110 GHz ultrahigh frequency cut-off waveguide ventilating window

Abstract

The invention relates to the technical field of cut-off waveguide ventilation windows, in particular to a 110 GHz ultrahigh frequency cut-off waveguide ventilation window. The ultrahigh frequency cut-off waveguide ventilation window comprises a box cover, a box body, an annular wave-absorbing material and a flat wave-absorbing material, the box cover is arranged on the box body, and the annular wave-absorbing material and the flat wave-absorbing material are horizontally arranged in the box body in parallel. According to the 110 GHz ultrahigh frequency cut-off waveguide ventilating window, through optimization of the structural design and combination of the reasonable layout of the annular wave-absorbing material and the flat plate wave-absorbing material, a turning air channel is formed, linear propagation of electromagnetic waves is effectively restrained, and meanwhile high-frequency electromagnetic waves are efficiently absorbed through the high-performance wave-absorbing material. Compared with the limitation that a traditional cut-off waveguide ventilation window is only suitable for the frequency band below 40 GHz, the electromagnetic shielding performance is remarkably improved, effective cut-off of high-frequency electromagnetic waves below 110 GHz can be achieved, and therefore the test frequency range of a microwave anechoic chamber is greatly expanded.

Description

Technical Field

[0001] The present invention relates to the technical field of cutoff waveguide ventilation windows, and more particularly to a 110GHz ultra-high frequency cutoff waveguide ventilation window. Background Art

[0002] A microwave anechoic chamber is a specialized testing environment constructed from absorbing materials and metal shielding, simulating interference-free "free space" conditions. It is widely used in testing antennas, radars, and wireless communication products to improve test accuracy and efficiency. Its core structure includes key components such as the shielded shell, absorbing materials, shielded doors, filters, and cutoff waveguide vents. The cutoff waveguide vents, as a critical channel for chamber ventilation and electromagnetic shielding, must ensure air circulation while effectively suppressing electromagnetic leakage to ensure a pure test environment.

[0003] Traditional cutoff waveguide ventilation windows are designed primarily for electromagnetic wave shielding below 40 GHz, providing excellent cutoff performance within this frequency band. However, with the rapid advancement of electronic technology, the test frequency requirements for devices under test (such as millimeter-wave communications and terahertz technology) have expanded to over 100 GHz. Existing ventilation windows clearly lack shielding performance at these high frequencies, potentially leading to electromagnetic leakage and compromising test accuracy. Therefore, optimizing the structural design of cutoff waveguide ventilation windows to address electromagnetic shielding requirements at higher frequencies while maintaining ventilation efficiency has become a key challenge in microwave anechoic chamber technology. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one aspect of the present invention is to provide a 110GHz ultra-high frequency cutoff waveguide ventilation window, wherein the ultra-high frequency cutoff waveguide ventilation window includes a box cover, a box body, an annular absorbing material and a flat-plate absorbing material. The box cover is arranged on the box body, and the annular absorbing material and the flat-plate absorbing material are arranged horizontally and side by side inside the box body.

[0005] Preferably, the box cover and the box body are fixedly connected using M8 bolts.

[0006] Preferably, electromagnetic sealing measures are adopted for the box cover and the box body, and the box cover and the box body are made of fully welded steel plates with anti-rust treatment on the surface.

[0007] Preferably, the annular absorbing material is adhered to the inner wall of the box by using an adhesive, and the adhesive is specifically a chloroprene-phenolic adhesive.

[0008] Preferably, the annular absorbing material is a polyurethane absorbing material.

[0009] Preferably, the flat plate absorbing material comprises a flat plate absorbing material box and a flat plate absorbing material, and the flat plate absorbing material fills the flat plate absorbing material box.

[0010] Preferably, the flat plate absorbing material box is specifically a Q235 steel plate; and the flat plate absorbing material is specifically a polyurethane absorbing material.

[0011] Preferably, the flat plate absorbing material further includes flat plate absorbing material box mounting ears, and there are four flat plate absorbing material box mounting ears. The flat plate absorbing material is connected to the inner wall of the box through the four flat plate absorbing material box mounting ears, and the flat plate absorbing material box mounting ears are specifically Q235 steel plates.

[0012] Preferably, the cross-sectional area of the flat plate absorbing material is larger than the hollow area of the annular absorbing material.

