Waveguide and microwave transmission device

Abstract

The utility model relates to the technical field of electromagnetic wave transmission, especially relates to a waveguide and microwave transmission device, the waveguide includes the first waveguide pipe and the second waveguide pipe of intercommunication, the second waveguide pipe one end opening the other end is closed, the first waveguide pipe one end is connected with the broad side of second waveguide pipe, the projection of first waveguide pipe on XY plane and the projection of second waveguide pipe on XY plane are perpendicular to each other, the broad side of first waveguide pipe is parallel with XY plane, the narrow side of second waveguide pipe is parallel with XY plane, the first waveguide pipe and second waveguide pipe cross section are same, provide a kind of waveguide of simple and compact structure, small volume light weight, the microwave transmission device includes the waveguide.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic wave transmission technology, and in particular to a waveguide and microwave transmission device. Background Technology

[0002] A waveguide is a hollow, smooth-walled metal conduit used to transmit ultra-high frequency electromagnetic waves. Through it, pulse signals can be transmitted to their destination with minimal loss.

[0003] like Figure 1 As shown, existing waveguides have complex structures, large volumes, and heavy weights, which are not conducive to the miniaturization of equipment and restrict their application prospects. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a waveguide with a simple and compact structure, small size and light weight.

[0005] Another objective of this invention is to provide a microwave transmission device that employs the aforementioned waveguide.

[0006] The objective of this utility model is achieved through the following technical solution: A waveguide includes a first waveguide and a second waveguide that are interconnected. One end of the second waveguide is open and the other end is closed. One end of the first waveguide is connected to the wide side of the second waveguide. The projections of the first waveguide on the XY plane and the projections of the second waveguide on the XY plane are perpendicular to each other. The wide side of the first waveguide is parallel to the XY plane, and the narrow side of the second waveguide is parallel to the XY plane. The first waveguide and the second waveguide have the same cross-section.

[0007] Furthermore, a first bend is provided between the narrow side and the wide side of the second waveguide, the first bend facing the first waveguide, the width of the narrow side of the first waveguide is b, and the size of the first bend d1 ∈ [0.85b, 0.90b].

[0008] Furthermore, the first bend extends from the closed end of the second waveguide to the open end and is flush with the narrow inner wall of the first waveguide.

[0009] Furthermore, a second bend is provided between the closed end and the narrow side of the second waveguide, the second bend facing the open end of the second waveguide, the width of the wide side of the first waveguide is a, and the size of the second bend d2 ∈ [0.90a, 0.95a].

[0010] Furthermore, a resonator is provided on the wide inner wall of the first waveguide.

[0011] A microwave transmission device, the microwave transmission device including the waveguide.

