WO2021051658A1

WO2021051658A1 - Waveguide interface structure for preventing electromagnetic wave signal leakage

Info

Publication number: WO2021051658A1
Application number: PCT/CN2019/122295
Authority: WO
Inventors: 何仲夏; 刘锦霖; 陈国胜; 梁稳
Original assignee: 盛纬伦(深圳)通信技术有限公司
Priority date: 2019-09-20
Filing date: 2019-12-01
Publication date: 2021-03-25
Also published as: CN110600838A

Abstract

Provided is a structure for preventing electromagnetic wave signal leakage. The structure is provided with a first waveguide leak-proof plate and a second waveguide leak-proof plate; the surfaces of the first waveguide leak-proof plate and second waveguide leak-proof plate are electrically conductive metal surfaces; and the first waveguide leak-proof plate and the second waveguide leak-proof plate are each used to connect to a waveguide tube. An opening which matches the size of the waveguide tube is preset at the respective center position of the first waveguide leak-proof plate and of the second waveguide leak-proof plate, multiple gaps are provided around the openings, the positions of the gaps are staggered with one another, and the range of the mutual inclination of the gaps is 0-30 degrees. The present invention can simplify installation errors of a flange ring, effectively inhibit waveguide signal leakage, reduce the abutting distance and rotational degree tolerance requirements of the flange ring, reduce installation requirements, and facilitate actual operation.

Description

Waveguide interface structure for preventing electromagnetic wave signal leakage

Technical field

The invention belongs to the field of electromagnetic wave signal processing, and more specifically relates to a waveguide interface structure for preventing electromagnetic wave signal leakage.

Background technique

Rectangular air waveguides or air-ridged waveguides are commonly used internal interconnection transmission lines in microwave systems, which are mostly used for the interconnection of microwave system components (such as amplifiers, mixers, frequency multipliers, detectors, and antennas).

PCT International Patent Publication No. WO2008108388 discloses a split-type waveguide circuit. The technical solution of the patent application is to cover a metal cover at the end of the traveling direction of the wave and fix it with screws. At the same time, set a metal cover with the end of the metal cover. The overlapped radio wave leakage prevention plate is used to prevent radio wave leakage. The technical solution of the invention prevents leakage at the signal detection port of the actual electromagnetic wave system, but it is not generally applicable to standard waveguide interconnection.

In the actual electromagnetic wave system application of the waveguide interface, especially the microwave millimeter wave and terahertz frequency system application, the staff often need to connect the two waveguides. The current common connection method is to connect the flange ring. However, because of the traditional Most of the waveguides are deconstructed metal tubes. The size of the flange ring is often larger than the cross section of the waveguide, and the connection of the flange ring is usually fixed by screws, bolts, rivets, etc. In the actual communication operation, not only the space of the flange ring needs to be considered, but also It is also necessary to consider leaving extra space to allow tools such as screwdrivers to penetrate to tighten the screws. In addition, in the aerospace field, the flange ring screws occupy additional weight and space, which will greatly limit the size of the system to minimize .

technical problem

In order to solve the above-mentioned installation error of the flange ring and reduce the butt distance and rotation tolerance requirements of the flange ring, the present invention provides a waveguide interface structure that prevents electromagnetic wave signal leakage.

Technical solutions

A structure for preventing electromagnetic wave signal leakage. A first waveguide leakage prevention plate and a second waveguide leakage prevention plate are respectively provided. The surfaces of the first waveguide leakage prevention plate and the second waveguide leakage prevention plate are conductive metal surfaces. The first waveguide anti-leakage plate and the second waveguide anti-leakage plate are respectively used for connecting the waveguide.

Further, the surfaces of the first waveguide leakage prevention plate and the second waveguide leakage prevention plate are provided with a plurality of notches, and the central positions of the first waveguide leakage prevention plate and the second waveguide leakage prevention plate are provided with waveguide openings.

Further, the shape of the notch and the opening can be circular, rectangular, or elliptical.

Further, the connection of the first waveguide leak-proof plate and the second waveguide leak-proof plate with the flange ring can be connected by glue, magnetic attraction, screws, and bolts.

Further, the notch positions of the first waveguide leak-proof plate and the second waveguide leak-proof plate are staggered, and the notch sizes and shapes are different.

Further, the notch may penetrate through the waveguide leakage prevention plate.

