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Double-layer cascaded dual-polarized broadband absorbing type 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: 2018-10-19
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 absorbing type frequency selective surface
  • Double-layer cascaded dual-polarized broadband absorbing type frequency selective surface
  • Double-layer cascaded dual-polarized broadband absorbing type frequency selective surface

Examples

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Embodiment Construction

[0027] The present invention is further analyzed below in conjunction with specific examples.

[0028] Such as figure 1 As shown, the dual-polarized broadband band-absorbing frequency selective 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 absorbing surface;

[0029] Such as figure 2 As shown, the wave-absorbing surface includes a Rogers5880 first dielectric substrate 1 with a thickness of 0.508 mm. The left surface of the dielectric substrate 1 is coated with a first metal ring 3. The metal ring 3 overlaps with the center of the dielectric substrate 1. The four sides of the metal ring 3 A total of four radio frequency resistors 2 with the same resistance value are welded at the center.

[0030] Such as image 3 , 4 As shown, the band-stop reflective wave-absorbing surface includes a Rogers5880 second dielectric substrate 6 with a thickness of 0.508 m...

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PUM

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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-polarized broadband band-absorbing low-pass frequency selective surface, which can be used as a stealth radome for low-frequency (VHF / UHF) antennas, and its potential application scenarios include integrated communication masts for warships, etc. . Background technique [0002] In current military applications, using frequency selective surfaces and frequency selective structures as radomes is one of the effective ways to reduce the radar cross section, and this method can effectively improve the stealth performance of combat platforms. [0003] The frequency selective 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 detection wave can only ...

Claims

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Application Information

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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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