阅读说明：本技术 一种防止电磁波信号泄露的波导接口结构 (Waveguide interface structure for preventing electromagnetic wave signal leakage ) 是由 何仲夏 刘锦霖 陈国胜 梁稳 于 2019-10-09 设计创作，主要内容包括：本发明提供一种防止电磁波信号泄露的结构,包括波导防泄漏板,波导防泄漏板的表面是导电性金属表面,波导防泄漏板的表面设置了多个突出,在波导防泄漏板的中心位置设置波导开口,波导防泄漏板用于连接波导管。采用本发明的防止电磁波信号泄露的接口结构,在波导接口有缝隙或者波导口存在旋转误差或水平对置误差时,可以有效抑制电磁波泄露,控制电磁波泄露在可控范围内,同时降低对接距离和旋转度公差要求,简化波导模块设计,实现磁铁吸附或拼插等无螺丝组装方式,降低了安装要求,便于实际操作。(The invention provides a structure for preventing electromagnetic wave signal leakage, which comprises a waveguide leakage-proof plate, wherein the surface of the waveguide leakage-proof plate is a conductive metal surface, a plurality of protrusions are arranged on the surface of the waveguide leakage-proof plate, a waveguide opening is arranged at the center of the waveguide leakage-proof plate, and the waveguide leakage-proof plate is used for connecting a waveguide tube. By adopting the interface structure for preventing electromagnetic wave signal leakage, when a waveguide interface has a gap or a waveguide port has a rotation error or a horizontal contraposition error, the electromagnetic wave leakage can be effectively inhibited, the electromagnetic wave leakage is controlled within a controllable range, the requirements on butt joint distance and rotation tolerance are reduced, the design of a waveguide module is simplified, the screw-free assembly modes such as magnet adsorption or splicing insertion are realized, the installation requirements are reduced, and the actual operation is facilitated.)

1. The waveguide interface structure for preventing electromagnetic wave signal leakage is characterized by comprising a waveguide leakage-proof plate, wherein the surface of the waveguide leakage-proof plate is a conductive metal surface, a plurality of protrusions are arranged on the surface of the waveguide leakage-proof plate, a waveguide opening is arranged in the center of the waveguide leakage-proof plate, and the waveguide leakage-proof plate is used for being connected with a waveguide tube.

2. The waveguide interface structure for preventing the leakage of electromagnetic wave signals as claimed in claim 1, wherein the shape of said protrusion and said opening can be one or a combination of circular, rectangular, oval, and cross.

3. The waveguide interface structure for preventing electromagnetic wave signal leakage according to claim 1, wherein the waveguide leakage preventing plate and the waveguide tube are connected by using adhesive, magnetic attraction, screws, or bolts.

4. The waveguide interface structure for preventing electromagnetic wave signal leakage as claimed in claim 1, wherein said waveguide opening can be a WR10 interface, a WR12 interface or a WR15 interface.

5. The waveguide interface structure for preventing the leakage of electromagnetic wave signals as claimed in claim 1, wherein said waveguide leakage preventing plate can be made of any one of microwave PCB substrate, FPC, silicon chip or their combination.

6. The waveguide interface structure for preventing leakage of electromagnetic wave signals as claimed in claim 1, wherein said protrusions are electrically connected to one side of the waveguide leakage-preventing plate, or are electrically connected to both sides of the waveguide leakage-preventing plate by penetrating the waveguide leakage-preventing plate.

7. The waveguide interface structure for preventing leakage of electromagnetic wave signals as claimed in claim 6, wherein said protrusion and said waveguide leakage preventing plate are also insulatively connected.

8. The waveguide interface structure for preventing leakage of electromagnetic wave signals as set forth in claim 1, wherein said protrusions are electrically connected to each other or insulated from each other.

9. The waveguide interface structure for preventing leakage of electromagnetic wave signals as claimed in claim 1, wherein said protruding bottom is spaced from the substrate of the waveguide leakage preventing plate by a distance of 0.1mm to 2 mm.

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 practical application of the electromagnetic wave system of the waveguide interface, in particular to the application of the microwave millimeter wave and terahertz frequency band system, it is often necessary for a worker to connect two waveguides, and it is common to connect them by a flange ring, however, because most of the traditional waveguides are in a metal tubular structure, the size of the flange ring is often larger than the cross section of the waveguide, therefore, the flange ring is usually fixed by a plurality of screws, bolts, rivets and the like, and workers are required to accurately position the positioning pins so as to accurately connect the waveguide interfaces, in the actual communication operation, not only the space of the flange ring but also the extra space is required to allow a tool such as a screwdriver or a screwdriver to be inserted to tighten the screw, and in addition, in the aerospace field, the screws of the flange ring occupy extra weight and space, which greatly limits the volume minimization of the system.

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:

the waveguide interface structure comprises a waveguide leakage-proof plate, wherein the surface of the waveguide leakage-proof plate is a conductive metal surface, a plurality of protrusions are arranged on the surface of the waveguide leakage-proof plate, a waveguide opening is arranged in the center of the waveguide leakage-proof plate, and the waveguide leakage-proof plate is used for connecting a waveguide tube.

Further, the shape of the protrusion and the opening can be one of a circle, a rectangle, an ellipse, a cross or a combination thereof.

Furthermore, the waveguide leakage-proof plate and the waveguide tube can be connected by adopting gluing, magnetic attraction, screws and bolts.

Further, the waveguide opening may be a WR10 interface, or a WR12 interface or a WR15 interface.

Further, the waveguide leakage preventing plate may be made of any one of a microwave PCB (Printed Circuit board) substrate, an FPC (Flexible Printed Circuit board), a silicon wafer, or a combination thereof.

