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Three-dimensional novel band absorption type broadband frequency selection structure

A new type of frequency selection technology, applied in the microwave field, can solve the problems of band-absorption type that have not been reported yet, and achieve the effect of simple production, low insertion loss, and wide and low-frequency passband characteristics

Active Publication Date: 2018-03-13
HANGZHOU DIANZI UNIV
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  • 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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  • Three-dimensional novel band absorption type broadband frequency selection structure
  • Three-dimensional novel band absorption type broadband frequency selection structure
  • Three-dimensional novel band absorption type broadband frequency selection structure

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Embodiment Construction

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

[0028] The three-dimensional novel band-absorbing broadband frequency selective structure of the present invention is a periodic structure, and each structural unit includes a band-stop channel and a wave-absorbing channel;

[0029] The absorbing channel is composed of a first metal surface 11 on the lower surface of the first dielectric substrate 1, a capacitor, two resistors, a metal reflection surface, a third dielectric substrate 5 and a third metal surface 12 on the lower surface thereof, and It is composed of a metal wire 2 and a microstrip line 7. The metal wire 2 is arranged between the first metal surface 11 and the microstrip line 7, that is, as an electromagnetic wave incident surface, and the metal wire 2 is welded with a capacitor 3 and a first resistor 4; the microstrip line 7 is arranged on the third dielectric substrate 5 The upper surface, wider than the metal wire...

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Abstract

The invention relates to a three-dimensional novel band absorption type broadband frequency selection structure. The conventional wave-absorbing type frequency selection structure is based on two or more two-dimensional array planes in a cascaded manner, and consequently, narrow passband, high insertion loss and not excellent wave-absorbing performance are caused. The three-dimensional broadband wave-absorbing frequency selection structure is established by adoption of a mode of a band elimination channel in combination with a wave-absorbing channel structure, so that low insertion loss in lowfrequency passband, and high frequency broad wave-absorbing band can be realized; and the structure has high wave-absorbing efficiency and extremely high angle stability.

Description

technical field [0001] The invention belongs to the field of microwave technology, and relates to a broadband microwave-absorbing frequency selection structure, 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 and the like. Background technique [0002] In current military applications, various combat platforms have higher and higher requirements for stealth performance. As an important part of the electronic warfare system, the antenna makes a huge contribution to the radar cross section. Therefore, the reduction of the radar scattering area of ​​the antenna plays a decisive role in improving the stealth performance of the entire platform. Among the methods for reducing the radar scattering area of ​​various antennas, the frequency selective surface radome is a relatively novel solution. [0003] As a kind of spatial filter, the frequency selective surfac...

Claims

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Application Information

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IPC IPC(8): H01Q15/00H01Q17/00
CPCH01Q15/0053H01Q17/008
Inventor 俞钰峰俞伟良罗国清
Owner HANGZHOU DIANZI UNIV
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