CN216930703U - Multilayer high-shielding waveguide window structure - Google Patents
Multilayer high-shielding waveguide window structure Download PDFInfo
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- CN216930703U CN216930703U CN202220411904.3U CN202220411904U CN216930703U CN 216930703 U CN216930703 U CN 216930703U CN 202220411904 U CN202220411904 U CN 202220411904U CN 216930703 U CN216930703 U CN 216930703U
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Abstract
The utility model discloses a multilayer high-shielding waveguide window structure, which comprises a plurality of layers of waveguide windows and a waveguide window frame; the plurality of layers of waveguide windows are fixed in the waveguide window frame by welding; each layer of waveguide window is composed of a plurality of hexagonal waveguide cavities, and two adjacent layers of waveguide windows are arranged in a staggered mode; the hexagonal waveguide cavity consists of six metal side walls; and a metal short-circuit element is loaded in the hexagonal waveguide cavity. The utility model has compact structure, can be flexibly customized according to the requirement of shielding effectiveness, has ultrahigh electromagnetic shielding property while ensuring ventilation rate, miniaturization and heat dissipation, and can be applied to ventilation shielding windows of radar communication, military equipment and the like.
Description
Technical Field
The utility model relates to an electromagnetic shielding technology, belongs to the field of electromagnetic compatibility, and particularly relates to a multilayer high-shielding waveguide window structure which can be applied to chassis ventilation windows of radar communication, military equipment and the like.
Background
With the development of power electronic technology, the problem of electromagnetic radiation is more prominent. At present, in order to avoid external electromagnetic interference, electronic equipment is additionally provided with a shielding window, and the shielding window not only needs to meet the requirements of ventilation and heat dissipation, but also needs to meet the requirement of shielding the interference of external electromagnetic waves on equipment in a chassis. The closed case with seamless surface can achieve ideal shielding effect, but cannot achieve ventilation and heat dissipation effects. The surface of the traditional case adopts a honeycomb grid or a positive direction wire mesh to achieve ventilation and heat dissipation effects, and an electromagnetic field enters the interior through holes to reduce shielding effectiveness. The tubular cavity structure made of metal has high-pass filtering characteristics, can guide electromagnetic waves to propagate along a certain direction, and can achieve a high shielding effect when the electromagnetic waves cannot be transmitted in a frequency band below the cutoff frequency of the waveguide. By utilizing the inherent characteristics of the waveguide, the ventilation and heat dissipation waveguide window based on the waveguide can be designed to realize the electromagnetic shielding effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a multilayer high-shielding waveguide window structure, and the waveguide window structure formed by multilayer staggered arrangement of hexagonal waveguide windows greatly improves the electromagnetic shielding efficiency without influencing the ventilation effect.
In order to achieve the purpose of the utility model, a multilayer high-shielding waveguide window structure is provided, which comprises a plurality of layers of waveguide windows and a waveguide window frame;
the waveguide windows are fixed in the waveguide window frame by welding;
each layer of waveguide window is composed of a plurality of hexagonal waveguide cavities, and two adjacent layers of waveguide windows are arranged in a staggered mode;
the hexagonal waveguide cavity consists of six metal side walls;
and a metal short-circuit element is loaded in the hexagonal waveguide cavity.
Preferably, the metal short-circuit element is a metal sheet.
Preferably, the hexagonal waveguide cavity is loaded with a single metal sheet, which is located in the hexagonal waveguide cavity and connects two parallel sides of the hexagonal waveguide cavity.
Preferably, a plurality of metal sheets are loaded in the hexagonal waveguide cavity, the metal sheets are the same in size and are arranged at equal intervals along the axis of the hexagonal waveguide cavity, and two ends of each metal sheet are connected with two parallel side faces of the hexagonal waveguide cavity.
Preferably, the hexagonal waveguide cavity is loaded with a plurality of metal sheets, and the plurality of metal sheets are arranged in a crossed manner around the axis of the hexagonal waveguide cavity; each metal sheet is connected with two parallel side faces of the hexagonal waveguide cavity.
Preferably, the metal shorting member is a metal pin.
Preferably, the hexagonal waveguide cavity is loaded with a single metal pin, which is located in a central position within the waveguide cavity.
Preferably, the hexagonal waveguide cavity is loaded with a plurality of metal pins, and the plurality of metal pins are arranged at equal intervals along the axis of the hexagonal waveguide cavity.
Preferably, a plurality of metal pins are loaded in the hexagonal waveguide cavity; a plurality of metal pins are arranged around the axis of the hexagonal waveguide cavity in a crossed mode; each metal pin is connected with two parallel side faces of the hexagonal waveguide cavity.
The multilayer high-shielding waveguide window structure has the following advantages:
(1) the waveguide window structure formed by multilayer staggered arrangement of the hexagonal waveguide windows greatly improves the electromagnetic shielding efficiency while the ventilation effect is not influenced;
(2) the metal short-circuit element is loaded in the hexagonal waveguide cavity, so that the heat dissipation effect is improved, and meanwhile, the shielding efficiency is improved;
(3) simple structure, it is customizable.
