Three-dimensional broadband absorption-type frequency selection structure based on ferrite wave-absorbing material

A microwave-absorbing material and frequency selection technology, applied in the microwave field, can solve the problems of increasing AFSS processing costs and reducing reliability, and achieve the effects of clear design principles, reduced processing costs, and reduced complexity

Inactive Publication Date: 2019-10-25
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Soldering of a large number of resistors increases the processing cost of the AFSS and also reduces reliability

Method used

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  • Three-dimensional broadband absorption-type frequency selection structure based on ferrite wave-absorbing material
  • Three-dimensional broadband absorption-type frequency selection structure based on ferrite wave-absorbing material
  • Three-dimensional broadband absorption-type frequency selection structure based on ferrite wave-absorbing material

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Embodiment Construction

[0031] The present invention is further analyzed below in conjunction with specific examples.

[0032] The three-dimensional broadband absorbing frequency selective structure based on the ferrite absorbing material of the present invention is a periodic structure, and each structural unit includes a wave-transmitting channel and a wave-absorbing channel;

[0033] The absorbing channel is composed of the first metal surface 1, the second metal surface 4, the first dielectric substrate 2, the metal meandering line 3, the back metal reflective surface, the ferrite absorbing surface 6 and the air cavity, and the front end is open. box body.

[0034] The second metal surface 4 is located below the first metal surface 1 and aligned up and down with the first metal surface 1;

[0035] The back metal reflective surface is located on the back of the first metal surface 1 and the second metal surface 4, and is used to connect the above two metal surfaces and is perpendicular to the abo...

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Abstract

The invention relates to a three-dimensional broadband absorption-type frequency selection structure based on a ferrite wave-absorbing material. According to the invention, a periodic distribution structure is adopted, a structural unit adopts a structure mode of combining a band-pass channel with a wave-absorbing channel, and a wide pass band can be realized and two wave-absorbing bands can be realized at two sides of the pass band in combination with a metal bending line and a specific wave-absorbing material. An upper-layer parallel plate waveguide of the structural unit is composed of a metal bending line, an air cavity and the ferrite wave-absorbing material. A lower-layer parallel plate waveguide is composed of a metallized via hole and a dielectric substrate. According to the invention, a low-insertion-loss passband and two wide wave-absorbing bands can be realized, and good stability is achieved for obliquely incident electromagnetic waves. The structure not only can be appliedto the reduction of a single-station radar cross section (RCS), but also can be applied to the reduction of RCSs of double stations and even multiple stations.

Description

technical field [0001] The invention belongs to the field of microwave technology, and relates to a three-dimensional broadband absorbing frequency selection structure based on ferrite absorbing materials, which can be used as a stealth radome for antennas, and its potential application scene can be applied to a radar radome for an aircraft nose. Background technique [0002] In contemporary military confrontation, the reduction of the Radar Cross Section (RCS) of the antenna is of great significance to the improvement of the stealth performance of the entire combat platform. Among various antenna radar RCS reduction methods, stealth radome based on frequency selective surface / structure (FSS) has been widely used. This type of radome allows electromagnetic waves in the passband to pass through, while reflecting out-of-band electromagnetic waves to other directions, thereby reducing RCS. However, this method is only effective for the reduction of the single-station RCS, but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00H01Q1/28H01Q1/42
CPCH01Q1/28H01Q1/42H01Q17/004H01Q17/008
Inventor 俞钰峰罗国清童剑俞伟良黄郅祺
Owner HANGZHOU DIANZI UNIV
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