CN219256667U

CN219256667U - Electromagnetic shielding window with stealth function

Info

Publication number: CN219256667U
Application number: CN202221849322.XU
Authority: CN
Inventors: 黎亚萍
Original assignee: Qinhuangdao Bodun Electronics Co ltd
Current assignee: Qinhuangdao Bodun Electronics Co ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2023-06-27
Anticipated expiration: 2032-07-18

Abstract

The utility model relates to an electromagnetic shielding window with a stealth function, which comprises a first substrate layer, a second substrate layer and a third substrate layer which are transparent, wherein the first substrate layer to the third substrate layer are sequentially overlapped; a radar wave absorbing layer is arranged between the first substrate layer and the second substrate layer; an electromagnetic shielding layer is arranged between the second substrate layer and the third substrate layer. The electromagnetic shielding window with the stealth function has the functions of light transmission, electromagnetic shielding and radar stealth, and can meet the requirements of equipment window parts of military equipment, particularly military vehicles, military command shelter and the like.

Description

Electromagnetic shielding window with stealth function

Technical Field

The utility model relates to the technical field of electromagnetic shielding devices, in particular to an electromagnetic shielding window with a stealth function.

Background

With the widespread use of electronic technology and computer technology in the military field, in such complex electromagnetic environments, various kinds of interference will greatly affect the normal operation of internal electronic and electrical equipment. Electromagnetic compatibility EMC requires that the equipment and system not be disturbed in its complex electromagnetic environment nor that other equipment be operating properly. The technical field of EMC electromagnetic compatibility enables electronic equipment to have compatibility of electromagnetic interference resistance and no interference to surrounding equipment through technical means.

The electronic and electric equipment integrated inside the precision electronic equipment and the military equipment has the electromagnetic compatibility EMC performance of resisting and controlling external interference as the main performance requirement of the equipment under the combined action of the interference of external electronics against equipment and the attack of electromagnetic weapons. All equipment observation windows, light-transmitting windows, human-computer interfaces and computer terminal instrument display windows are required to have electromagnetic compatibility with the whole equipment. And all human-computer interfaces and display windows are required to be light-transmitting and shielding, and electromagnetic shielding window products are key products in shielding material classification in the EMC electromagnetic compatibility industry.

The windows of various military vehicles have radar stealth function requirements on the basis of electromagnetic shielding performance. Therefore, providing equipment widgets, such as military equipment, particularly military vehicles, military command shelter and the like, is a practical requirement for research and development of the current military window.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides an electromagnetic shielding window with a stealth function, which comprises a first substrate layer, a second substrate layer and a third substrate layer which are transparent, wherein the first substrate layer to the third substrate layer are sequentially overlapped; a radar wave absorbing layer is arranged between the first substrate layer and the second substrate layer; an electromagnetic shielding layer is arranged between the second substrate layer and the third substrate layer.

Wherein the substrate layer is a glass layer or an organic glass layer.

The radar wave absorbing layer is a nano metal wave absorbing layer.

The surface of the radar wave-absorbing layer is covered with metal grid protrusions, and the metal grid protrusions are arranged on one surface of the radar wave-absorbing layer, which faces the electromagnetic shielding layer or the first substrate layer.

Wherein, the electromagnetic shielding layer is one of an electromagnetic shielding silk screen layer or a shielding grid layer.

The first substrate layer, the second substrate layer, the third substrate layer, the radar wave absorbing layer and the electromagnetic shielding layer are connected through an adhesive layer.

Wherein, the gluing layer is PVB solid glue film or EVA solid glue film.

The beneficial effects of the utility model are as follows: the electromagnetic shielding window with the stealth function has the functions of light transmission, electromagnetic shielding and radar stealth, and can meet the requirements of equipment window parts of military equipment, particularly military vehicles, military command shelter and the like.

Drawings

The utility model will be described in further detail with reference to the drawings and the detailed description.

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a schematic view of a metal mesh bump of the present utility model.

Description of the reference numerals

1. The electromagnetic shielding device comprises a first substrate layer, a second substrate layer, a third substrate layer, an electromagnetic shielding layer, a radar wave absorbing layer and metal grid protrusions, wherein the first substrate layer, the second substrate layer, the third substrate layer, the electromagnetic shielding layer, the radar wave absorbing layer and the metal grid protrusions are arranged on the substrate layer.

