CN111710940A

CN111710940A - Structure for preventing electromagnetic wave signal leakage

Info

Publication number: CN111710940A
Application number: CN202010688130.4A
Authority: CN
Inventors: 何仲夏; 陈国胜; 程文婷
Original assignee: Shengweilun Shenzhen Communication Technology Co ltd
Current assignee: Shengweilun Shenzhen Communication Technology Co ltd
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2020-09-25
Also published as: WO2022011804A1

Abstract

The invention provides a structure for preventing electromagnetic wave signal leakage, which comprises an anti-leakage gasket, wherein a base material of the anti-leakage gasket is made of a microwave dielectric plate, a plurality of metal layers are arranged in the middle position of an inner layer of the anti-leakage gasket along the length direction, the metal layers are laid on the surface of the base material and/or embedded in the base material, the metal layers can be through holes or blind holes, and when the blind holes are adopted, the depth of the blind holes is determined according to the frequency of electromagnetic waves. By adopting the structure for preventing electromagnetic wave signal leakage, the PCB gasket with the metal layer laid on the surface of at least one substrate and/or the metal layer embedded in the substrate is arranged on the ring surface of the waveguide flange, so that the electromagnetic wave leakage can be effectively inhibited, the mounting difficulty of the flange ring is simplified, the requirements on the butt joint distance and the tolerance of the rotation degree are reduced, the design and manufacturing cost is reduced, and the large-scale commercial popularization and application are facilitated.

Description

Structure for preventing electromagnetic wave signal leakage

Technical Field

The invention belongs to the field of communication, and particularly relates to an anti-leakage processing structure of electromagnetic wave signals.

Background

In the transmission process of electromagnetic waves, flange rings are often used for connecting different waveguide interfaces, rectangular air waveguides or air ridge waveguides are commonly used as additional interconnection transmission lines of a microwave electromagnetic wave system, and the two structures are mainly used for interconnection and intercommunication of microwave system components such as amplifiers, mixers, frequency multipliers, detectors and antennas. Traditional waveguide is mostly the tubulose deconstruction of metal, is furnished with the convenient alignment of flange ring and connects, and the size of flange ring often is greater than the waveguide cross-section, because flange ring size has fixed dimension, and then has limited microwave electromagnetic wave system's volume and weight, the connection of flange ring is fixed with screw commonly used in addition, not only need consider the space and the volume of flange ring when the system is assembled, still need consider to reserve extra space to thereby allow tools such as screwdrivers to visit the screw of screwing up.

Patent application WO2017192071 by Gapwaves corporation in 2016, 5, 3 discloses an arrangement structure for interconnection of waveguide structures, wherein the needle-shaped structure in the technical scheme of the patent can play a role in preventing electromagnetic waves from leaking out of a medium, but the structure has a large volume and needs a certain physical mode for fixing, so that the operation difficulty in actual operation is high, the operation requirement is high, and the actual operation is not facilitated.

Published by the university of Chalmers in sweden in 2013, month 10 [ ridge-gap waveguide technology in millimeter wave applications ], the article address is: (http:// publications. lib. membranes. se/records/full/185520/185520. pdf). The paper discloses a mushroom-type periodic structure based on a PCB, which is used for replacing a waveguide wall to further construct a waveguide transmission structure, and the application is developed aiming at developing the side leakage of electromagnetic waves of the waveguide wall, and cannot directly solve the problem of electromagnetic wave leakage of a waveguide port.

Chinese patent publication No. CN110690535A proposes a structure for preventing electromagnetic wave signal leakage, in which a waveguide leakage-preventing plate is adopted to prevent electromagnetic wave leakage, and a plurality of protrusions are disposed on the surface of the waveguide leakage-preventing plate, so that the processing process is complicated.

JP5162677B2, applied 24/2/2011 by NTT Docomo, utilizes a mushroom-like structure as a frequency selective reflection surface, which can guide electromagnetic waves in a certain frequency range, but is complicated in manufacturing, high in cost, and not suitable for large-scale commercial popularization.

Therefore, the technical scheme in the prior art needs to be further improved, a novel structure for preventing electromagnetic wave signal leakage is developed, electromagnetic wave leakage is effectively inhibited, the installation difficulty of the flange ring is simplified, the requirements on the butt joint distance and the rotation tolerance are reduced, meanwhile, the design and manufacturing cost is reduced, and the large-scale commercial popularization and application are facilitated.

Disclosure of Invention

In order to solve the above-mentioned deficiencies of the prior art, the present invention provides a structure for preventing electromagnetic wave signal leakage, the technical solution is as follows:

the structure for preventing electromagnetic wave signals from being leaked comprises an anti-leakage gasket, wherein a base material of the anti-leakage gasket is made of a microwave dielectric plate, a plurality of metal layers are arranged in the middle of the inner layer of the base material of the anti-leakage gasket along the length direction, and the surface of the base material is provided with the metal layers or the metal layers embedded in the base material.

Further, the metal layer may be a through hole or a blind hole penetrating through the substrate.

Further, the depth of the blind hole is determined according to the frequency of the electromagnetic wave.

Further, the shape of the metal layer may be any one of a circle, a square, a diamond, an S-shape, or a combination thereof.

Furthermore, the leakage-proof gasket can be fixed in any one of the modes of magnetic attraction, adhesion, screws, bolts and pushing.

