Frequency-reconfigurable full-angle perfect matching wave-absorbing darkroom

An all-angle and frequency technology, applied in the field of microwave absorbing medium and anechoic chamber, it can solve the problem of poor absorbing efficiency at large angles, and achieve the effect of expanding the scope of use, expanding the scope of use, and improving the test accuracy.

Active Publication Date: 2022-03-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention has important significance for improving the shortcomings of traditional darkroom absorbing materials such as poor large-angle absorbing efficiency and artificial absorbing medium needing gain factor and narrow-band work

Method used

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  • Frequency-reconfigurable full-angle perfect matching wave-absorbing darkroom

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0041] Such as figure 1 As shown, the specifically implemented anechoic chamber includes a microwave-absorbing medium 1, an upper metal cover 3 and a lower metal cover 4; the upper metal cover 3 and the lower metal cover 4 are respectively arranged on the axis The upper metal cover plate 3 and the lower metal cover plate 4 cover the two ends of the absorbing medium 1, so that a relatively closed darkroom is formed inside the absorbing medium 1;

[0042]The absorbing medium 1 includes multiple concentric and closed-loop absorbing medium layers, the center of the absorbing medium layer coincides with the central axis of the absorbing medium 1, and each absorbing medium layer is mainly composed of absorbing medium units 5 O...

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Abstract

The invention discloses a full-angle perfect matching wave-absorbing darkroom with reconfigurable frequency. Comprising a wave-absorbing medium unit, a wave-absorbing medium layer prepared by the wave-absorbing medium unit, a wave-absorbing medium prepared by using the wave-absorbing medium layer, and a frequency-reconfigurable full-angle perfect matching wave-absorbing darkroom prepared by using the wave-absorbing medium. In the design, the wave-absorbing medium layers of which the relative dielectric constants are certain specific values are sequentially overlaid in the wave propagation direction to realize the wave-absorbing medium conforming to spatial K-K distribution; two Lorentz resonances are constructed in a relative dielectric constant section of a wave-absorbing medium, the position where the real part of the relative dielectric constant is 1 is cut off to achieve matching of a K-K medium and air, and a lumped element is added into a wave-absorbing medium unit to achieve the frequency reconfigurable characteristic of the wave-absorbing medium. All the layers of wave absorbing media are sequentially stacked in the radial direction to achieve the frequency-reconfigurable full-angle perfect matching wave absorbing darkroom. The full-angle perfectly matched wave-absorbing darkroom with the reconfigurable frequency prepared by the invention can realize full-angle non-reflection absorption of wide-band TE waves.

Description

technical field [0001] The invention relates to a microwave-absorbing medium and a microwave-absorbing chamber structure in the field of microwave-absorbing media and an anechoic chamber, in particular to a frequency-reconfigurable microwave-absorbing medium whose relative permittivity conforms to the spatial Krammers-Kronig distribution and a microwave anechoic chamber prepared therefrom. Background technique [0002] Traditional anechoic chambers use pyramids, wedges, and ferrite absorbing materials. The goal of design optimization is only for vertically incident electromagnetic waves, and the wave absorption performance at different angles is different. When the incident angle of electromagnetic waves is large, the absorbing efficiency will decrease rapidly. , so it has a strong angular dispersion characteristic, resulting in a decrease in the measurement accuracy of the darkroom. At the same time, the absorbing materials such as pyramids and wedges used in traditional an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/18
CPCG01R1/18
Inventor 李全平叶德信
Owner ZHEJIANG UNIV
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