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Ultra-wide passband frequency selective surface with improved angular stability

A frequency selective surface and stability technology, applied in the direction of circuits, waveguide devices, electrical components, etc., to achieve high practical value and reduce offset effects

Active Publication Date: 2020-01-21
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the deficiencies of the above-mentioned prior art, the object of the present invention is to provide an ultra-wide passband frequency selective surface with improved angular stability and its design method, so as to solve the problem that the frequency selective surface in the prior art cannot be well used for the stealth of the aircraft. The present invention ensures that the frequency-selective structure has ultra-wide passband characteristics, and can be freely combined with structures such as skins, shells, and protective covers with most thicknesses, so as to exert its unique electrical properties

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  • Ultra-wide passband frequency selective surface with improved angular stability
  • Ultra-wide passband frequency selective surface with improved angular stability
  • Ultra-wide passband frequency selective surface with improved angular stability

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[0043] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

[0044] refer to Figures 1 to 6 As shown, an ultra-wide passband frequency selective surface with improved angular stability of the present invention is composed of five layers, which are respectively: the first metal patch layer 1, the first intermediate dielectric layer 4, and the second metal patch layer 2. The second intermediate dielectric layer 5, the third metal patch layer 3, and the five layers are sequentially pressed together, wherein the first metal patch layer 1 and the third metal patch layer 3 have the same structure, and their units It is a rectangle with the same length and width. The center of the unit is a rectangular patch smaller than the unit size and the same length an...

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Abstract

The invention discloses an ultra-wide passband frequency selective surface with improved angular stability and a design method thereof. The frequency selective surface is composed of five layers, namely: a first metal patch layer, a first intermediate dielectric layer, and a second metal patch layer. The patch layer, the second intermediate dielectric layer, and the third metal patch layer are pressed together in sequence. The invention ensures that the frequency selection structure has ultra-wide passband characteristics, and at the same time has stable performance in the case of large-angle incidence, and can be freely combined with structures such as skins, shells, and protective covers with most thicknesses , has high practical value.

Description

technical field [0001] The invention belongs to the field of electromagnetic field and microwave technology, and specifically refers to an ultra-wide passband frequency selective surface with angular stability and a design method thereof. Background technique [0002] A frequency selective surface (FSS) is a periodic structure composed of metal patches arranged regularly on a dielectric layer. When the frequency of the incident electromagnetic wave is at the resonant frequency of the frequency selective surface unit, the FSS exhibits total reflection (patch type) or total transmission (aperture type), and electromagnetic waves of other frequencies can pass through the FSS (patch type) or be totally reflected (aperture type), so FSS is essentially a special spatial filter that can effectively control the transmission characteristics of electromagnetic waves. By applying the FSS technology to the radome, the radome can obtain the function of frequency selection and perform fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/20H01P11/00
CPCH01P1/20H01P11/007
Inventor 何小祥华博宇杨阳郑景明冒晨阳刘婷
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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