阅读说明：本技术 一种e波段的矩形波导衰减器的制作方法 (Manufacturing method of E-band rectangular waveguide attenuator ) 是由 柏友国 夏文兵 朱小群 熊超 杨瑞萍 夏媛 丁胜 杨亚萍 于 2021-01-29 设计创作，主要内容包括：本发明公开了一种E波段的矩形波导衰减器的制作方法,包括以下步骤：制作厚度为S的耦合金属件；在两个矩形波导管之间装配耦合金属件作为耦合孔；在两个矩形波导管内分别装载负载。本发明的有益效果是通过此结构,可以把影响电气性能指标的关键零件耦合金属件单独分开加工,然后再与两个矩形波导管组合装配在一起。从而实现精密的波导衰减性能。在E波段的71-76GHz和81-86GHz的10GHz带宽的波段范围内,分别实现了3.5+-1dB的精密衰减；并分别在输入端口与输出端口的E面和H面取得大于20dB的回波损耗值。(The invention discloses a method for manufacturing a rectangular waveguide attenuator of an E wave band, which comprises the following steps: manufacturing a coupling metal piece with the thickness of S; assembling a coupling metal piece between the two rectangular wave guide pipes to be used as a coupling hole; loads are loaded in the two rectangular waveguides respectively. The invention has the beneficial effect that through the structure, key parts coupling metal parts influencing the electrical performance index can be separately processed and then combined and assembled with the two rectangular wave guide tubes. Thereby achieving precise waveguide attenuation performance. The precision attenuation of 3.5+ -1dB is respectively realized in the band ranges of the bandwidths of 10GHz of 71-76GHz and 81-86GHz of the E band; and return loss values greater than 20dB are obtained on the E surface and the H surface of the input port and the output port respectively.)

1. A method for manufacturing an E-band rectangular waveguide attenuator is characterized by comprising the following steps: the method comprises the following steps: manufacturing a coupling metal piece with the thickness of S; assembling a coupling metal piece between the two rectangular wave guide pipes to be used as a coupling hole; loads are loaded in the two rectangular waveguides respectively.

2. The method for manufacturing an E-band rectangular waveguide attenuator of claim 1, wherein: the coupling metal piece is any one of copper, steel, iron and magnesium.

3. The method for manufacturing an E-band rectangular waveguide attenuator of claim 1, wherein: the thickness S is 0.1 mm.

4. The method for manufacturing an E-band rectangular waveguide attenuator of claim 1, wherein: the rectangular waveguide has dimensions of 3.10 x 1.55 mm.

5. The method for manufacturing an E-band rectangular waveguide attenuator of claim 1, wherein: the coupling metal piece is assembled with the two rectangular wave guide tubes through an etching processing technology.

Technical Field

The invention relates to the field of electronic communication, in particular to a manufacturing method of an E-band rectangular waveguide attenuator.

Background

Microwave waveguide signal transmission is one of indispensable devices in modern wireless communication systems, and plays an important role in signal transmission. Among them, the waveguide is widely used in various communication devices because of its small loss and convenient processing. In practical use, communication equipment needs to simulate the attenuation of signals transmitted and received by communication signals, and a rectangular waveguide attenuation device can be directly designed to simulate the function. A conventional rectangular waveguide attenuator is shown in fig. 1-3. In a four port network, the second port 2 and the fourth port 4 are each loaded with a matched absorption load. Microwave communication signals enter the rectangular waveguide from the second port and pass through the coupling hole 5, the signals are output from the third port 3 and the fourth port 4 respectively, the first port 1 and the fourth port 4 are connected to a matched load respectively, and only the third port 3 has the signal output after coupling attenuation. The traditional processing scheme is realized by adopting a mode that the front and the back of a cavity are processed and the shielding cover plates 6 are respectively arranged from top to bottom.

For example, the chinese patent publication No. CN105070995B discloses a novel waveguide attenuator, which comprises three rectangular waveguides parallel to each other, wherein the wide sides of the adjacent rectangular waveguides are coupled and connected through a plurality of coupling holes; for another example, chinese publication No. CN106450635A discloses an integrated microwave waveguide coupler, which includes multiple waveguide polarizers, and coupling holes are provided between waveguide cavities, and the coupling holes of these 2 patents are implemented by a method of processing the front and back surfaces of a cavity, and are still not suitable for manufacturing a rectangular waveguide attenuator in the E-band.

