Wave absorbing device with adjustable frequency

A technology of frequency and metamaterials, applied in the field of frequency-adjustable absorbing devices, to achieve the effect of wide absorbing frequency band and high absorbing efficiency

Active Publication Date: 2012-10-24
KUANG CHI INST OF ADVANCED TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no absorbing material that can better meet the conditions of absorption frequency bandwidth and high absorption rate.

Method used

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  • Wave absorbing device with adjustable frequency
  • Wave absorbing device with adjustable frequency
  • Wave absorbing device with adjustable frequency

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Embodiment Construction

[0025] Absorbing material refers to the material that can absorb the electromagnetic wave energy incident on its surface, and convert the electromagnetic wave energy into heat energy or other forms of energy through the dielectric loss of the material. The basic design idea of ​​the absorbing material is: when the electromagnetic wave is incident on the absorbing material, it can enter the material as much as possible without reflecting as much as possible, that is, the absorbing material is required to meet the impedance matching characteristics; the electromagnetic wave entering the material can be affected by the medium Loss and rapidly attenuated, that is, the absorbing material is required to meet the attenuation matching characteristics. It is the goal pursued by various absorbing materials to satisfy both the impedance matching characteristic and the attenuation characteristic as large as possible.

[0026] At present, there are many absorbing materials researched and a...

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Abstract

The embodiment of the invention relates to a wave absorbing device with an adjustable frequency. The wave absorbing device with an adjustable frequency comprises a reactance adjustable varactor with a wave absorbing metamaterial, and a master control unit for adjusting the varactor, wherein the varactor is arranged on each metamaterial unit. The wave absorbing device provided by the invention can control the varactor arranged on each metamaterial unit through the master control unit to further adjust the equivalent electromagnetic parameters of each metamaterial unit, so that the wave absorbing material meets the impedance matching characteristics and attenuation matching characteristics for incident electromagnetic waves with different frequencies. And the wave absorbing device has a wider wave absorbing frequency band and a higher wave absorbing efficiency.

Description

technical field [0001] The invention relates to the field of wave-absorbing devices, in particular to a frequency-adjustable wave-absorbing device. Background technique [0002] With the development of modern science and technology, the impact of electromagnetic radiation on the environment is increasing. At the airport, flights are delayed due to electromagnetic wave interference; in hospitals, mobile phones often interfere with the normal work of various electronic medical instruments. Therefore, controlling electromagnetic pollution and finding a material that can resist and weaken electromagnetic radiation—wave-absorbing materials have become a major topic in material science. [0003] At present, there are many absorbing materials researched and applied, including ferrite absorbing materials, metal micropowder absorbing materials, nano absorbing materials, polycrystalline iron fiber absorbing materials, conductive high polymer absorbing materials, and plasma absorbing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00
CPCH05K9/0071
Inventor 刘若鹏季春霖栾琳方能辉
Owner KUANG CHI INST OF ADVANCED TECH
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