Double-layer cascaded dual-polarized broadband band-absorbing frequency selective surface

A frequency-selective surface, dual-polarization technology, applied in the field of stealth radomes, can solve the problem that the suction type has not yet been reported, and achieve the effects of simple production, reduced RCS, and low cost

Active Publication Date: 2021-02-09
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The frequency selective structures with absorbing properties that have been reported so far are all band-pass type, and band-absorbing type has not been reported yet.

Method used

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  • Double-layer cascaded dual-polarized broadband band-absorbing frequency selective surface
  • Double-layer cascaded dual-polarized broadband band-absorbing frequency selective surface
  • Double-layer cascaded dual-polarized broadband band-absorbing frequency selective surface

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Embodiment Construction

[0027]The following is a further analysis of the present invention in combination with specific embodiments.

[0028]Such asfigure 1 As shown, the dual-polarization broadband band-absorbing frequency selection surface is a vertically arranged periodic structural unit, and each structural unit is seamlessly arranged including a wave-absorbing surface and a band-stop reflection wave-absorbing surface;

[0029]Such asfigure 2 As shown, the wave-absorbing surface includes a Rogers 5880 first dielectric substrate 1 with a thickness of 0.508 mm. The left surface of the dielectric substrate 1 is plated with a first metal ring 3. The metal ring 3 overlaps the center of the dielectric substrate 1, and the four sides of the metal ring 3 There are four RF resistors 2 of the same resistance welded in the center.

[0030]Such asimage 3 ,4As shown, the band-stop reflection absorbing surface includes a Rogers5880 second dielectric substrate 6 with a thickness of 0.508 mm. The left surface of the dielectric...

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Abstract

The invention relates to a double-layer cascaded dual-polarized broadband absorbing type frequency selective surface. A conventional wave absorbing frequency selective structure is designed to be a bandpass type frequency selective structure which has limited pass band width and has difficulty in covering low frequency. According to the invention, a double-ring reflective plane is adopted, a waveabsorbing ring is designed on the other surface of the reflective plane, and the double-layer cascaded dual-polarized broadband absorbing type frequency selective surface is constructed by the combination of a single-ring circuit analog absorber. Therefore, insertion loss in a low frequency passband is low, and an extremely wide absorbing band can be generated near a high frequency place.

Description

Technical field[0001]The invention belongs to the field of microwave technology, and relates to a dual-polarization broadband band-absorption low-pass frequency selection surface, which can be used as a stealth radome for low-frequency (VHF / UHF) antennas. Its potential application scenarios include integrated communication masts for warships, etc. .Background technique[0002]In current military applications, frequency selective surfaces and frequency selective structures as radomes are one of the effective ways to reduce the radar cross section. This method can effectively improve the stealth performance of combat platforms.[0003]The frequency selection surface is essentially a spatial filter, which can only filter electromagnetic waves such as specific frequency bands, polarization modes, and incident angles, but cannot absorb electromagnetic waves. Therefore, for the radome developed based on the frequency selective surface, the probe wave can only be reflected and deviated from it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/42H01Q15/00H01Q15/24H01Q17/00
CPCH01Q1/422H01Q15/0026H01Q15/24H01Q17/008
Inventor 俞伟良罗国清俞钰峰廖臻代喜望
Owner HANGZHOU DIANZI UNIV
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