CN110600838A

CN110600838A - Waveguide interface structure for preventing electromagnetic wave signal leakage

Info

Publication number: CN110600838A
Application number: CN201910894665.4A
Authority: CN
Inventors: 何仲夏; 刘锦霖; 陈国胜; 梁稳
Original assignee: Shengweilun Shenzhen Communication Technology Co Ltd
Current assignee: Shengweilun Shenzhen Communication Technology Co Ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2019-12-20
Also published as: WO2021051658A1

Abstract

The invention provides a waveguide interface structure for preventing electromagnetic wave signal leakage, which is respectively provided with a first waveguide leakage-proof plate and a second waveguide leakage-proof plate, wherein the surfaces of the first waveguide leakage-proof plate and the second waveguide leakage-proof plate are conductive metal surfaces, and the first waveguide leakage-proof plate and the second waveguide leakage-proof plate are respectively used for connecting waveguide tubes. The invention can simplify the installation error of the flange ring, effectively inhibit the waveguide signal leakage, reduce the butt joint distance and rotation tolerance requirements of the flange ring, reduce the installation requirements and facilitate the 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 particularly relates to a waveguide interface structure for preventing electromagnetic wave signal leakage.

Background

Rectangular air waveguides or air ridge waveguides are common internal interconnection transmission lines for microwave systems, and are often used for interconnection of microwave system components (e.g., amplifiers, mixers, frequency multipliers, detectors, antennas).

PCT international patent publication No. WO2008108388 discloses a divided waveguide circuit, in which a metal cover is covered on an end portion in a traveling direction of a waveguide electric wave and fixed with a screw, and an electric wave leakage prevention plate is provided to overlap with the end portion of the metal cover to prevent electric wave leakage. The technical scheme of the invention is used for preventing leakage at the signal detection port of an actual electromagnetic wave system, but is not generally suitable for standard waveguide interconnection.

In the application of an electromagnetic wave system of an actual waveguide interface, particularly in the application of a microwave millimeter wave and terahertz frequency band system, a worker often needs to connect two waveguides, and a flange ring is adopted for connection in a common connection mode at present, however, most of the traditional waveguides are metal tubular deconstructions, the size of the flange ring is often larger than the cross section of the waveguide, and the flange ring is usually fixed in a screw, bolt, rivet and other modes.

Disclosure of Invention

In order to solve the above problems, the present invention provides a structure for preventing electromagnetic wave signal leakage, and the technical scheme of the present invention is:

a structure for preventing electromagnetic wave signal leakage is provided with a first waveguide leakage-proof plate and a second waveguide leakage-proof plate respectively, the surfaces of the first waveguide leakage-proof plate and the second waveguide leakage-proof plate are conductive metal surfaces, and the first waveguide leakage-proof plate and the second waveguide leakage-proof plate are used for being connected with waveguide tubes respectively.

Furthermore, a plurality of gaps are arranged on the surfaces of the first waveguide leakage-proof plate and the second waveguide leakage-proof plate, and waveguide openings are arranged in the central positions of the first waveguide leakage-proof plate and the second waveguide leakage-proof plate.

Further, the shape of the notch and the opening can be round, rectangular or oval.

Furthermore, the first waveguide leakage-proof plate and the second waveguide leakage-proof plate can be connected with the flange ring by adopting gluing, magnetic attraction, screws and bolts.

Furthermore, the positions of the gaps of the first waveguide leakage-proof plate and the second waveguide leakage-proof plate are staggered, and the sizes and the shapes of the gaps are different.

Further, the notch may penetrate the waveguide leakage preventing plate.

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

By adopting the structure for preventing electromagnetic wave signal leakage, the mounting error of the flange ring can be simplified, the waveguide signal leakage can be effectively inhibited, the requirements of the butt joint distance and the rotation tolerance of the flange ring are reduced, the mounting requirement is reduced, and the actual operation is convenient.

Drawings

FIG. 1: the invention prevents the structure sketch map of the electromagnetic wave signal leakage;

FIG. 2: a schematic view of a waveguide anti-leakage plate of the present invention;

FIG. 3: a side view of the waveguide anti-leakage plate of the present invention;

FIG. 4: the invention is a schematic view of the assembly of the waveguide leakage-proof plate;

FIG. 5: the installation side view of the waveguide anti-leakage structure of the invention;

FIG. 6: a signal transmission loss measuring diagram of a structure for preventing electromagnetic wave leakage.

Detailed Description

Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, and while the invention will be described in connection with the preferred embodiments, it will be understood by those skilled in the art that these embodiments are not intended to limit the invention to these embodiments, but on the contrary, the invention is intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, it will be apparent to those skilled in the art that the present invention may be practiced without these specific details.

Referring to fig. 1, a schematic structural diagram of the present invention for preventing electromagnetic wave signal leakage is composed of a first waveguide 10, a second waveguide 20, a first waveguide leakage-preventing plate 30, and a second waveguide leakage-preventing plate 31. Screw holes (not shown) are reserved on the surfaces of the first waveguide leakage-proof plate 30 and the second waveguide leakage-proof plate 31 for facilitating the fixing operation. The surfaces of the first waveguide leakage-proof plate 30 and the second waveguide leakage-proof plate 31 are conductive metal surfaces, and the substrate can be made of common base materials, such as PVC. The first waveguide anti-leakage plate 30 and the second waveguide anti-leakage plate 31 are respectively connected to the waveguides in a manner of gluing, magnetic attraction, screws, bolts, and the like.

