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Method for reflection of electromagnetic waves

An electromagnetic wave, reflective surface technology, applied in the field of plasma, to achieve the effect of convenience and flexibility, saving a lot of needs and waste

Inactive Publication Date: 2010-05-26
NAT SPACE SCI CENT CAS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The use of plasma to reflect electromagnetic waves has not been reported before

Method used

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  • Method for reflection of electromagnetic waves
  • Method for reflection of electromagnetic waves
  • Method for reflection of electromagnetic waves

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Embodiment Construction

[0009] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0010] In order to achieve the purpose of reflecting electromagnetic waves with a plasma sheet, the present invention proposes an electromagnetic wave reflection device. The cathode 2 and the anode 1 of the electron beam source are placed at the two ends of the vacuum chamber 3 respectively, and the cathode 2 for generating the plasma adopts a wire Under suitable air pressure and working gas conditions, a certain high voltage is applied to the electrode to generate a linear electron beam, and the high voltage causes the gas discharge between the cathode and the anode surface to be excited, In addition, a magnetic field generating device 4 is added to the vacuum chamber to generate an axial magnetic field, and the axial magnetic field makes the electrons gyratory to generate secondary ionization to form a plasma sheet, that is, a flat-shaped plas...

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Abstract

The invention relates to a method for the reflection of electromagnetic waves, which is characterized in that: instead of using a conventional solid metal surface as a reflecting electromagnetic wave surface, the method uses a plasma technique to generate a plasma sheet serving as a reflecting surface of the electromagnetic waves to realize the reflection of the electromagnetic waves. The plasma density is adjusted by adjusting the voltage of an external excitation power supply to meet the reflection requirements on the electromagnetic waves with different frequencies; the shape of the plasma sheet is adjusted by an externally provided axial magnetic field to form curved-surface or planar plasma sheet; and by utilizing a method for using a non-solid form plasma surface as the reflecting surface, the shape of the reflecting surface can be flexibly changed and the electromagnetic waves with different frequencies can be selectively reflected.

Description

technical field [0001] The present invention relates to the plasma field and the radio field, in particular to an electromagnetic wave reflection method. Background technique [0002] In the past, the traditional electromagnetic wave reflection materials were all metal bodies. The electromagnetic wave reflection device made of metal materials is characterized in that once the product is made, the reflection characteristics cannot be changed. Both the reflection frequency and the transmission frequency are fixed, so when the reflection frequency range needs to be changed, the metal reflector must be replaced accordingly. The use of plasma to reflect electromagnetic waves has not been reported before. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide an electromagnetic wave reflection method in order to overcome the traditional defect that only a solid-shaped metal body can be used as an electromagnetic wave reflection surface, and once th...

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Application Information

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IPC IPC(8): H01Q15/14H01Q19/10
Inventor 徐跃民侯印鸣程芝峰端木刚孙海龙丁亮吴逢时鉴福升朱翔孙简
Owner NAT SPACE SCI CENT CAS