KR20150096846A - Stealth methods using microwave absorbing structure - Google Patents

Abstract

The present invention relates to a microwave absorbing structure having an excellent microwave absorbing ratio for a stealth function without changing the shape of an object to allow aircrafts, vessels and missiles for military purpose to have the stealth function capable of avoiding radar by attaching only a microwave absorbing structure to the object. The principle of microwave absorption of the microwave absorbing structure is to absorb microwaves by attaching an aluminum pillar with square, hexagonal, or polygonal holes having a surface length that is shorter than a half of the wavelength of the microwave using the undulating property of the microwaves at the side as if they were a network to prevent vibration of the microwaves when passing through the holes, wherein the height of the pillar shall be longer than a half of the wavelength; however, it may be shorter than the wavelength through performance experiments and when the material of the structure to absorb the microwaves is a metal which reflects the microwave well and aluminum is appropriate. According to the present invention, the method has a superior microwave absorbing ratio than conventional microwave absorbing paints so a stealth function with an excellent performance can be provided to existing aircrafts, vessels and missiles, etc. at lower costs by attaching a microwave absorbing structure to reduce the reflecting area of radar waves without changing the shape, thereby utilizing the technology in shielding microwaves and electronic waves to greatly contribute to the augmentation of national defense.

Description

Stealth methods using microwave absorbing structure [

The present invention relates to a stealth method using a structure having excellent radio wave absorption rate so that various types of weapons such as military aircraft, traps, and missiles can not be identified by radar.

The radar emits high-frequency radio waves with strong directivity, and detects radio waves reflected from the object to detect the object.

The radio waves propagate in the form of waves.

A representative material that reflects radio waves is aluminum.

The stealth method known so far is to form the shape to minimize the reflection area of the radar wave and to paint the outside of the object to absorb the radio wave.

Among them, the most effective method so far is to form the shape to minimize the reflection area, to restrict the form that can be made, and to limit the load of the fighter such as the limitation of the load in the case of a fighter, It is not good because it is not used alone and it is used together with the former method.

In addition, both of these technologies are expensive to develop and time consuming.

Therefore, the present invention enables a stealth function by attaching a radio wave absorbing structure to an object surface without changing the shape of an object by using a radio wave absorbing structure having a low manufacturing cost and an excellent wave absorption rate.

According to an aspect of the present invention, there is provided a radio wave absorbing structure having an excellent radio wave absorption rate. The radio wave absorbing structure has a rectangular shape with a length of one side being less than a half wavelength of a radar wave, It is a lattice type in which aluminum columns are attached continuously to the side, and the column height should be longer than 1/2 wavelength, but the actual performance test can be made shorter by considering the desired performance.

The principle of the radio wave absorbing structure is to spread the pillar of the hole smaller than the wavelength of the radio wave so that the radio waves do not vibrate in the middle of the space where the radio wave propagates, The radio waves pass through the holes of this structure and are vibrated by the aluminum plate and disappear.

At this time, the material of the structure can be a metal that can reflect the radio wave well, and aluminum is most economical.

When the radio wave absorbing structure is attached to the surface of the object to absorb the radar wave, the object has a stealth function.

Since the electromagnetic wave absorbing structure has a simple principle and is easy to manufacture, it has a high possibility of technology leakage. In the case of an airplane, it is necessary to smooth the surface, so that the electromagnetic wave absorbing structure is painted with a paint penetrating the surface of the electromagnetic wave absorbing structure. .

Stealth can be implemented at a much lower cost than conventional stealth technology, and it will have a stealth function if only the radio wave absorbing structure is attached to the surface of existing aircraft, traps and missiles.

Especially, since stealth missile development can not identify and intercept any existing defense system, it can have a strategic weapon capable of hitting enemies from a distance.

It can be used as radio wave and electromagnetic wave shielding network in various fields by applying the radio wave absorbing structure.

1 is a perspective view of a radio wave absorbing structure in the form of a square;
2 is a plan view of a square wave absorption structure
3 is a plan view of a radio wave absorbing structure in the form of a regular hexagon.

The ideal way to stealth technology is to absorb radar waves.

Radar waves have the property of wave due to propagation.

As an example of a method of absorbing wave energy using the characteristics of a wave, light is a wave property, and when two polarizing films are staggered and staggered, the light is absorbed without passing through the polarizing film. It is because of the wave nature of light.

When the wave is applied to the radio wave shielding, a structure having a net-like structure in which aluminum having excellent radio wave reflectance is arranged in a lattice-like manner as shown in Fig.

The size and height of the lattice can be adjusted to the optimum size through the performance test considering the frequency of the radar wave to be avoided.

The shape of the lattice may be a square shape as shown in FIG. 2 or a hexagonal or other polygonal shape as shown in FIG. 3, and the thickness of the metal should be made thinner and the edges rounded to minimize the reflection area.

As a method of simply testing the performance of the radio wave absorbing structure, the aluminum insect screen marketed as a substitute for the structure is used as a structure substitute, and when the mobile phone is surrounded, the mobile phone is blocked and the mobile phone is displayed as an outgoing call. It is possible to shield radio waves in space. The blocking of the radio waves in the visible screen ensures that this structure effectively absorbs radio waves.

It can be used to stealth a wide range of military weapons such as aircraft, traps, and missiles in the military field. It can also be used to block enemy radio waves and protect electronic devices against powerful electromagnetic attacks.

10: Metal with high reflectivity
11: Square wave type radio wave absorbing structure
12: Hexagonal wave absorbing structure

Claims (2)

In the radio wave absorbing structure method,
The radio wave absorbing structure uses a wave characteristic of a radio wave to make a polygonal hole having a metal that reflects a radio wave well, such as aluminum, having a wave length smaller than the wave length, as a columnar structure, Is passed through the holes of the sphere and absorbs wave energy while passing through the column. The method according to claim 1,
To improve the radio wave absorption performance and to shorten the height of the column, a radio wave absorbing structure having a short column height is formed by making multiple radio wave absorbing structures.

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