Furthermore, the protrusions can be electrically connected to one side of the waveguide leakage-proof plate, and can also penetrate through the waveguide leakage-proof plate and be distributed on two sides of the waveguide leakage-proof plate for electrical connection.

Further, the protrusions may also insulate the surface of the connection waveguide leakage preventing plate.

Further, the protrusions may be electrically connected to each other or insulated from each other.

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

By adopting the interface structure for preventing electromagnetic wave signal leakage, when a waveguide interface has a gap or a waveguide port has a rotation error or a horizontal contraposition error, the electromagnetic wave leakage can be effectively inhibited, the electromagnetic wave leakage is controlled within a controllable range, the requirements on butt joint distance and rotation tolerance are reduced, the design of a waveguide module is simplified, the screw-free assembly modes such as magnet adsorption or splicing insertion are realized, the installation requirements are reduced, and the actual operation is facilitated.

Drawings

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

FIG. 2: the invention relates to a cut-away view of a waveguide leakage-proof plate;

FIG. 3: the invention discloses a signal transmission loss measuring diagram of a waveguide leakage-proof 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 schematic structural diagram of the present invention for preventing electromagnetic wave signal leakage is composed of a waveguide 10, a second waveguide 20, and a waveguide leakage-preventing plate 30. Screw holes (not shown) are reserved at appropriate positions on the surface of the waveguide leakage preventing plate 30, so that the installation operation is facilitated. The surface of the waveguide leakage-proof plate 30 is a conductive metal surface, and the waveguide leakage-proof plate may be made of a microwave PCB substrate, or may be made of FPC, silicon wafer, or the like, and the substrate may be made of a common base material, such as PVC or the like. The waveguide leakage preventing plate 30 is used to connect the waveguide, and the connection can be performed by gluing, magnetic attraction, screws, bolts, and the like.

Referring to fig. 2, the waveguide leakage-proof plate of the present invention is shown in a cut-away view, the waveguide leakage-proof plate is disposed on the annular surface of the flange to be butted, the surface of the waveguide leakage-proof plate 30 is provided with a plurality of protrusions 40, the plurality of protrusions 40 form a periodic or quasi-periodic structure, the protrusions 40 can be electrically contacted with the surface of the waveguide leakage-proof plate 30, and can also be insulated from the surface of the waveguide leakage-proof plate 30, the protrusions 40 can be electrically connected with each other or insulated from each other, and the height and shape thereof can be varied in many ways, depending on the specific waveguide frequency requirement, for example, the electromagnetic wave frequency can be generally 20-1000 GHz, and the protrusions 40 can also penetrate the waveguide leakage-proof plate 30, in this case, the protrusions 40 extend a part of the length from both sides of the waveguide leakage-proof plate 30, and this design scheme is also within the protection scope of the present invention. An opening 50 matched with the waveguide tube in size is preset in the center of the waveguide leakage-proof plate 30, and the substrate of the waveguide leakage-proof plate 30 can be connected with the flange ring by means of double-sided adhesive tape, magnets and the like. It should be noted that the shapes of the protrusion 40 and the opening 50 in fig. 2 are not limited to this, for example, the opening 50 may also be other shapes, such as irregular shapes like circle, rectangle, ellipse, cross, etc.; similarly, the protrusions 40 may be of any other shape suitable for transmitting electromagnetic waves of a specific frequency.

Referring to FIG. 3, the signal transmission loss measurement diagram of the waveguide leakage-proof structure of the present invention is set as an example of electromagnetic frequency of 110-170 GHz, the thickness of the waveguide leakage-proof plate is 235um, the dielectric constant is 3 epsilon, the protrusion 40 is rectangular, and the area is about 300um²The area of the waveguide opening 50 is about 100um². The wave form of the dotted line in the figure is the wave form transmission diagram under the condition that the waveguide interface is not provided with the leakage-proof structure and the flange ring interface has a gap of 0.02mm, while the wave form of the solid line is the wave form transmission diagram under the condition that the waveguide leakage-proof structure is arranged, so that the transmission stability of electromagnetic wave signals can be obviously seen, the leakage amount is within the control range, and the experimental result shows that the waveguide interface can work perfectly under the assembling condition of applying the electromagnetic wave leakage-proof structure, the transmission stability of the electromagnetic wave signals is stable, and the leakage amount of the electromagnetic wave is within the controllable range and can be ignored.

It should be clear to those skilled in the art that the above-mentioned cut-away view of the waveguide leakage-proof board is only an example, and many variations may be made in practical application, for example, the waveguide interface may be a WR10 interface, a WR12 interface or a WR15 interface, or a waveguide interface of other specifications, and these waveguide interfaces may be rectangular interfaces or circular interfaces of different specifications, and all variations are within the protection scope of the present invention as long as they do not depart from the spirit of the present invention. In particular, it is within the scope of the present invention that the protrusion 40 may extend through the waveguide leakage prevention plate 30, in which case the protrusion 40 extends a portion of the way on both sides of the waveguide leakage prevention plate 30.

By adopting the interface structure for preventing electromagnetic wave signal leakage, when a waveguide interface has a gap or a waveguide port has a rotation error or a horizontal contraposition error, the electromagnetic wave leakage can be effectively inhibited, the electromagnetic wave leakage is controlled within a controllable range, the requirements on butt joint distance and rotation tolerance are reduced, the design of a waveguide module is simplified, the screw-free assembly modes such as magnet adsorption or splicing insertion are realized, the installation requirements are reduced, and the actual operation is facilitated.