Further, the distance between the bottom of the notch and the substrate of the waveguide leakage prevention plate is 0.1mm-2mm.

Beneficial effect

Adopting the structure for preventing electromagnetic wave signal leakage of the present invention can simplify the installation error of the flange ring, effectively suppress the leakage of the waveguide signal, reduce the docking distance and rotation tolerance requirements of the flange ring, reduce the installation requirements, and facilitate actual operation.

Description of the drawings

figure 1: The structure diagram of the present invention to prevent electromagnetic wave signal leakage;

Figure 2: Schematic diagram of the waveguide anti-leakage plate of the present invention;

Figure 3: Side view of the wave guide anti-leakage plate of the present invention;

Figure 4: A schematic diagram of the assembly of the waveguide leakage prevention plate of the present invention;

Figure 5: Installation side view of the waveguide leakage prevention structure of the present invention;

Figure 6: The signal transmission loss measurement diagram of the electromagnetic wave prevention structure.

The best mode of the present invention

Hereinafter, reference will be made to the preferred embodiments of the present invention in detail, and examples thereof are shown in the accompanying drawings. Although the present invention will be described in conjunction with the preferred embodiments, those skilled in the art should understand that these embodiments do not limit the present invention to these implementations. For example, on the contrary, the present invention is intended to cover alternatives, modifications and equivalents that may be included within the spirit and scope of the invention as defined by the appended claims. In addition, in the following detailed description of the present invention, many specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without these specific details.

Please refer to FIG. 1, a schematic diagram of the structure of the present invention for preventing electromagnetic wave signal leakage, which is composed of a first waveguide 10, a second waveguide 20, a first waveguide leakage prevention plate 30, and a second waveguide leakage prevention plate 31. Screw holes (not shown in the figure) are reserved on the surfaces of the first waveguide leakage prevention plate 30 and the second waveguide leakage prevention plate 31 to facilitate fixing operations. The surfaces of the first waveguide anti-leakage plate 30 and the second waveguide anti-leakage plate 31 are conductive metal surfaces, and the substrates can be made of common substrates, such as PVC and other materials. The first waveguide anti-leakage plate 30 and the second waveguide anti-leakage plate 31 are respectively connected to the waveguide, and the connection method can be made by adhesive, magnetic attraction, screws, bolts, and the like.

Please refer to Figure 2, a schematic diagram of the waveguide leakage prevention plate of the present invention. The waveguide leakage prevention plate is divided into two parts, which are respectively arranged on the two flange ring surfaces to be butted. The first waveguide leakage prevention plate 30 and the second waveguide The surface of the anti-leakage plate 31 is provided with a plurality of circular notches 40. The notches 40 can either penetrate the first waveguide anti-leakage plate 30 and the second waveguide anti-leakage plate 31, or maintain a certain depth, depending on the specific waveguide. Frequency needs, for example, it can be usually 20-1000 The frequency of electromagnetic waves in GHz. In particular, the notch 40 does not completely correspond to the positions of the first waveguide leakage prevention plate 30 and the second waveguide leakage prevention plate 31, and the two have a certain position staggered. The first waveguide leakage prevention plate 30 and the second waveguide leakage prevention plate The respective center positions of 31 are preset with openings 60 matching the size of the waveguide. It should be noted that the shapes of the notch 40 and the opening 60 in FIG. 2 are not limited to this. For example, the opening 60 may also have other shapes, such as irregular shapes such as a circle, a rectangle, an ellipse, and a cross; similarly, The notch 40 may also have other suitable shapes.

Please refer to FIG. 3 a side view of the waveguide leakage prevention plate of the present invention. For the convenience of description, FIG. 3 only uses the first waveguide leakage prevention plate 30 as an example for illustration. The notches 40 are equally spaced in the first waveguide leakage prevention plate 30. On the surface, the substrate 50 of the first waveguide leakage prevention plate 30 can be connected to the flange ring by means of double-sided tape, magnets, etc.

Please refer to FIG. 4, a schematic diagram of the assembly of the waveguide anti-leakage plate of the present invention. As shown in FIG. 4, the first waveguide anti-leakage plate 30 and the second waveguide anti-leakage plate 31 are assembled, and the waveguide opening 60 is deliberately tilted no more than 30 degrees. In this case, the waveguide signal can still be effectively conducted, which can effectively suppress the leakage of the waveguide signal, simplify the installation error of the flange ring, and reduce the docking distance and rotation tolerance requirements.

Please refer to FIG. 5 for the installation side view of the waveguide anti-leakage structure of the present invention. When the first waveguide anti-leakage plate 30 and the second waveguide anti-leakage plate 31 are actually assembled, a certain gap 70 is reserved, and the distance of the gap 70 generally does not exceed 50um. .

Please refer to Fig. 6 the signal transmission loss measurement diagram of the electromagnetic wave leakage prevention structure of the present invention, and simulate the transmission loss when the waveguide opening rotates 0 degrees and 10 degrees rotation mismatch in the case of a 50um gap. The red waveform in the figure is the waveguide opening 60 rotation The electromagnetic wave signal diagram at 0 degrees, and the purple waveform is the signal transmission loss measurement diagram when the waveguide opening 60 is rotated by 10 degrees. It can be clearly seen that the leakage of electromagnetic wave signals is within the control range. The experimental results show that under the above assembly conditions The waveguide interface can work perfectly, and electromagnetic wave leakage can be neglected.

Taking the actual application frequency 110-170 GHz air opening waveguide as an example, the size of the waveguide opening 60 is set to 1.65mm x 0.86mm. The depth of the design notch 40 is 4.9 mm, the diameter of the notch 40 is 0.9mm, and the spacing of the notch 40 is 1.1mm, the installation of the first waveguide anti-leakage plate 30 and the second waveguide anti-leakage plate 31 is shown in Figures 4 and 5. The rotation angle of the first waveguide anti-leakage plate 30 and the second waveguide anti-leakage plate 31 does not exceed When installed at 30°, the experimental results show that good waveguide transmission and good matching can still be ensured.

It should be clear to those skilled in the art that the installation views of the first and second waveguide anti-leakage plates described above are only schematic diagrams, and there are many alternative methods for practical applications. For example, the gap 70 may not be reserved, or the gap may not be reserved. The distance of 70 can also be less than 50um, as long as the modification does not deviate from the spirit of the present invention, it is within the protection scope of the present invention.

By adopting the processing method for preventing electromagnetic wave signal leakage of the present invention, the installation error of the flange ring can be simplified, the electromagnetic wave signal leakage can be effectively suppressed, the docking distance and rotation tolerance requirements are reduced, the installation requirements are reduced, and the actual operation is convenient.

Claims

A waveguide interface structure for preventing electromagnetic wave signal leakage, which is characterized in that a first waveguide leakage prevention plate and a second waveguide leakage prevention plate are respectively provided, and the surfaces of the first waveguide leakage prevention plate and the second waveguide leakage prevention plate are conductive The first waveguide leak-proof plate and the second waveguide leak-proof plate are respectively used for connecting the wave guide.
The waveguide interface structure for preventing electromagnetic wave signal leakage according to claim 1, wherein a plurality of notches are provided on the surfaces of the first waveguide leakage prevention plate and the second waveguide leakage prevention plate, and the first waveguide leakage prevention plate and the second waveguide leakage prevention plate are provided with a plurality of notches. The waveguide openings are respectively arranged at the center of the waveguide leakage prevention plate.
The waveguide interface structure for preventing electromagnetic wave signal leakage according to claim 2, wherein the shape of the notch and the opening can be a circle, a rectangle, an ellipse, or a cross.
The waveguide interface structure for preventing electromagnetic wave signal leakage according to claim 1, wherein the first waveguide leak-proof plate and the second waveguide leak-proof plate and the waveguide can be made of glue, magnetic attraction, screws, and bolts. Make a connection.
The waveguide interface structure for preventing electromagnetic wave signal leakage according to claim 2, wherein the notch positions of the first waveguide leakage prevention plate and the second waveguide leakage prevention plate are staggered.
The waveguide interface structure for preventing electromagnetic wave signal leakage according to claim 2, wherein the notch can penetrate the first waveguide leakage prevention plate or the second waveguide leakage prevention plate.
The waveguide interface structure for preventing electromagnetic wave signal leakage according to claim 2, wherein the distance between the bottom of the notch and the substrate of the waveguide leakage prevention plate is 0.1mm-2mm.
The waveguide interface structure for preventing electromagnetic wave signal leakage according to claim 2, wherein the inclination of the gaps of the first waveguide anti-leakage plate and the second waveguide anti-leakage plate are in a range of 0-30 degrees.