[0013] Preferably, the high-frequency cutoff waveguide ventilation window box is connected to the cutoff waveguide ventilation window with bolts, the contact surface is filled with electromagnetic sealing material, and the honeycomb aperture of the cutoff waveguide ventilation window is 3.2 mm.

[0014] The beneficial effects of the present invention are as follows: The 110GHz ultra-high frequency cutoff waveguide ventilator provided by this invention utilizes an optimized structural design and the rational layout of annular and flat absorbing materials to form a redirected air duct, effectively suppressing the linear propagation of electromagnetic waves while utilizing high-performance absorbing materials to efficiently absorb high-frequency electromagnetic waves. Compared to the limitations of traditional cutoff waveguide ventilators, which are limited to frequencies below 40GHz, this invention significantly improves electromagnetic shielding performance, effectively blocking high-frequency electromagnetic waves below 110GHz, thereby significantly expanding the test frequency range of microwave anechoic chambers.

[0015] Furthermore, this design enhances high-frequency electromagnetic wave cutoff while maintaining excellent ventilation performance, ensuring unimpeded air flow within the chamber. This innovation not only meets the high-frequency testing requirements of modern wireless communications, millimeter-wave radar, and other applications, but also improves the stability and accuracy of the test environment, possessing significant engineering application value.

[0016] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which: Figure 1 This is a schematic diagram of the 110GHz ultra-high frequency cutoff waveguide ventilation window structure of the present invention; Figure 2This is a top view of the 110 GHz ultra-high frequency cutoff waveguide ventilation window of the present invention; Figure 3 This is a side view of the 110 GHz ultra-high frequency cutoff waveguide ventilation window of the present invention; Figure 4 This is a cross-sectional view of the 110 GHz ultra-high frequency cutoff waveguide ventilation window of the present invention; Figure 5 This is a schematic diagram of the connection of the 110GHz ultra-high frequency cutoff waveguide ventilation window of the present invention when in use; The corresponding relationship between the reference numerals and component names in the figure is as follows: 1 is the box cover, 2 is the box body, 3 is the annular absorbing material, 4 is the flat absorbing material, 41 is the flat absorbing material box, 42 is the flat absorbing material, 43 is the mounting ear of the flat absorbing material box, and 5 is the cutoff waveguide ventilation window. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from the description. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0020] The ultra-high frequency cutoff waveguide ventilation window of the present invention comprises a box cover 1, a box body 2, an annular absorbing material 3, a flat absorbing material 4, a flat absorbing material box 41, a flat absorbing material 42 and four flat absorbing material box mounting ears 43.

[0021] like Figures 1 to 4 As shown, the box cover 1 is mounted on the box body 2, and the annular absorbing material 3 and the flat absorbing material 4 are positioned horizontally and side by side inside the box body 2. The flat absorbing material 4 is connected to the inner wall of the box body 2 via four flat absorbing material box mounting lugs 43. The cross-sectional area of the flat absorbing material 4 is larger than the hollow area of the annular absorbing material 3.

[0022] The box cover 1 and the box body 2 are fixedly connected with M8 bolts, and electromagnetic sealing measures are taken for the box cover 1 and the box body 2. The box cover 1 and the box body 2 are made of fully welded steel plates and the surface is rust-proofed.

[0023] The annular absorbing material 3 is adhered to the inner wall of the box 2 with an adhesive, which is specifically a chloroprene-phenolic adhesive. The annular absorbing material 3 is specifically a polyurethane absorbing material. The flat absorbing material 42 fills the flat absorbing material box 41, which is specifically a Q235 steel plate. The flat absorbing material 42 is specifically a polyurethane absorbing material, and the flat absorbing material box mounting lug 43 is specifically a Q235 steel plate.

[0024] like Figure 5 As shown, when in use, the high-frequency cutoff waveguide ventilation window box 2 of the present invention is connected to the cutoff waveguide ventilation window 5 with bolts, and the contact surface is filled with electromagnetic sealing material. The honeycomb aperture of the cutoff waveguide ventilation window 5 is 3.2 mm.

[0025] Example First, fix the bottom edge of the box 2 to the 3.2mm aperture cutoff waveguide ventilation window with M8 bolts, and fill all contact surfaces between the box 2 and the 3.2mm aperture cutoff waveguide ventilation window with electromagnetic sealing material.

[0026] Then embed the flat absorbing material 42 into the flat absorbing material box 41, overlap the flat absorbing material box 41 with the four flat absorbing material box mounting ears 43, fix the four flat absorbing material box mounting ears 43 with screws, and fix the four flat absorbing material box mounting ears 43 to the inner wall of the box 2 with screws.

