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Band-absorbing broadband frequency selection structure and application thereof

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

Active Publication Date: 2017-12-22
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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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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  • Band-absorbing broadband frequency selection structure and application thereof
  • Band-absorbing broadband frequency selection structure and application thereof
  • Band-absorbing broadband frequency selection structure and application thereof

Examples

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Embodiment Construction

[0025] The present invention is further analyzed below in conjunction with specific examples.

[0026] Such as figure 1 As shown, the band-absorbing broadband frequency selective structure includes two parts in a single periodic structure. The upper part is a broadband absorbing surface, such as figure 2 As shown, including a Rogers5880 dielectric substrate 1 with a thickness of 0.508 mm, the upper surface of the dielectric substrate 1 is coated with a metal ring 3, the metal ring overlaps with the center of the dielectric substrate, and four metal rings are welded at the center of the four sides of the metal ring 3. RF resistors of the same resistance 2. The length period of the broadband absorbing surface is 1.85×8 mm, and the width period is 2×7 mm. The lower part is a broadband band stop reflective surface, such as figure 1 , image 3 and Figure 4 As shown, including a Rogers RO3010 dielectric substrate 5 with a thickness of 1.22 mm, a height of 6.2 mm, and a perio...

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Abstract

The invention relates to a band-absorbing broadband frequency selection structure and the application thereof. A traditional wave absorbing frequency selection structure is based on a method of cascading two or more two-dimensional array planes, wherein the method has narrow passband, large insertion loss and poor wave absorbing performance. According to the invention, the combination of a single metallic ring wave absorbing periodic plane and a three-dimensional band-stop periodic structure is used to build a three-dimensional broadband wave absorbing frequency selection structure, which can realize low insertion loss in passband, low-frequency wide passband and high-frequency wide wave absorbing band.

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): H01P1/20H01Q1/42
CPCH01P1/20H01Q1/42
Inventor 罗国清俞伟良俞钰峰
Owner HANGZHOU DIANZI UNIV
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