[0012] This utility model has the following advantages: The waveguide of this invention connects one end of the first waveguide to the wide side of the second waveguide, enabling the microwave to change its transmission direction twice in a three-dimensional coordinate system. This reduces the number of waveguides and also lowers the vertical dimension of the waveguide, resulting in a significant reduction in the size and weight of the waveguide, which is more conducive to the miniaturization of the device. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of a waveguide in the prior art; Figure 2 This is a three-dimensional structural diagram of the waveguide of this utility model; Figure 3 for Figure 1 Projection onto the XY plane; Figure 4 for Figure 2 AA section diagram in the image; Figure 5 for Figure 2 BB cross-section diagram in the middle; Figure 6 This is a three-dimensional structural diagram of the microwave transmission device of this utility model. Figure 1 ; Figure 7 This is a three-dimensional structural diagram of the microwave transmission device of this utility model. Figure 2 ; Figure 8 This is the S-curve diagram of the waveguide of this utility model; Figure 9 The simulation diagram of the field strength of the waveguide of this utility model is shown. In the diagram: 1-First waveguide; 2-Second waveguide; 3-First bend; 4-Second bend; 5-Resonator. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0017] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0018] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0019] For ease of description, the waveguide of this invention is placed in a three-dimensional coordinate system and its orientation is defined as follows: Figure 2As shown, the waveguide of this utility model includes a first waveguide 1 and a second waveguide 2 that are interconnected. Both ends of the first waveguide 1 are open. One end of the second waveguide 2 is open (hereinafter referred to as the open end) and the other end is closed (hereinafter referred to as the closed end). One end of the first waveguide 1 is connected to the front wide side of the second waveguide 2 (the end of the first waveguide 1 not connected to the second waveguide 2 is referred to as the free end). The inner wall of the right narrow side of the first waveguide 1 is flush with the inner wall of the closed end of the second waveguide 2. The inner wall of the lower wide side of the first waveguide 1 is flush with the inner wall of the lower narrow side of the second waveguide 2. The projection of the first waveguide 1 onto the XY plane and the projection of the second waveguide 2 onto the XY plane are perpendicular to each other (e.g., ...). Figure 2 and Figure 3 As shown), the wide side of the first waveguide 1 is parallel to the XY plane, and the narrow side of the second waveguide 2 is parallel to the XY plane. The cross-section of the first waveguide 1 is the same as the cross-section of the second waveguide 2, that is, the shape and size of the cross-section of the first waveguide 1 are the same as the shape and size of the cross-section of the second waveguide 2. In order to transmit microwaves from the Y direction to the Z direction and then to the X direction, that is, to realize the microwaves changing their transmission direction twice in the three-dimensional coordinate system, the existing waveguide technology (see...) Figure 1 The traditional method of forming waveguides by sequentially connecting three waveguides is not only time-consuming and material-intensive, but also results in a larger and heavier waveguide, which is not conducive to the miniaturization of the equipment. The waveguide of this invention connects one end of the first waveguide 1 to the wide side of the second waveguide 2 and makes them interconnected, which enables the microwave to change its transmission direction twice in the three-dimensional coordinate system. This reduces the number of waveguides and also reduces the vertical height of the waveguide, resulting in a significant reduction in the volume and weight of the waveguide, thus making it more conducive to the miniaturization of the equipment. In addition, the waveguide of this invention has a coating (such as gold or silver plating) on ​​the inner wall of both the first waveguide 1 and the inner wall of the second waveguide 2, which reduces microwave transmission loss, and the volume and weight of the equipment are hardly increased.

[0020] Furthermore, to achieve better electromagnetic transmission performance, a first bend 3 is provided between the inner wall of the lower narrow side of the second waveguide 2 and the inner wall of the rear wide side of the second waveguide 2. The angle between the first bend 3 and the inner wall of the lower narrow side of the second waveguide 2, and the inner wall of the rear wide side of the second waveguide 2, is 45 degrees. The first bend 3 faces the free end of the first waveguide 1. The width of the narrow side of the first waveguide 1 is b, and the dimension d1 of the first bend 3 is ∈ [0.85b, 0.90b]. Figure 2 , Figure 4 and Figure 5As shown; specifically, the waveguide of this invention cuts off part of the lower narrow side and part of the rear wide side of the second waveguide 2, and then seals the cut-off part with a first sealing plate to form a first bend 3. The first bend 3 enables the waveguide to obtain better electromagnetic transmission performance and further reduces the volume and weight of the waveguide; at the same time, in order to increase the power capacity and prevent tip discharge, the first bend 3 and the second waveguide 2 have a smooth transition (such as rounded corners), that is, the first bend 3 and the inner wall of the lower narrow side of the second waveguide 2 have a smooth transition (not shown in the figure), and the first bend 3 and the inner wall of the rear wide side of the second waveguide 2 have a smooth transition (not shown in the figure); in addition, compared with the straight edges and right angles at the connection points of the prior art, the first bend 3 and all connection points of the second waveguide 2 have a smooth transition, which can further reduce the weight of the waveguide.

[0021] Furthermore, to achieve better electromagnetic transmission performance, the first bend 3 extends from the inner wall of the closed end of the second waveguide 2 to the open end of the second waveguide 2 and is flush with the inner wall of the left narrow side of the first waveguide 1, as shown below. Figure 3 and Figure 5 As shown; in order to increase power capacity and prevent tip discharge, the first bend 3 and the inner wall of the closed end of the second waveguide 2 are smoothly transitioned (not shown in the figure). Similarly, the smooth transition can also further reduce the weight of the waveguide.