Since the standard size of the rectangular waveguide is 3.10 × 1.55MM in the E band of 80 ghz, a strong coupling structure of the coupler is realized at this small size, the coupling gap of the two rectangular waveguides needs to reach a thickness of 0.1MM, and a coupling hole needs to be processed at a thickness of 0.1 MM. From the viewpoint of machining, mass production of an alloy aluminum material may not be possible for a while.

Disclosure of Invention

The technical problem to be solved by the invention is that the existing rectangular waveguide attenuator cannot be machined into a rectangular waveguide attenuator for an E waveband, so that a manufacturing method of the rectangular waveguide attenuator for the E waveband is provided.

On the basis of realizing the replacement of the design scheme, the invention replans the design method, so that the coupling signal can be attenuated within a controllable range, thereby realizing the realization of mass production. And the scheme can be subjected to a series of reliability tests of vibration, impact, high temperature, low temperature and the like.

The technical scheme of the invention is as follows: a manufacturing method of an E-band rectangular waveguide attenuator comprises the following steps: manufacturing a coupling metal piece with the thickness of S; assembling a coupling metal piece between the two rectangular wave guide pipes to be used as a coupling hole; loads are loaded in the two rectangular waveguides respectively.

In the scheme, the coupling metal piece is any one of copper, steel, iron and magnesium.

In the scheme, the thickness S is 0.1 mm.

The dimensions of the rectangular waveguide in the above scheme are 3.10 x 1.55 mm.

In the scheme, the coupling metal piece is assembled with the two rectangular wave guide tubes through an etching processing technology.

The invention has the beneficial effect that through the structure, key parts coupling metal parts influencing the electrical performance index can be separately processed and then combined and assembled with the two rectangular wave guide tubes. Thereby achieving precise waveguide attenuation performance. The precision attenuation of 3.5+ -1dB is respectively realized in the band ranges of the bandwidths of 10GHz of 71-76GHz and 81-86GHz of the E band; and return loss values greater than 20dB are obtained on the E surface and the H surface of the input port and the output port respectively.

Drawings

FIG. 1 is a schematic diagram of a prior art rectangular waveguide attenuator;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a schematic cross-sectional view of FIG. 1;

FIG. 4 is a side view of a rectangular waveguide attenuator structure of the present invention;

FIG. 5 is a graph of a test of the present invention;

in the figure, 1, a first load, 2, a second load, 3, a first rectangular waveguide, 4, a second rectangular waveguide, 5, a coupling hole, 6, a cover plate, 7, a first port, 8, a second port, 9, a third port, 10, and a fourth port.

Detailed Description

The technical scheme in the embodiment of the invention is clearly and completely described below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments based on the embodiments in the present invention, without any inventive work, will be apparent to those skilled in the art from the following description.

As shown in fig. 4, a method for manufacturing an E-band rectangular waveguide attenuator includes the following steps: manufacturing a coupling metal piece with the thickness of S; assembling a coupling metal piece between the two rectangular wave guide pipes to be used as a coupling hole; loads are loaded in the two rectangular waveguides respectively. The cavity mounting structure is divided into 5 parts, and a coupling metal piece 5 with the thickness S is mounted between the first rectangular waveguide tube 3 and the second rectangular waveguide tube 4. A load 1 and a second load 2 are fitted in the first rectangular waveguide 1 and the second rectangular waveguide 2, respectively.

The coupling metal member in the present invention may be any one of easily machinable metals such as copper, steel, iron, magnesium, etc. The coupling metal piece and the waveguide can be assembled by corrosion machining or other known machining methods, and the coupling metal piece with the thickness S of 0.1mm can be machined by the machining methods.

Fig. 5 shows a test curve of the practical application of the finished product of the present invention. The precision attenuation of 3.5+ -1dB is respectively realized in the band ranges of the bandwidths of 10GHz of 71-76GHz and 81-86GHz of the E band; and return loss values greater than 20dB are obtained on the E surface and the H surface of the input port and the output port respectively.