[0027] Then, the annular absorbing material 3 is fixed to the corresponding position above the flat absorbing material box 41 in the absorbing box by using chloroprene-phenolic adhesive.

[0028] Finally, place the box cover 1 on top of the box body 2. Fix the box cover 1 and the box body 2 with M8 bolts, and fill all contact surfaces between the box body 2 and the box cover 1 with electromagnetic sealing material.

[0029] Testing the high-frequency cutoff waveguide ventilation window of the present invention Refer to the test method in GJB8820-2015 to perform the test Test results Through the structural design of the present invention, the effective cutoff frequency of the cutoff waveguide ventilation window has been successfully increased from the current 40GHz to 110GHz, breaking through the bottleneck of traditional technology and significantly broadening the operating frequency band of electromagnetic shielding. This improvement allows the ventilation window to maintain excellent shielding effectiveness in the millimeter wave band, effectively suppressing high-frequency electromagnetic leakage, and meeting the stringent shielding requirements of high-frequency application scenarios such as 5G communications and terahertz technology. At the same time, the design maintains good ventilation performance while expanding the frequency band, taking into account the dual requirements of equipment heat dissipation and electromagnetic protection, and providing key technical support for the reliable operation of highly integrated electronic equipment in complex electromagnetic environments.

[0030] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A 110GHz ultra-high frequency cutoff waveguide ventilation window, characterized by: The ultra-high frequency cut-off waveguide ventilation window comprises a box cover (1), a box body (2), an annular absorbing material (3) and a flat absorbing material (4); the box cover (1) is arranged on the box body (2); and the annular absorbing material (3) and the flat absorbing material (4) are arranged horizontally and in parallel inside the box body (2).

2. The 110 GHz ultra-high frequency cutoff waveguide ventilation window according to claim 1, characterized in that: The box cover (1) and the box body (2) are fixedly connected using M8 bolts.

3. The 110 GHz ultra-high frequency cutoff waveguide ventilation window according to claim 2, characterized in that: The box cover (1) and the box body (2) adopt electromagnetic sealing measures. The box cover (1) and the box body (2) are made of fully welded steel plates, and the surface is treated to prevent rust.

4. The 110 GHz ultra-high frequency cutoff waveguide ventilation window according to claim 1, characterized in that: The annular wave absorbing material (3) is adhered to the inner wall of the box (2) using an adhesive, and the adhesive is specifically a chloroprene-phenolic adhesive.

5. The 110 GHz ultra-high frequency cutoff waveguide ventilation window according to claim 1, characterized in that: The annular absorbing material (3) is specifically a polyurethane foam absorbing material.

6. The 110 GHz ultra-high frequency cutoff waveguide ventilation window according to claim 1, characterized in that: The flat plate absorbing material (4) comprises a flat plate absorbing material box (41) and a flat plate absorbing material (42), and the flat plate absorbing material (42) fills the flat plate absorbing material box (41).

7. The 110 GHz ultra-high frequency cutoff waveguide ventilation window according to claim 6, characterized in that: The flat plate absorbing material box (41) is specifically a Q235 steel plate; the flat plate absorbing material (42) is specifically a polyurethane foam absorbing material.

8. The 110 GHz ultra-high frequency cutoff waveguide ventilation window according to claim 6, characterized in that: The flat plate absorbing material (4) further comprises a flat plate absorbing material box mounting lug (43), wherein the flat plate absorbing material box mounting lug (43) is four, and the flat plate absorbing material (4) is connected to the inner wall of the box body (2) via the four flat plate absorbing material box mounting lugs (43), wherein the flat plate absorbing material box mounting lugs (43) are specifically Q235 steel plates.

9. The 110 GHz ultra-high frequency cutoff waveguide ventilation window according to claim 1, characterized in that: The cross-sectional area of the flat plate absorbing material (4) is larger than the hollow area of the annular absorbing material (3).

10. The 110 GHz ultra-high frequency cutoff waveguide ventilation window according to claim 1, characterized in that: The high-frequency cutoff waveguide ventilation window box (2) is connected to the cutoff waveguide ventilation window (5) by bolts, and the contact surface is filled with electromagnetic sealing material. The honeycomb aperture of the cutoff waveguide ventilation window (5) is 3.2 mm.

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