By adopting the electromagnetic wave signal leakage prevention structure, the PCB gasket with the metal layer laid on the surface of at least one base material or embedded in the base material is arranged on the ring surface of the waveguide flange, so that the electromagnetic wave leakage can be effectively inhibited, the mounting difficulty of the flange ring is simplified, the requirements on butt joint distance and rotation tolerance are reduced, the design and manufacturing cost is reduced, and the large-scale commercial popularization and application are facilitated.

Drawings

FIG. 1: the invention provides a side view of a structure for preventing electromagnetic wave signals from leaking.

FIG. 2: the invention provides a cut-away view of a structure for preventing electromagnetic wave signals from leaking.

FIG. 3: a front view of the gasket construction of the present invention.

FIG. 4: the gasket structure of the invention is installed schematically.

FIG. 5: the invention discloses a gasket object diagram.

FIG. 6: the invention provides an insertion loss S21 simulation waveform diagram of an electromagnetic wave signal leakage prevention structure.

FIG. 7: the invention provides a return loss S11 simulation waveform diagram of an electromagnetic wave signal leakage prevention structure.

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 side view of the electromagnetic wave signal leakage prevention structure of the present invention is shown, which comprises a first waveguide 10, a second waveguide 20 and a leakage prevention gasket 30, wherein at least one leakage prevention gasket 30 is provided, a metal layer is laid on a surface of the leakage prevention gasket 30 and/or a metal layer is embedded in a substrate, and the substrate of the leakage prevention gasket 30 may be made of a common microwave dielectric plate or other materials. Further, the leakage-proof gasket 30 can be fixed by magnetic attraction, adhesion, screws, bolts, pushing and the like, so as to facilitate installation in a practical operation mode in engineering.

Referring to fig. 2, a cut-away view of the electromagnetic wave signal leakage prevention structure of the present invention further includes a flange 40, a metal layer 50 and a metal hole 60, the metal layer is embedded in the middle position of the inside of the leakage prevention gasket 30 along the length direction, the metal layer and the substrate together guide and prevent the leakage of the electromagnetic wave, the metal hole 60 may be a through hole or a blind hole, specifically, the depth of the metal hole 60 may be adjusted by the actual electromagnetic wave frequency to be adjusted, and the shape of the metal hole 60 may be any one or a combination of a circle, a square, a diamond, and an S shape, or may be other irregular shapes, which is not limited in this respect.

Referring to fig. 3, a front view of the spacer structure of the present invention, the spacer structure has a waveguide opening in the middle square and may have one or more circles of openings in its outer periphery. When the double-gasket structure is adopted for waveguide leakage prevention treatment, the other gasket provided with the through hole and the gasket structure in fig. 3 are staggered as shown in fig. 4, and comprise a waveguide structure 70, a PCB gasket 80 and a positioning hole 90, taking the WR-6.5 air opening waveguide with the frequency of 110 plus 170 GHz as an example, the waveguide opening is 1.65mm x 0.86mm, the gasket substrate material is designed to have the dielectric constant of 2.8, iso 1-680, the thickness of 0.23mm, W =0.3mm, G =0.12mm, the PCB patch is provided with an extension arm, the extension arm can also be provided with the through hole, so that the PCB patch can be fixed on a flange ring pin, the gasket is clamped between flanges, and the gasket after processing is shown in fig. 5.

Referring further to fig. 6, a simulation waveform diagram of insertion loss S21 of the structure for preventing electromagnetic wave signal leakage according to the present invention, when a gap of 75um and a gap do not exist between the flange ring and the leakage prevention gasket 30, respectively, waveforms of simulation and test results of the insertion loss S21 are substantially the same, and the electromagnetic wave signal leakage is within a controllable range.

Referring further to fig. 7, a waveform diagram of the return loss S11 simulation of the structure for preventing electromagnetic wave signal leakage according to the present invention, when a gap of 75um and a gap do not exist between the flange ring and the leakage-preventing gasket 30, respectively, waveforms of simulation and test results of the return loss S11 are substantially the same, and the electromagnetic wave signal leakage is within a controllable range.

By adopting the electromagnetic wave signal leakage prevention structure, the PCB gasket with the metal layer laid on the surface of at least one substrate and/or the metal layer embedded in the substrate is arranged on the ring surface of the waveguide flange, so that the electromagnetic wave leakage can be effectively inhibited, the mounting difficulty of the flange ring is simplified, the requirements on the butt joint distance and the tolerance of the rotation degree are reduced, the design and manufacturing cost is reduced, and the large-scale commercial popularization and application are facilitated.

Claims

1. The structure for preventing electromagnetic wave signals from being leaked is characterized by comprising an anti-leakage gasket, wherein a base material of the anti-leakage gasket is made of a microwave dielectric plate, a plurality of metal layers are arranged in the middle of an inner layer of the anti-leakage gasket along the length direction, and a metal layer is laid on the surface of the base material and/or a metal layer is embedded in the base material.

2. The structure of claim 1, wherein the metal layer is a through-hole or a blind-hole through the substrate.

3. The structure of claim 2, wherein the depth of said blind hole is determined according to the frequency of the electromagnetic wave.

4. The structure of claim 1, wherein the shape of the metal layer can be any one of a circle, a square, a diamond, an S-shape, or a combination thereof.

5. The structure of claim 1, wherein the anti-leakage gasket is fixed by any one of magnetic attraction, adhesion, screws, bolts and pushing.