed source array 10 and the horizontal line is θ 0 = 30°, the aperture is evenly illuminated, and the energy leakage at the edge of the parabolic cylinder is minimized. At the same time, the problems of gain reduction and side lobe level increase caused by occlusion of the antenna are improved, and the port matching of the antenna is improved.

[0048] Further, in order to avoid the influence of the feed source on the radiation beam characteristics of the parabolic cylinder, and at the same time ensure that the beam reflected by the metal back plate 4 will not affect ...

Embodiment 3

[0054] Figure 5 A schematic structural diagram of the feed source array 10 in a multi-beam phased array antenna based on a parabolic cylindrical reflectarray provided by an embodiment of the present invention, as shown in figure 1 As shown, the difference between Embodiment 3 and Embodiment 1 is that the feed array 10 is an active phased array, and the active antenna array of the feed array 10 includes 4 sub-arrays, and each sub-array is a line Each sub-array contains two rows of radiation units arranged in a linear array; the two rows of radiation units are arranged alternately; the two rows of radiation units in each sub-array are arranged in a triangular array, that is, one radiation unit in one row is connected to the other The distance between two adjacent radiation units in a row is the same.

[0055] The distance between adjacent sub-arrays is L=10λ; each sub-array includes several radiation units arranged in an array. In practical applications, the distance between ...

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Abstract

The embodiment of the invention provides a multi-beam phased array antenna based on a parabolic cylindrical reflection array. Each unit of a feed source array independently receives beams which are compensated by excitation by the parabolic cylindrical reflection array. The feed source array with M*N units can receive a total of M*N beams. From the inside to the outside, the parabolic cylindricalreflection array is composed of a number of reflection units, dielectric layers and metal backplanes with different phase compensation values. The reflection units can compensate the required phase toachieve incoming wave focusing according to the position of the feed source. The metal backplanes are used to reflect the plane wavefront at a feed beam forming aperture. The antenna eliminates the inherent system defect of the low elevation gain loss of the reflective phased array multi-beam antenna without adding additional aperture surface, weight and cost, realizes flexible power scheduling and beam agile shaping, has the advantages of large number of beams, wide coverage area, high radiation efficiency, strong system flexibility and strong anti-interference performance, and can meet theobjective requirements of complex communication environments and high-speed communication links.

Description

technical field [0001] The invention relates to a phased array antenna, in particular to a multi-beam phased array antenna based on a parabolic cylindrical reflection array. Background technique [0002] In the field of communication technology, antennas are particularly important as radiation windows for electromagnetic signals. In order to adapt to different communication scenarios, various antennas with different functions have been invented and applied. [0003] In order to generate high-gain and low-sidelobe spot beams in modern communication links, electric large-aperture antennas are usually required. Compared with traditional high-gain electric large-aperture antennas that cover fixed target areas, phased array multi-beam antennas not only have strong directivity, but also can Achieve wide area coverage. Common phased array multi-beam antennas include direct-radiating phased-array multi-beam antenna and reflective phased-array multi-beam antenna. It is suitable for...

Claims

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Application Information

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IPC IPC(8): H01Q19/17H01Q21/29H01Q15/16
CPCH01Q15/16H01Q19/17H01Q21/293
Inventor 郑雨阳汪伟周骏张正宇陈田黄永华李家干刘晨晨彭立军张靖张世彬郑治
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST