Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A large-angle broadband frequency-selective surface

A technology with a frequency selective surface and a large angle, which can be used in antennas, circuits, waveguide-type devices, etc., to solve the problems of large passband insertion loss and deterioration of inhibition, achieve low cost, inhibit the occurrence of high-frequency grating lobes, and process The effect of mature preparation process

Active Publication Date: 2022-04-15
AIR FORCE UNIV PLA
View PDF10 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A large-angle broadband frequency-selective surface
  • A large-angle broadband frequency-selective surface
  • A large-angle broadband frequency-selective surface

Examples

Experimental program
Comparison scheme
Effect test

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,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
electrical conductivityaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a large-angle broadband frequency selective surface, which belongs to the technical field of electromagnetic wave frequency selective surface, and includes a first dielectric substrate, a first metal structure array layer, a second dielectric substrate, and a second metal structure stacked in sequence from bottom to top The array layer, the third dielectric substrate, the third metal structure array layer and the fourth dielectric substrate; the first metal structure array layer, the second metal structure array layer and the third metal structure array layer are all formed by periodic arrangement of discrete metal patches to make. The present invention obtains a broadband low-frequency transmission high-frequency reflective frequency selective surface through the coupling of multi-layer metal arrays; on the one hand, it solves the problem of excessive in-band insertion loss when incident at a large angle in the existing frequency selective surface technology; On the other hand, the occurrence of high-frequency grating lobes is suppressed, thereby solving the problem that the high-frequency grating lobes are rapidly enhanced and rapidly moved to low frequencies due to an excessively large incident angle, which affects the normal operation of the frequency selective surface.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com