Referring to fig. 2, the waveguide leakage-proof plate of the present invention is schematically illustrated, the waveguide leakage-proof plate is divided into two parts, which are respectively disposed on two flange ring surfaces to be butted, a plurality of circular notches 40 are disposed on the surfaces of the first waveguide leakage-proof plate 30 and the second waveguide leakage-proof plate 31, and the notches 40 can either penetrate the first waveguide leakage-proof plate 30 and the second waveguide leakage-proof plate 31 or maintain a certain depth, which depends on the specific waveguide frequency requirement, for example, the electromagnetic wave frequency may be generally 20-1000 GHz. Specifically, the notches 40 do not completely correspond to the positions of the first waveguide leakage preventing plate 30 and the second waveguide leakage preventing plate 31, they are staggered, and an opening 60 matching the size of the waveguide is preset at the central position of each of the first waveguide leakage preventing plate 30 and the second waveguide leakage preventing plate 31. 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 be other shapes, such as irregular shapes like circle, rectangle, ellipse, cross, etc.; similarly, the notches 40 may have other suitable shapes.

Referring to fig. 3, a side view of the waveguide leakage preventing plate of the present invention is shown, for convenience of description, fig. 3 only illustrates the first waveguide leakage preventing plate 30, the notches 40 are disposed on the surface of the first waveguide leakage preventing plate 30 at equal intervals, and the substrate 50 of the first waveguide leakage preventing plate 30 can be connected to the flange ring by means of double-sided adhesive or magnets.

Referring to fig. 4, an assembly diagram of the waveguide leakage-proof plate of the present invention is shown in fig. 4, where a first waveguide leakage-proof plate 30 and a second waveguide leakage-proof plate 31 are assembled, and a waveguide signal can still be effectively conducted under the condition that a waveguide opening 60 is inclined by no more than 30 degrees, so as to effectively suppress the leakage of the waveguide signal, simplify the installation error of the flange ring, and reduce the tolerance requirements of the butting distance and the rotation degree.

Referring to fig. 5, an installation side view of the waveguide leakage-proof structure of the present invention is shown, wherein a certain gap 70 is reserved between the first waveguide leakage-proof plate 30 and the second waveguide leakage-proof plate 31 during actual assembly, and the distance between the gap 70 is generally not more than 50 um.

Referring to fig. 6, a signal transmission loss measurement diagram of the electromagnetic wave leakage prevention structure of the present invention simulates transmission loss under the condition of 0-degree rotation and 10-degree rotation mismatch of the waveguide opening in a gap of 50um, where a black triangle symbol waveform is an electromagnetic wave signal diagram under the condition of 0-degree rotation of the waveguide opening 60, and a black square symbol waveform is a signal transmission loss measurement diagram under the condition of 10-degree rotation of the waveguide opening 60, it can be clearly seen that the leakage amount of the electromagnetic wave signal is within a control range, and an experimental result shows that the waveguide interface can work perfectly under the above-mentioned assembly condition, and the electromagnetic wave leakage can be ignored.

Taking the frequency 110-plus 170 GHz air opening waveguide in practical application as an example, the dimensions of the waveguide opening 60 are set to 1.65mm x 0.86mm, the depth of the notch 40 is designed to be 4.9 mm, the diameter of the notch 40 is 0.9mm, the distance between the notches 40 is 1.1mm, and the first waveguide anti-leakage plate 30 and the second waveguide anti-leakage plate 31 are installed as shown in fig. 4 and 5.

It should be clear to those skilled in the art that the installation views of the first waveguide leakage-proof plate and the second waveguide leakage-proof plate are only schematic, and many variations are possible in practical applications, for example, the gap 70 may not be reserved, or the distance between the gaps 70 may be smaller than 50um, and all variations are within the protection scope of the present invention without departing from the spirit of the present invention.

The processing method for preventing electromagnetic wave signal leakage can simplify the installation error of the flange ring, effectively inhibit the electromagnetic wave signal leakage, reduce the requirements of butt joint distance and rotation tolerance, reduce the installation requirements and facilitate the actual operation.

Claims

1. The waveguide interface structure is characterized in that a first waveguide leakage-proof plate and a second waveguide leakage-proof plate are respectively arranged, the surfaces of the first waveguide leakage-proof plate and the second waveguide leakage-proof plate are conductive metal surfaces, and the first waveguide leakage-proof plate and the second waveguide leakage-proof plate are respectively used for connecting waveguide tubes.

2. The waveguide interface structure for preventing leakage of electromagnetic wave signals as claimed in claim 1, wherein the first waveguide leakage preventing plate and the second waveguide leakage preventing plate have a plurality of notches formed on their surfaces, and waveguide openings are formed at central positions of the first waveguide leakage preventing plate and the second waveguide leakage preventing plate, respectively.

3. The waveguide interface structure for preventing leakage of electromagnetic wave signals as claimed in claim 2, wherein said notches and openings have a shape of a circle, a rectangle, an ellipse, or a cross.

4. The waveguide interface structure for preventing electromagnetic wave signal leakage according to claim 1, wherein the first and second waveguide leakage preventing plates and the waveguide tube are connected by gluing, magnetic attraction, screws, or bolts.

5. The waveguide interface structure for preventing leakage of electromagnetic wave signals as claimed in claim 2, wherein the notches of said first waveguide leakage preventing plate and said second waveguide leakage preventing plate are staggered.

6. The waveguide interface structure for preventing leakage of electromagnetic wave signals as claimed in claim 2, wherein said notch may penetrate through the first waveguide leakage preventing plate or the second waveguide leakage preventing plate.

7. The waveguide interface structure for preventing leakage of electromagnetic wave signals as claimed in claim 2, wherein the distance from the bottom of said gap to the substrate of said waveguide leakage preventing plate is 0.1mm-2 mm.

8. The waveguide interface structure for preventing leakage of electromagnetic wave signals as claimed in claim 2, wherein the notches of said first waveguide leakage preventing plate and said second waveguide leakage preventing plate are inclined to each other in a range of 0 to 30 degrees.