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Ultra-wideband frequency selective surface unit based on low-pass and band-pass multi-layer coupling

A frequency selective surface, ultra-wideband technology, applied in the direction of radiation unit housing, electrical components, antenna components, etc., can solve the problem of low selectivity of ultra-wideband frequency selective surface, poor angular stability, lack of ultra-wideband frequency selective surface Design rules and methods, etc., to achieve the effect of improving selection characteristics, enhancing symmetry, and improving stability

Active Publication Date: 2019-03-08
宋应龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing research, we can see some frequency-selective surfaces based on low-pass and high-pass multi-layer coupling structures to realize UWB functions. Not high, that is, the frequency range corresponding to the transition band on both sides of the passband is often wide, and its angular stability is not good, generally only stable ultra-wideband performance of 30-degree oblique incident waves can be achieved
In addition, there is still a lack of rules and methods for the design of UWB frequency-selective surfaces

Method used

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  • Ultra-wideband frequency selective surface unit based on low-pass and band-pass multi-layer coupling

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Embodiment 1

[0026] Embodiment 1: a kind of ultra-broadband frequency selective surface unit based on low-pass and band-pass multilayer coupling, comprising three layers of metal plates and two layers of dielectric plates, two layers of dielectric plates are respectively arranged between the three layers of metal plates; the first The metal plate on the first layer and the metal plate on the third layer have the same structure and both have low-pass characteristics, and the metal plate on the second layer has band-pass characteristics. like Figures 1 to 3 As shown, the horizontal cross-section of the UWB frequency selective surface unit is an equilateral triangle, and the first metal plate is composed of 60-degree fan-shaped metal patches located at the three corners of the equilateral triangle. The second layer of metal plate is composed of the outer regular triangle ring, the regular triangle metal patch located inside the outer regular triangle ring and the center overlaps, and there i...

Embodiment 2

[0029] Embodiment 2: a kind of ultra-broadband frequency selective surface unit based on low-pass and band-pass multilayer coupling, comprising three layers of metal plates and two layers of dielectric plates, two layers of dielectric plates are respectively arranged between the three layers of metal plates; the first The metal plate on the first layer and the metal plate on the third layer have the same structure and both have low-pass characteristics, and the metal plate on the second layer has band-pass characteristics. like Figures 9 to 11 As shown, the horizontal cross-section of the UWB frequency selective surface unit is a square, and the first metal plate is composed of 90-degree fan-shaped metal patches located at the four corners of the square. The second layer of metal plate is composed of an outer square ring, a square metal patch located inside the outer square ring and overlapping in the center, and a square annular hollow channel is left between the outer squar...

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Abstract

The invention discloses an ultra-wideband frequency selective surface unit based on low-pass and band-pass multilayer coupling. The ultra-wideband frequency selective surface unit comprises three layers of metal plates and two layers of dielectric plates, wherein the two layers of dielectric plates are arranged between the three layers of metal plates respectively; and the structure of the first layer of metal plate and the structure of the third layer of metal plate are the same and have low-pass characteristics, and the second layer of metal plate has band-pass characteristics. The low-passand band-pass metal layers are connected through the dielectric substrates with certain parameters, and ultra-wideband frequency response characteristics can be achieved through adjusting a distance between the metal layers, namely the thickness of the dielectric plate.

Description

technical field [0001] The present invention relates to a frequency selective surface (FSS for short), in particular to an ultra-wideband frequency selective surface unit based on low-pass and band-pass multilayer coupling. Background technique [0002] The frequency selective surface is generally a one-dimensional or two-dimensional periodic structure, which is a kind of spatial filter and has different selection characteristics for the frequency and polarization of electromagnetic waves. With the development of stealth and anti-stealth technology, the demand for ultra-wideband stealth radome is more and more urgent, and the frequency selective surface technology is often used in stealth radome. [0003] In the existing research, we can see some frequency-selective surfaces based on low-pass and high-pass multi-layer coupling structures to realize UWB functions. Not high, that is, the frequency range corresponding to the transition band on both sides of the passband is oft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00H01Q1/42
CPCH01Q1/422H01Q15/0026
Inventor 宋应龙
Owner 宋应龙