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Highly Selective and Angularly Stable Frequency Selective Surfaces

A frequency-selective surface and selectivity technology, which is applied in the microwave field, can solve the problems that selectivity and angle stability cannot be taken into account at the same time, and achieve the effects of simple structure, improved Q value, and improved selectivity

Active Publication Date: 2018-11-16
XIDIAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of the above-mentioned prior art, and propose a frequency selective surface with high selectivity and angular stability, which is used to solve the problem that the existing frequency selective surface cannot take into account both selectivity and angular stability

Method used

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  • Highly Selective and Angularly Stable Frequency Selective Surfaces
  • Highly Selective and Angularly Stable Frequency Selective Surfaces
  • Highly Selective and Angularly Stable Frequency Selective Surfaces

Examples

Experimental program
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Effect test

Embodiment 1

[0028] refer to figure 1 , the present invention is formed by periodic arrangement of M×N passive resonant units, wherein M≥3, N≥3.

[0029] refer to figure 2 , the passive resonant unit includes a first dielectric substrate 1, a second dielectric substrate 2, a first radiation patch 3, a second radiation patch 4, and a dielectric through hole 5; wherein the first dielectric substrate 1 and the second dielectric substrate 2 are up and down Form a stacked structure, through the stacked structure of two dielectric substrates, the Q value of the formed frequency selective surface equivalent circuit can be improved, so as to improve the selectivity of the frequency selective surface; the first dielectric substrate 1 and the second dielectric substrate 2 Both are provided with a plurality of dielectric through holes 5 penetrating up and down to improve the selectivity of the formed frequency selective surface structure; these dielectric through holes 5 are arranged in a square, a...

Embodiment 2

[0033] The structure of this embodiment is the same as that of Embodiment 1, and only the following parameters are adjusted:

[0034] The side length D of the first dielectric substrate 1 and the second dielectric substrate 2 = 5.4 mm, the thickness H = 1.5 mm; the radius RO of the dielectric through hole 5 = 0.1 mm; the distance RS between the centers of adjacent dielectric through holes = 0.5 mm; The outer side length M1=5.4mm of one side ring 31, the inner side length S1=5.3mm; the outer side length A=2.4mm of the second side ring 32, the inner side length B=2.3mm; the side of the first square patch 33 Long C=1.8mm, the diagonal length H1=2.5mm of the first regular four-pointed star gap 34, angle θ=40 °; The outer length M2=5.5mm of the third party ring 41, the inner length S2=5.4mm; The side length P=2.8mm of the two square patches 42, the diagonal length H2=3.4mm of the second positive four-pointed star gap 43, the angle

Embodiment 3

[0036] The structure of this embodiment is the same as that of Embodiment 1, and only the following parameters are adjusted:

[0037] The dimensions of the first dielectric substrate 1 and the second dielectric substrate 2 are D=5.7mm, H=2mm, the radius RO of the dielectric through hole 5=0.2mm, the distance between the centers of adjacent dielectric through holes RS=0.7mm, and the first square ring The outer side length M1 of 31=5.7mm, the inner side length S1=5.4mm, the outer side length A=2.6mm of the second square ring 32, the inner side length B=2.1mm, the side length C=2mm of the first square patch , the diagonal length H1=2.3mm of the first square star gap 34, the angle θ=45°, the outer side length M2=5.7mm of the third party ring 41, and the inner side length S2=5.4mm; the second square patch Side length P=3.1mm, the diagonal length H2=3.7mm of the second regular four-pointed star gap 43, angle

[0038] The technical effect of the present invention is further descri...

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Abstract

The invention discloses a frequency selective surface with high selectivity and angle stability, and aims to solve the technical problem that the existing frequency selective surface cannot realize high selectivity and angle stability concurrently. The frequency selective surface is formed by M*N passive resonant units arranged periodically, wherein M is greater than or equal to 3, and N is greater than or equal to 3; each passive resonant unit adopts an up-down laminated structure consisting of two layers of dielectric substrates; radiation patches of different structures are printed on the surfaces of the two layers of dielectric substrates; each dielectric substrate is provided with a dielectric through hole structure; and the high selectivity and the angle stability of the frequency selective surface are realized due to the mutual coupling between the radiation patches, the mutual coupling between the self structures of the radiation patches, and star-like gaps on the radiation patches. According to the frequency selective surface, the stop band is changed from 0dB to minus 20dB within a frequency range of 23.6-23.9GHz; meanwhile, good passband characteristic is kept within an angle range of 0-45 degrees and within a frequency range of 24-26GHz, so that the frequency selective surface can be used for the fields of reflector antennas, satellite communication and the like.

Description

technical field [0001] The invention belongs to the field of microwave technology, and relates to a frequency selective surface with high selectivity and stable angle, which can be used in reflector antennas, satellite communications and many other fields that have strict requirements on the selectivity and angle stability of the frequency selective surface. Background technique [0002] Frequency Selective Surface (FSS) is a two-dimensional periodic array structure. FSS itself does not absorb energy, but can effectively control the transmission and reflection of incident electromagnetic waves, so it can be regarded as a spatial filter. Frequency selective surface FSS has the characteristics of filtering electromagnetic waves according to frequency characteristics because of its different reflection capabilities to electromagnetic waves of different frequencies, so it plays an important role in the fields of electromagnetic compatibility, communication, and navigation. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/20H01Q15/08
CPCH01P1/2002H01Q15/08
Inventor 姜文张坤哲龚书喜张帅洪涛凌劲
Owner XIDIAN UNIV
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