Drawings
FIG. 1 is a schematic structural diagram of a multi-layer high-shield waveguide window structure;
FIG. 2 is a schematic view of a structure of a plurality of layers of waveguide windows;
FIG. 3 is a schematic diagram of a single hexagonal waveguide cavity;
FIG. 4 is a schematic diagram of the hexagonal waveguide cavity loaded with a single metal sheet in example 1;
FIG. 5 is a schematic view of the hexagonal waveguide cavity loaded with several metal sheets arranged at equal intervals along the axis in example 2;
FIG. 6 is a schematic diagram of a hexagonal waveguide cavity loaded with several metal sheets placed alternately in example 3;
FIG. 7 is a schematic diagram of the hexagonal waveguide cavity loaded with a single metal pin in example 4;
FIG. 8 is a schematic view of the hexagonal waveguide cavity loaded with several metal pins arranged at equal intervals along the axis in example 5;
fig. 9 is a schematic diagram of loading a hexagonal waveguide cavity with several metal pins placed crosswise in example 6.
Detailed description of the preferred embodiments
The utility model is further described below with reference to the following figures and specific examples.
As shown in fig. 1, the multilayer high-shielding waveguide window structure includes several layers of waveguide windows 1 and a waveguide window frame 2, wherein the several layers of waveguide windows 1 are fixed in the waveguide window frame 2 by welding.
As shown in fig. 2, each layer of waveguide window 1 is composed of a plurality of hexagonal waveguide cavities 3, and two adjacent layers of waveguide windows 1 are arranged in a staggered manner.
As shown in fig. 3, the hexagonal waveguide cavity 3 is composed of six metal sidewalls; electromagnetic signals are input from one end of the hexagonal waveguide cavity, attenuated through the hexagonal waveguide cavity 3 and greatly attenuated when reaching the other end and output; the hexagonal waveguide cavity 3 has high-pass filtering characteristics, and the required cut-off frequency can be adjusted according to the side length and the length of the hexagonal waveguide cavity.
The metal short-circuit element is loaded in the hexagonal waveguide cavity 3 and is arranged in the hexagonal waveguide cavity 3, and when electromagnetic wave signals pass through the cavity, the metal short-circuit element plays a role in attenuating the electromagnetic waves and improves the shielding efficiency. In the following embodiments, the metal short-circuit element is a metal sheet or a metal pin, which has high conductivity and attenuates electromagnetic waves in the cavity to improve shielding effectiveness.
Example 1
In this embodiment, the hexagonal waveguide cavity 3 is loaded with a single metal sheet 4, as shown in fig. 4, said metal sheet 4 being located in the hexagonal waveguide cavity 3 and connecting two parallel sides of the hexagonal waveguide cavity 3.
The metal sheet loaded in the hexagonal metal waveguide cavity is a thin metal sheet with strong conductivity and thickness far smaller than the wavelength of the hexagonal waveguide, and the metal sheet is inserted to enable the waveguide structure to generate discontinuous transmission enhanced filtering effect.
Example 2
In this embodiment, as shown in fig. 5, a plurality of metal sheets 4 are loaded in the hexagonal waveguide cavity 3, each metal sheet 4 has the same size and is arranged at equal intervals along the axis of the hexagonal waveguide cavity 3, and two ends of each metal sheet 4 are connected to two parallel side surfaces of the hexagonal waveguide cavity 3.
The metal sheets loaded in the hexagonal metal waveguide cavity are thin metal sheets with strong conductivity and thickness far smaller than the wavelength of the hexagonal waveguide, the loaded metal sheets are connected with two parallel side walls of the waveguide cavity, and each thin metal sheet is arranged at equal intervals along the axis of the waveguide cavity to form an inductive diaphragm, so that the inductance in the waveguide cavity is increased, the attenuation of electromagnetic waves input into the waveguide cavity is realized, and the shielding effect of the waveguide is improved.
Example 3
In the present embodiment, as shown in fig. 6, the hexagonal waveguide cavity 3 is loaded with a plurality of metal sheets 4, and the plurality of metal sheets 4 are arranged crosswise around the axis of the hexagonal waveguide cavity 3; each metal sheet 4 connects two parallel sides of the hexagonal waveguide cavity 3.
The metal sheets loaded in the hexagonal metal waveguide cavity are thin metal sheets with strong conductivity and much smaller thickness than the hexagonal waveguide wavelength, the loaded metal sheets are connected with two parallel side walls of the waveguide cavity, the thin metal sheets are arranged in a crossed mode along the center of the waveguide cavity to form a capacitive diaphragm, when electromagnetic waves enter the waveguide cavity from one end of the waveguide, the electromagnetic waves are attenuated through the capacitive metal diaphragm, and the electromagnetic shielding efficiency of the waveguide window is remarkably improved.
Example 4
In the present embodiment, as shown in fig. 7, the hexagonal waveguide cavity 3 is loaded with a single metal pin 5; a metal pin 5 is inserted into the hexagonal waveguide cavity 3, and the metal pin 5 is located at the center position in the hexagonal waveguide cavity 3.
