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Three-dimensional Broadband Absorbing Frequency Selective Structure with Switchable Reflection Band

A frequency-selective, switch-type technology, applied in the microwave field, to achieve the effect of improving stealth characteristics, stabilizing frequency response characteristics, and improving flexibility

Active Publication Date: 2022-02-11
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The few reported active frequency selective structures cannot achieve controllable performance in a wide frequency band

Method used

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  • Three-dimensional Broadband Absorbing Frequency Selective Structure with Switchable Reflection Band
  • Three-dimensional Broadband Absorbing Frequency Selective Structure with Switchable Reflection Band
  • Three-dimensional Broadband Absorbing Frequency Selective Structure with Switchable Reflection Band

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Embodiment Construction

[0026] The present invention is further analyzed below in conjunction with specific examples.

[0027] The invention adopts parallel connection of double resonators, and realizes a three-dimensional broadband absorption frequency selection structure with switchable reflection bands by loading an electrically controllable radio frequency diode on the second resonator. When the reflection band is turned on (that is, the diode is turned on), the structure exhibits reflection characteristics in the central frequency band, and there is a wide absorption band on both sides of the reflection band; when the reflection band is turned off (that is, the diode is turned off), the structure exhibits reflection characteristics A wave absorber with a wide absorbing band.

[0028] Such as figure 1 , 2 As shown, the reflective band switchable three-dimensional broadband absorption frequency selective structure is a periodic structure, and each structural unit consists of first and second los...

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Abstract

The invention relates to a three-dimensional broadband absorption frequency selective structure with a switchable reflection band. The previous frequency selection structures are basically passive structures with a single function, and it is difficult to make different responses to different environments. And the few reported reflective frequency selective structures loaded with electrical control elements often have a narrow working frequency band and limited working conditions. The invention adopts the combination of double resonators, and controls the working state of one of the resonators to realize the opening and closing of the reflection band of the frequency selection structure, thereby realizing the change of the working mode, which greatly improves the frequency selection structure. The flexibility expands its application prospects.

Description

technical field [0001] The invention belongs to the field of microwave technology, and relates to a switchable reflection band three-dimensional broadband absorption frequency selection structure, which can be used as a reflection surface of a reflection surface antenna in a microwave frequency band, and its potential application scenarios include air detection radars of warships, etc. Background technique [0002] In current military applications, using frequency-selective surfaces / 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 screen electromagnetic waves of a specific frequency band, polarization mode, and incident angle, transmit the required electromagnetic waves, and reflect the unnecessary electromagnetic waves. Therefore, the radome developed by using the frequen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/00
CPCH01Q15/0013H01Q15/0026
Inventor 俞伟良罗国清俞钰峰代喜望张晓红
Owner HANGZHOU DIANZI UNIV