Wide-angle broadband frequency selective surface

A frequency selective surface, large angle technology, applied in electrical components, circuits, antennas, etc., can solve the problems of large passband insertion loss, inhibition deterioration, etc., and achieve the effect of low cost, large application potential, and mature processing and preparation technology.

Active Publication Date: 2021-01-29
AIR FORCE UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for the existing band-pass frequency selective surface, for electromagnetic waves incident at a large angle, the insertion loss of the pass-band is large, and the suppression performance is deteriorated due to the appearance of grating lobes outside the band.

Method used

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Embodiment 1

[0032] The present invention provides a large-angle broadband frequency selective surface, specifically as figure 1 As shown, it includes a first dielectric substrate 101, a first metal structure array layer 201, a second dielectric substrate 102, a second metal structure array layer 202, a third dielectric substrate 103, and a third metal structure array stacked in sequence from bottom to top. layer 203 and fourth dielectric substrate 104;

[0033] The first metal structure array layer 201 , the second metal structure array layer 202 and the third metal structure array layer 203 are all formed by periodic arrangement of discrete metal patches.

[0034] Further, in this embodiment, the first dielectric substrate 101, the second dielectric substrate 102, the third dielectric substrate 103, and the fourth dielectric substrate 104 are all epoxy resin-based glass fiber cloth (FR4), and epoxy resin-based glass fiber The relative permittivity of the cloth is 4.3.

[0035] Further,...

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Abstract

The invention provides a wide-angle broadband frequency selective surface, which belongs to the technical field of electromagnetic wave frequency selective surfaces and comprises a first dielectric substrate, a first metal structure array layer, a second dielectric substrate, a second metal structure array layer, a third dielectric substrate, a third metal structure array layer and a fourth dielectric substrate which are sequentially stacked from bottom to top, and the first metal structure array layer, the second metal structure array layer and the third metal structure array layer are formedby periodically arranging discrete metal patches. According to the invention, the broadband low-frequency-transmission high-frequency-reflection type frequency selective surface is obtained through coupling of multiple layers of metal arrays; on one hand, the problem that in-band insertion loss is too large during large-angle incidence in an existing frequency selective surface technology is solved; and on the other hand, the occurrence of high-frequency grating lobes is inhibited, so that the problem that the normal work of the frequency selective surface is influenced by rapid enhancement and low-frequency rapid movement of the high-frequency grating lobes due to an overlarge incident angle is solved.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave frequency selective surfaces, and in particular relates to a large-angle broadband frequency selective surface. Background technique [0002] The frequency selective surface is a two-dimensional periodic structure composed of periodically arranged patch units or slot units. It exhibits frequency-selective filtering characteristics for the propagation of electromagnetic waves, that is, the selection characteristics change with frequency. For certain frequency bands The incident electromagnetic waves in the frequency band can all pass through, while the electromagnetic waves in other frequency bands can be completely reflected. Therefore, the frequency selective surface is also called the space electromagnetic filter, which is commonly used in the fields of hybrid radome stealth, multi-frequency antenna sub-reflector design, electromagnetic compatibility and electromagnetic shielding. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00H01P1/212
CPCH01Q15/0026H01P1/212
Inventor 闫明宝王甲富张介秋屈绍波王军郑麟随赛
Owner AIR FORCE UNIV PLA
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