Detailed Description

The technical solutions in the embodiments of the present utility model are clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

As shown in fig. 1 and fig. 2, in the electromagnetic shielding window with the stealth function provided in the embodiment, the frame structure of the shielding window is not shown, and only a transparent plate portion with a corresponding function in the frame is specifically introduced, and the electromagnetic shielding window comprises a first substrate layer 1, a second substrate layer 2 and a third substrate layer 3 which are transparent, wherein the three substrate layers are sequentially arranged from top to bottom;

a radar wave absorbing layer 5 is arranged between the first substrate layer 1 and the second substrate layer 2;

an electromagnetic shielding layer 4 is arranged between the second substrate layer 2 and the third substrate layer 3;

the three substrate layers mainly play a supporting role, the radar wave absorbing layer 5 plays a role in stealth of the radar, and the electromagnetic shielding layer 4 plays a role in shielding electromagnetic signals;

the substrate layer can be a glass layer or an organic glass layer, and the specific size and thickness of the substrate layer can be customized according to the requirement and do not influence the stealth shielding function, wherein the optional thickness is 3-5 mm.

The radar wave-absorbing layer 5 is a nano metal wave-absorbing layer, as shown in fig. 2, and is covered with grid protrusions 51, the radar wave-absorbing layer 5 is prepared by compounding nanoscale powder made of metals such as Fe, co, ni and the like and alloy, medium type nano powder and an adhesive, and a transparent film is prepared by adopting a nano imprinting technology, and can be customized or purchased directly in the prior art;

the thickness of the radar absorbing layer 5 is 60-125 micrometers, the metal grid protrusions 51 are metal or alloy lines, each grid is square and is adjacently arranged on the surface of the radar absorbing layer 5, the unilateral length of each grid is 3-7 micrometers, and the heights of the protrusions are 3-7 micrometers.

The radar absorbing layer 5 and the metal mesh protrusions 5 function as radar absorbing, i.e. radar stealth, and also maintain good light transmittance, and the metal mesh protrusions 51 are provided on the side of the radar absorbing layer 5 facing the electromagnetic shielding layer 4 or the side facing the first substrate layer 1.

The electromagnetic shielding layer 4 is an electromagnetic shielding wire mesh layer (100 mesh) or a shielding mesh layer, and the thickness of the layer is less than 100 micrometers to achieve a light transmittance of more than 70% and a shielding effectiveness of 60 db, and in this embodiment, the electromagnetic shielding layer 4 has a conductive wrapping (not shown in the figure) which forms a conductive path with the conductive wrapping.

Electromagnetic shielding silk screen: the screen mesh is generally woven by alloy materials, and a black shielding screen mesh is prepared by electroplating or electroless plating of metal materials such as nickel and the like on the screen mesh.

Shielding grid: on the PET transparent film, an etching or embossing technology is adopted, and a metal material is used for preparing micro patterns, the patterns are square, and the like, and the micro patterns can be used as light-transmitting shielding base materials.

The above-described choices of electromagnetic shielding layer 4 are all customizable prior art products;

when the electromagnetic shielding layer 4 is a shielding mesh layer or an electromagnetic shielding silk screen layer, all the layers are bonded through an adhesive layer (not shown);

the adhesive layer is PVB solid film or EVA solid film, and the thickness is 1.27 or 1.52 mm.

The manufacturing process of the utility model is that a substrate layer is used as a clamping piece to fix the electromagnetic shielding layer 4 and the radar wave absorbing layer 4, an adhesive layer 4 is arranged between the layers, and the whole melting is carried out by using a pressurizing kettle to prepare an integrated composite product.

It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Claims

1. The electromagnetic shielding window with the stealth function is characterized by comprising a first substrate layer, a second substrate layer and a third substrate layer which are transparent, wherein the first substrate layer to the third substrate layer are sequentially overlapped;

a radar wave-absorbing layer is arranged between the first substrate layer and the second substrate layer, the radar wave-absorbing layer is a nano metal wave-absorbing layer, the thickness of the radar wave-absorbing layer is 60-125 microns, the surface of the radar wave-absorbing layer is covered with metal grid protrusions, each grid of the metal grid protrusions is square, the single-side length of each grid of the metal grid protrusions is 3-7 microns, and the height of each grid of the metal grid protrusions is 3-7 microns;

an electromagnetic shielding layer is arranged between the second substrate layer and the third substrate layer, and the thickness of the electromagnetic shielding layer is smaller than 100 micrometers;

wherein, three substrate layers are glass layers or organic glass layers, and the thickness of the three substrate layers is 3-5 mm.

2. The electromagnetic shielding window with the stealth function according to claim 1, wherein the metal grid protrusions are arranged on one surface of the radar absorbing layer facing the electromagnetic shielding layer or one surface of the radar absorbing layer facing the first substrate layer.

3. An electromagnetic shielding window with stealth function according to claim 2, wherein the electromagnetic shielding layer is one of an electromagnetic shielding wire mesh layer and a shielding mesh layer.

4. The electromagnetic shielding window with the stealth function according to claim 3, wherein the first substrate layer, the second substrate layer, the third substrate layer, the radar absorbing layer and the electromagnetic shielding layer are connected through an adhesive layer.

5. The electromagnetic shielding window with stealth function according to claim 4, wherein the adhesive layer is a PVB solid adhesive layer or an EVA solid adhesive layer.