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Dual frequency fss with closely spaced frequency response characteristics and its unit structure

A technology of interval frequency and response characteristics, applied in the field of dual-frequency FSS and its unit structure, can solve the problems of large size, large resonance response interval, unable to meet the requirements of FSS, etc., and achieve good angular stability and good polarization stability. Effect

Active Publication Date: 2021-09-03
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing multi-frequency system, the resonance response interval is too large, which cannot meet the needs of FSS in practical applications; and the existing multi-frequency FSS structural unit size is relatively large, which does not meet the current trend and demand for miniaturized structures

Method used

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  • Dual frequency fss with closely spaced frequency response characteristics and its unit structure
  • Dual frequency fss with closely spaced frequency response characteristics and its unit structure
  • Dual frequency fss with closely spaced frequency response characteristics and its unit structure

Examples

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Effect test

Embodiment 1

[0038] See figure 1 and figure 2 , figure 1 It is a perspective view of a dual-frequency FFS unit structure with closely spaced frequency response characteristics provided by an embodiment of the present invention; figure 2 It is a side view of a dual-frequency FFS unit structure with closely spaced frequency response characteristics provided by an embodiment of the present invention. The dual-frequency FFS unit structure includes a metal layer 1 and a dielectric substrate 2 , and the metal layer 1 is disposed on the dielectric substrate 2 . In this embodiment, the upper surface of the dielectric substrate 2 has a square structure with a size of 8mm*8mm. In addition, the thickness of the metal layer 1 is in the range of 0.017mm-0.035mm, and the thickness of the dielectric substrate 2 is 1mm. Compared with the existing FFS unit, the size of the dual-frequency FFS unit structure in this embodiment is very small, meeting the current trend of pursuing miniaturization of devi...

Embodiment 2

[0047] On the basis of the above embodiments, this embodiment provides a dual-frequency FFS with closely spaced frequency response characteristics. See Figure 4 , Figure 4 It is a perspective view of a dual-frequency FFS with closely spaced frequency response characteristics provided by an embodiment of the present invention. The dual-frequency FFS includes M×N periodically arranged dual-frequency FFS unit structures as described in Embodiment 1, wherein M and N are integers greater than or equal to 1. In this embodiment, the dual-frequency FFS includes 6×6 unit structures. In other embodiments, the dual-frequency FFS may also include other numbers of unit structures, such as 10×10, 20×20, 40×40 ,even more.

[0048] As mentioned above, the dual-frequency FFS is formed by the periodic arrangement of the dual-frequency FFS unit structure described in the first embodiment, that is, the adjacent dielectric substrates 2 are closely attached. Since the distance between the fou...

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Abstract

The invention discloses a dual-frequency FSS with closely spaced frequency response characteristics and a unit structure thereof, the unit structure includes a metal layer and a dielectric substrate, the metal layer is arranged on the dielectric substrate; the metal layer includes a bow A shape ring-shaped metal patch and a square ring metal patch, wherein the square ring metal patch surrounds the outer circumference of the bow-shaped ring metal patch, and the square ring metal patch is The center coincides with the center of the bow-shaped annular metal patch; the bow-shaped annular metal patch is connected end to end by a plurality of bow-shaped metal units to form a center-symmetric annular structure. The dual-frequency FSS includes M×N periodically arranged unit structures. The dual-band FSS has dual-band band-stop characteristics, which can achieve band-stop effects on the frequency bands 5.59-6.51GHz and 7.43-9.61GHz at a depth of ‑10dB, with excellent polarization stability and angular stability, and a small size , to meet the needs of device miniaturization.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic fields and microwaves, and in particular relates to a dual-frequency FSS with closely spaced frequency response characteristics and a unit structure thereof. Background technique [0002] Frequency Selective Surface (FSS) is a single-screen or multi-screen periodic array structure composed of a large number of passive resonant units, which can effectively control the reflection and transmission of electromagnetic waves. When the electromagnetic wave is incident on the frequency selective surface, the performance out of band-pass or band-stop characteristics. A frequency selective surface is essentially a spatial filter. The structure of FSS is mainly composed of a dielectric substrate and a metal array covering the surface of the dielectric. The dielectric substrate mainly plays a supporting role to enhance the mechanical strength of the entire FSS structure, and the metal array makes the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/0013
Inventor 相征李毅任鹏陈瑞洁
Owner XIDIAN UNIV
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