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High angular stability frequency selective surface based on 2.5d braided structure

A frequency selective surface and stability technology, applied in the field of antenna and wireless communication, can solve the problems of insufficient angular stability and reduction of equivalent electrical length, etc., to achieve the reduction of equivalent electrical size and resonance frequency point Offset, the effect of improving angular stability

Active Publication Date: 2019-11-15
XIDIAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the patch on the passive resonant unit adopts a planar structure, the equivalent electrical length will decrease under the irradiation of obliquely incident electromagnetic waves at a high angle. shift, the angular stability is not high enough

Method used

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  • High angular stability frequency selective surface based on 2.5d braided structure
  • High angular stability frequency selective surface based on 2.5d braided structure
  • High angular stability frequency selective surface based on 2.5d braided structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] refer to figure 1 , a frequency selective surface with high angular stability based on a 2.5D braided structure, including M×N frequency selective surface units arranged periodically, M=20, N=20. The passive resonant unit is a regular hexagonal prism unit, and the frequency selection surface composed of it is a honeycomb structure.

[0037] refer to figure 2 , the frequency selective surface unit includes a dielectric plate 1 with a regular hexagonal cross-sectional shape, a first metal patch 2 printed on the upper surface of the dielectric plate 1, a second metal patch 3 on the lower surface, and a metallized via hole 4 ,in:

[0038] The dielectric plate 1 has a side length of P=5mm, a thickness of h=1.5mm, and a relative permittivity of 4.4.

[0039] The first metal patch 2 has a structure such as image 3 As shown, it consists of six first strip groups 21 , and each first strip group 21 is composed of one open ring strip 211 and two first short strips 212 . The...

Embodiment 2

[0049] This example has the same structure as Example 1, only the following parameters have been adjusted:

[0050] M×N frequency selective surface units arranged periodically, M=6, N=6; the side length of the dielectric plate 1 is P=4.5mm, and the thickness h=1.5mm; the short side length L1 of the open ring strip 211=0.9mm , the length of the short strip is S=0.2mm; the length of the two parallel long strips of the quasi-V-shaped strip 311 is n1=1.5mm, and the distance is d=0.5mm; the radius of the metallized via hole 4 is R=0.1mm, and the center and The distance from the nearest edge of the dielectric plate 1 is g=0.2mm.

Embodiment 3

[0052] The structure of this example is the same as that of Example 1, and only the following parameters have been adjusted:

[0053] M×N frequency selective surface units arranged periodically, M=10, N=10; the side length of the dielectric plate 1 is P=9mm, the thickness h=2.5mm; the short side length L1=1.5mm of the open annular strip 211, The length of the short strip is S=0.45mm; the length of the two parallel long strips of the quasi-V-shaped strip 311 is n1=3.5mm, and the distance is d=1mm; the radius of the metallized via hole 4 is R=0.3mm, and the center and the nearest The edge distance of the dielectric plate 1 is g=0.3 mm.

[0054] Below in conjunction with simulation experiment, technical effect of the present invention is described further:

[0055] 1. Simulation conditions and content:

[0056] Utilize commercial simulation software HFSS_17.0 to carry out simulation calculation to the transmission coefficient under the different incident angles of embodiment 1,...

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Abstract

The invention provides a 2.5D braided structure-based high-angular stability frequency selective surface and aims at improving the angular stability of the frequency selective surface. The 2.5D braided structure-based high-angular stability frequency selective surface comprises M*N passive resonance units, wherein each passive resonance unit comprises a dielectric slab, a first metal patch printedon the upper surface of the dielectric slab, a second metal patch printed on the lower surface of the dielectric slab, and metallized through holes; each first metal patch comprises six rotational symmetric first strip groups; each second metal patch comprises six rotational symmetric second strip groups; various strips in the second strip groups are located in gaps, in corresponding positions onthe lower surface, of various corresponding strips in the first strip groups; and the strips in the first metal patches and the second metal patches are connected through the corresponding metallizedthrough holes which penetrate through the dielectric slabs to form a 2.5D braided structure. According to the 2.5D braided structure-based high-angular stability frequency selective surface, good angular stability is achieved on the basis of miniaturization, and the 2.5D braided structure-based high-angular stability frequency selective surface can be applied to the aspects of communications andradars.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a frequency selective surface, in particular to a frequency selective surface with high angular stability based on a 2.5D braided structure, which can be used in the technical field of wireless communication. Background technique [0002] 2.5D structure in the field of antennas means that the structure content on a plane can be fully represented by two mutually perpendicular in-plane coordinate axes, and the structure in a plane perpendicular to this can be completely represented by only one in-plane coordinate axis. The three-dimensional structure represented by is widely used in the design of low-profile antennas. Compared with the traditional planar structure, the 2.5D structure can make full use of the limited space, and this characteristic can also be applied to the frequency selective surface. [0003] Frequency Selective Surface (FSS) is a special spatial filter, which is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/0093
Inventor 姜文崔岳陈帅洪涛龚书喜
Owner XIDIAN UNIV
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