The metal pin loaded in the hexagonal metal waveguide cavity is a metal column with strong conductivity and the radius far smaller than the waveguide wavelength, the inserted metal pin is positioned in the center of the waveguide cavity, when electromagnetic waves enter the waveguide cavity for transmission, induced current can be generated on the surface of the pin, attenuation on the electromagnetic waves in the waveguide cavity is exerted, and then shielding efficiency is improved.
Example 5
In the present embodiment, as shown in fig. 8, the hexagonal waveguide cavity 3 is loaded with a plurality of metal pins 5, and a plurality of the metal pins 5 are arranged at equal intervals along the axis of the hexagonal waveguide cavity 3.
The metal pins loaded in the hexagonal metal waveguide cavity are metal columns with strong conductivity and the radius far smaller than the waveguide wavelength, and the loaded metal pins are arranged at equal intervals along the axis of the waveguide cavity to form inductive pins so as to attenuate electromagnetic waves in the waveguide cavity, thereby improving the shielding efficiency of the waveguide window.
Example 6
In the present embodiment, as shown in fig. 9, a plurality of metal pins 5 are loaded in the hexagonal waveguide cavity 3; a plurality of metal pins 5 are arranged around the axis of the hexagonal waveguide cavity 3 in a crossed manner; each metal pin 5 connects two parallel sides of the hexagonal waveguide cavity 3. The metal pin 5 has strong conductivity, and the shielding effectiveness of the waveguide structure is greatly improved by inserting the metal pin into the cavity.
The metal pins loaded in the hexagonal metal waveguide cavity are metal columns which are high in conductivity and much smaller in radius than the waveguide wavelength, the loaded metal pins are arranged in a crossed mode along the axis of the waveguide cavity to form capacitive pins, equivalently, capacitive elements are loaded in the waveguide cavity to attenuate electromagnetic energy in the waveguide cavity, and therefore the shielding efficiency of the waveguide structure is improved.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. The multilayer high-shielding waveguide window structure is characterized by comprising a plurality of layers of waveguide windows and a waveguide window frame;
the waveguide windows are fixed in the waveguide window frame by welding;
each layer of waveguide window is composed of a plurality of hexagonal waveguide cavities, and two adjacent layers of waveguide windows are arranged in a staggered mode;
the hexagonal waveguide cavity consists of six metal side walls;
and a metal short-circuit element is loaded in the hexagonal waveguide cavity.
2. The multilayer high-shield waveguide window structure of claim 1 wherein said metal shorting member is a metal sheet.
3. The multilayer high-shielding waveguide window structure of claim 2, wherein the hexagonal waveguide cavity is loaded with a single metal sheet, the metal sheet is located in the hexagonal waveguide cavity and connects two parallel sides of the hexagonal waveguide cavity.
4. The multilayer high-shielding waveguide window structure as claimed in claim 2, wherein a plurality of metal sheets are loaded in the hexagonal waveguide cavity, each metal sheet has the same size and is arranged at equal intervals along the axis of the hexagonal waveguide cavity, and two ends of each metal sheet are connected with two parallel side faces of the hexagonal waveguide cavity.
5. The multilayer high-shielding waveguide window structure of claim 2, wherein the hexagonal waveguide cavity is loaded with a plurality of metal sheets, the plurality of metal sheets being arranged crosswise around an axis of the hexagonal waveguide cavity; each metal sheet is connected with two parallel side faces of the hexagonal waveguide cavity.
6. The multilayer high-shield waveguide window structure of claim 1 wherein said metal shorting elements are metal pins.
7. The multilayer high-shield waveguide window structure of claim 6, wherein said hexagonal waveguide cavity is loaded with a single metal pin, said metal pin being centrally located within the waveguide cavity.
8. The multilayer high-shielding waveguide window structure of claim 7, wherein the hexagonal waveguide cavity is loaded with a plurality of metal pins, and a plurality of the metal pins are arranged at equal intervals along the axis of the hexagonal waveguide cavity.
9. The multilayer high-shielding waveguide window structure of claim 7, wherein a plurality of metal pins are loaded in the hexagonal waveguide cavity; a plurality of metal pins are arranged around the axis of the hexagonal waveguide cavity in a crossed mode; each metal pin is connected with two parallel side faces of the hexagonal waveguide cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220411904.3U CN216930703U (en) | 2022-02-28 | 2022-02-28 | Multilayer high-shielding waveguide window structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220411904.3U CN216930703U (en) | 2022-02-28 | 2022-02-28 | Multilayer high-shielding waveguide window structure |
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| Publication Number | Publication Date |
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| CN216930703U true CN216930703U (en) | 2022-07-08 |
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| CN202220411904.3U Active CN216930703U (en) | 2022-02-28 | 2022-02-28 | Multilayer high-shielding waveguide window structure |
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- 2022-02-28 CN CN202220411904.3U patent/CN216930703U/en active Active
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