[0022] Furthermore, to achieve better electromagnetic transmission performance, a second bend 4 is provided between the inner wall of the closed end of the second waveguide 2 and the inner wall of the upper narrow side of the second waveguide 2. The angle between the second bend 4 and the inner wall of the closed end of the second waveguide 2, as well as the inner wall of the upper narrow side of the second waveguide 2, is 45 degrees. The second bend 4 faces the open end of the second waveguide 2. The width of the wide side of the first waveguide 1 is a, and the dimension d2 of the second bend 4 is ∈ [0.90a, 0.95a]. Figure 2 , Figure 3 and Figure 5As shown; specifically, the waveguide of this invention cuts off part of the upper narrow side and part of the closed end of the second waveguide 2, and then seals the cut-off part with a second sealing plate to form a second bend 4. The second bend 4 enables the waveguide to obtain better electromagnetic transmission performance and further reduces the size and weight of the waveguide. At the same time, in order to increase the power capacity and prevent tip discharge, the second bend 4 and the second waveguide 2 have a smooth transition (such as rounding), that is, the second bend 4 has a smooth transition with the inner wall of the upper narrow side of the second waveguide 2 (not shown in the figure), the second bend 4 has a smooth transition with the inner wall of the closed end of the second waveguide 2 (not shown in the figure), the second bend 4 has a smooth transition with the inner wall of the front wide side of the second waveguide 2 (not shown in the figure), and the second bend 4 has a smooth transition with the inner wall of the rear wide side of the second waveguide 2 (not shown in the figure). Similarly, the smooth transition can also further reduce the weight of the waveguide.

[0023] Furthermore, to filter out harmonics, three resonators 5 are provided on the inner wall of the wide side of the first waveguide 1. Specifically, the resonators 5 are disposed on the inner wall of the lower wide side and / or the inner wall of the upper wide side of the first waveguide 1, and the three resonators 5 are evenly arranged along the centerline of the inner wall of the wide side of the first waveguide 1. Figures 2 to 5 The height of the resonator 5 is 1 / 8 of the microwave wavelength; the resonator 5 is made of a non-magnetic metal material, such as gold, silver, copper, aluminum, etc.; in order to further reduce the weight of the waveguide, the resonator 5 is a hollow structure, such as being made of aluminum or copper tubes.

[0024] A microwave transmission device includes waveguides, wherein a first waveguide 1 has a first flange at its free end, and a second waveguide 2 has a second flange at its open end. Figure 6 and Figure 7 As shown.

[0025] In summary, the waveguide of this invention has a simple and compact structure, small size and light weight, which is beneficial for the miniaturization of equipment, and its electromagnetic transmission performance is good (e.g., Figure 8 and Figure 9 As shown in the figure, it is suitable for widespread use.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waveguide, characterized in that: It includes a first waveguide (1) and a second waveguide (2) that are interconnected. One end of the second waveguide (2) is open and the other end is closed. One end of the first waveguide (1) is connected to the wide side of the second waveguide (2). The projection of the first waveguide (1) on the XY plane is perpendicular to the projection of the second waveguide (2) on the XY plane. The wide side of the first waveguide (1) is parallel to the XY plane, and the narrow side of the second waveguide (2) is parallel to the XY plane. The first waveguide (1) and the second waveguide (2) have the same cross-section.

2. The waveguide according to claim 1, characterized in that: A first bend (3) is provided between the narrow side and the wide side of the second waveguide (2), the first bend (3) is directed toward the first waveguide (1), the width of the narrow side of the first waveguide (1) is b, and the size d1 of the first bend (3) is [0.85b, 0.90b].

3. The waveguide according to claim 2, characterized in that: The first bend (3) extends from the closed end of the second waveguide (2) to the open end and is flush with the narrow inner wall of the first waveguide (1).

4. The waveguide according to claim 3, characterized in that: A second bend (4) is provided between the closed end and the narrow side of the second waveguide (2). The second bend (4) faces the open end of the second waveguide (2). The width of the wide side of the first waveguide (1) is a. The size d2 of the second bend (4) is [0.90a, 0.95a].

5. The waveguide according to any one of claims 1 to 4, characterized in that: The first waveguide (1) has a resonator (5) on its wide inner wall.

6. A microwave transmission device, characterized in that: The microwave transmission device includes the waveguide as described in any one of claims 1 to 5.

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